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Climate control
AIR CONDITIONING
CLIMATE CONTROL
MANUAL CLIMATE CONTROL
JM0B - JM0C - JM0F - JM0G - JM0H - JM0J - JM0U
77 11 322 282
"The repair procedures given by the manufacturer in this document are based on thetechnical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by themanufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
SEPTEMBER 2005
All rights are reserved by RENAULT s.a.s.
EDITION ANGLAISE
Copying or translating, in part or in full, of this document or use of the service partreference numbering system is prohibited without the prior written authority ofRENAULT s.a.s..
Renault s.a.s. 2005
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Climate control
Contents
Page
62A
62B
62C
AIR CONDITIONING
Introduction 62A-1
Fault finding log 62A-5Function layout 62A-7
General operating mode 62A-8
Configuration readings and
configurations 62A-16
Conformity check 62A-17
Customer complaints 62A-43
Fault finding chart 62A-44
CLIMATE CONTROL
Program No.: 0003 - Vdiag No.: 44
Introduction 62B-1System operation 62B-6
Allocation of computer tracks 62B-8
Configuration and programming 62B-9
Fault finding log 62B-10
Summary of faults 62B-12
Interpretation of faults 62B-13
Interpretation of statuses 62B-21
Interpretation of parameters 62B-27
Conformity check 62B-34
Customer complaints 62B-40
Fault finding chart 62B-41
Help 62B-54
MANUAL CLIMATE CONTROL
Introduction 62C-1
System operation and
allocation of tracks 62C-4
Fault finding log 62C-6
Customer complaints 62C-8
Fault finding chart 62C-9
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ABBREVIATIONSABBREVIATIONS
ABBREVIATIONS MEANING OF ABBREVIATION
ABS system Anti-lock braking system
Fault Finding Chart Fault Finding Chart
APC After ignition
AVC Before ignition feed
BVA Automatic gearbox
Manual gearbox Manual gearbox
BVR Sequential gearbox
CAN Controller Area Network
AC Air conditioning
CD Compact disc
PAS Power assisted steering (hydraulic)
DAE Electric power assisted steering
DVD Digital versatile disc
DTC Fault finding code
EGR Exhaust gas recirculation
ESP Electronic Stability Program
GMV Fan assembly
CNG Compressed natural gas
LPG Liquefied petroleum gas
HLE High yield strength
MAG Metal active gas (for welding steel)
MIG Metal inert gas (for welding aluminium)
MR Workshop repair manual
TN Technical Note
OBD On board diagnostics
SER Resistance spot welding
SSPP Tyre pressure monitoring system
THLE Very high-tensile strength
TM Labour time
UCH UCH
UPC Protection and switching unit
UCT Roof control unit
UHLE Ultra high yield strength
VIN Vehicle identification number
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AIR CONDITIONING
Fault finding - Introduction 62A
62A-1
Manual air conditioningand
Climate control
162AAIR CONDITIONING
Fault finding - Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault Finding Procedures (this document and the Technical Notes for the injection fitted to the
vehicle, the UCH and the Protection and Switching Unit:
Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
Visu-Schma (CD-ROM), paper version.
Type of diagnostic tools
CLIP
Special tooling required
3. RECAP
Procedure
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition
feed).
Proceed as follows:
Renault card in the card reader (keyless vehicle scenario 1, entry level, not hands-free and scenario 2, top of the
range, hands-free)
press and hold the Start button (longer than 5 seconds) with start-up conditions not fulfilled, connect the diagnostic tool and perform the desired operations.
To cut off + after ignition feed, proceed as follows:
disconnect the diagnostic tool,
press the Start button twice briefly (less than 3 seconds),
check that the + after ignition feed has been cut off by checking that the computer warning lights on the instrument
panel have gone out.
Vehicle: Scenic II
Function concerned: air conditioning
SPECIAL TOOLING REQUIRED
Multimeter
El. 1681 Universal bornier
Note:
The left-hand and right-hand xenon bulb computers are powered when the dipped beam headlights light up. Fault
finding procedures can only be carried out on them after the ignition has been switched on in fault finding mode
(forced + after ignition feed) and the dipped headlights are on.
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AIR CONDITIONING
Fault finding - Introduction 62A
62A-2
Manual air conditioningand
Climate control
Faults
Faults are declared either present or stored (depending on whether they appeared in a certain situation and have
disappeared since, or whether they remain but have not been diagnosed within the current context).
The present orstored status of faults should be taken into consideration when the diagnostic tool is used after the
+ after ignition feed has been supplied (without acting on the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the notes section.
If the fault is confirmed when the Notes are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
the electrical lines which correspond to the fault,
the connectors for these lines (for oxidation, bent pins, etc),
the resistance of the component detected as faulty,
The condition of the wires (insulation melted or split, chafing, etc.).
Conformity check
The aim of the conformity check is to check statuses and parameters that do not produce a fault display on the
diagnostic tool when inconsistent. Therefore, this phase is used to:
carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.
check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section features the fault finding procedures for statuses and parameters, and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Notes about the conformity check for the climate control system
The air conditioning system conformity check is divided into four parts. The parts relate to the four air conditioning
subsystems, heater, cold loop, user selection and passenger compartment ventilation.
The statuses and parameters related to these sub-functions are listed with their respective computers.
NOTE: the manual air conditioning control panel does not control electrical components and cannot be subjected to
fault finding. Therefore, there is no conformity check in the 62C Manual air conditioning section.
Customer complaints Fault finding charts
If the test with the diagnostic tool is OK, but the customer complaint persists, the fault should be treated by
customer complaints.
Note:
The interpretation of statuses, parameters and commands is also split into several sections. Everything controlledby the air conditioning control panel is explained in the two Air conditioning sections, 62A and 62B. By contrast,
signals from other computers are explained in the "fault finding" sections for these computers (see the conformity
check).
A synopsis of the general procedure to follow is provided on the following
page in the form of a flowchart.
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AIR CONDITIONING
Fault finding - Introduction 62A
62A-3
Manual air conditioningand
Climate control
4. FAULT FINDING PROCEDURE
Check the battery charge and the
condition of the fuses
Print the system fault finding log
(available on CLIP and in theWorkshop Repair Manual or
Technical Note)
Connect CLIP
Dialogue with
Electronic Control
Unit?
no
yes
Read the faults
no
Faults present
yes
Deal with present faults
Deal with stored faults
The cause is still
present
no Fault
solved
yes
See fault finding chart 1
Conformity check
The cause is still
present
no Fault
solved
Use fault finding charts (ALPs)
The cause is still
present
no Fault
solved
Contact Techline with the
completed fault finding log
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AIR CONDITIONING
Fault finding - Introduction 62A
62A-4
Manual air conditioningand
Climate control
5. FAULT FINDING LOG
You will always be asked for this report:
when requesting technical assistance from the Techline.
for approval requests when replacing parts for which approval is obligatory.
to be enclosed when returning monitored parts on request. The log is needed for warranty reimbursement, and
enables better analysis of the parts removed.
6. SAFETY ADVICE
All work on components requires that the safety rules be obeyed to prevent damage or injury:
Make sure the battery is properly charged to avoid damaging the computers with a low load.
Use the appropriate tools.
IMPORTANT:
Any fault on a complex system requires thorough fault finding with the appropriate tools. The FAULTFINDING LOG, which should be completed during the fault finding procedure, ensures a record is kept of
the procedure carried out. It is an essential document when consulting the manufacturer.
IT IS THEREFORE COMPULSORY TO COMPLETE A FAULT FINDING LOG
EVERY TIME A FAULT FINDING PROCEDURE IS PERFORMED.
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List of monitored parts: Computer
FAULT FINDING LOGSystem: Climate control
Page 1/2
Administrative identification
Date 2 0
Log completed by
VIN
Engine
Diagnostic tool CLIP
Update version
Customer complaint
1127 No warm air 1129 Faulty air distribution 1130 Incorrect temperature
setpoint
1128 No cold air 1125 Heating/air conditioning:
ventilation
1182 Heating/air conditioning:
demisting
Other Your comments:
Conditions under which the customer complaint occurs
011 When ignition is
switched on
005 While driving 004 Intermittently
010 Gradual
deterioration
012 When the air conditioning is
switched on
009 Sudden fault
Other Your comments:
Documentation used in fault finding
Fault finding procedure used
Type of diagnostic manual: Workshop Repair Manual Technical Note Assisted fault finding
Fault finding manual no:
Wiring diagram used
Wiring Diagram Technical Note No:
Other documentation
Title and/or part number:
FD 04
Fault finding log
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To be read with the Diagnostic tool (Identification screen):
FAULT FINDING LOGSystem: Climate control
Page 2/2
Computer identification and system parts replaced
Part 1 part no.
Part 2 part no.
Part 3 part no.Part 4 part no.
Part 5 part no.
Computer part no.
Supplier no.
Program no.
Software version
Calibration no.
VDIAG
Faults found with the diagnostic tool
Fault no. Present Stored Fault name Specification
Conditions under which fault occurs
Status or parameter no. Parameter name Value Unit
Exterior temperature
Interior temperature
Refrigerant pressure
System-specific information
Description:
Additional information
What factors led you to replace the
computer?What other parts were replaced?
Other defective functions?
Your comments:
FD 04
Fault finding log
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AIR CONDITIONING
Fault finding - Function architecture 62A
Air conditioning system design
The air conditioning system uses four computers. The four computers are connected by the multiplex system, except
in the case of manual air conditioning, where the connection between the air conditioning control panel and the UCHis by normal wiring.
The air conditioning control panel interprets the driver's wishes and transmits them to the other computers; it also
manages the passenger compartment ventilation, air distribution, air mixing and air recirculation.
The UCH transmits the request to engage the air conditioning compressor to the injection and controls the operation
of the passenger compartment heating resistors (RCH).
The injection receives the refrigerant fluid pressure signal from the pressure sensor. The injection computer
authorises or inhibits the request to engage the compressor depending on how the vehicle is operating and transmits
the signal to the Protection and Switching Unit (UPC).
The role of the UPC is to manage the power section of the air conditioning system. It controls the engagement of the
compressor, the engine cooling fan units and the heated rear screen.
GLOSSARY
RCH = passenger compartment air heating resistors
AC control panel UCH
interpretation of driver's
wishes passenger compartment
ventilation management air distribution management air mixing management
passenger compartment air
heating resistors operationmanagement
UPC
(Power and Switching Unit)Injection computer
engine unit management
compressor control
heated rear screen control
air conditioning authorisation
Manual air conditioningand
Climate control Fault finding - Function architecture
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AIR CONDITIONING
Fault finding - Mode of operation 62AManual air conditioning
andClimate control Fault finding - Mode of operation
General operation
The air conditioning system is composed of four sub-functions: heating, cold loop, passenger compartment
ventilation and user selection. Fault finding on the climate control is performed in two different ways using the
diagnostic tool.The first procedure is by computer fault finding which makes it possible to communicate with just one computer
(select the computer concerned). The second procedure consists of performing fault finding by function which
allows communications to be established with all four computers of the AIR CONDITIONING function.
Description of the subsystems
Heating subsystem: this subsystem includes everything relating to the production of warm air in the vehicle and
management of the heated rear screen.
The main computers involved are the climate control computer (air mixing and blown air setpoint) and the UCH
(control and management of the passenger compartment heating resistors). The Protection and Switching Unitcontrols the heated rear screen (and heated door mirror). The injection computer is only included in this subsystem
to supply the signals required for its management.
Cold loop subsystem: this subsystem includes everything involved in the vehicle's production of cold air.
The computers concerned are the climate control computer for air mixing, the injection computer to authorise
compressor engagement and the UPC to control the compressor and the engine fan units. On climate control
systems, the UCH merely transmits the request to engage the compressor from the climate control computer to the
injection computer.
On manual air conditioning systems, the UCH authorises or inhibits transmission of the request to engage the
compressor from the climate control computer to the injection computer depending on the status of the passenger
compartment blower (with manual air conditioning, the UCH receives and manages the passenger compartment
blower speed signal: compressor engagement is inhibited if the fan is not running).
User selection subsystem: this subsystem includes everything used to transmit the user's requests (pressing
buttons). The computers concerned are the climate control computer for climate control systems and the UCH. The
two other computers are not used for manual air conditioning.
Passenger compartment ventilation subsystem (climate control systems only): this subsystem includes
everything involved in ventilation, air mixing, air recirculation and air distribution. Therefore, only the climate control
computer is involved.
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AIR CONDITIONING
Fault finding - Mode of operation 62A
Exchanges between the four air conditioning system computers
air conditioning request 1 (compressor
engagement) switch on passenger compartment heating
resistors (RCH) request
switch on heated rear screen request
(+ electric door mirrors)
passenger compartment ventilation signal
Climate
control panelUCH
passenger compartment heating resistors (RCH)
operation management
exterior temperature signal
engine coolant temperature signal
switch on heated rear screen request
(+ electric door mirrors)
UCHUPC
(Power and Switching Unit)
alternator charge signal
number of passenger compartment heating
resistors authorised by alternator
air conditioning request 2 (compressor
engagement)
fast idle request for passenger compartment
heating resistors (RCH)
UCH Injection computer
compressor engagement authorisation
engine coolant temperature signal refrigerant fluid pressure signal number of passenger compartment heating
resistors authorised by injection
compressor engagement request
switch on engine cooling fan request
Injection computerUPC
(Power and Switching Unit)
alternator charge signal
Manual air conditioningand
Climate control
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AIR CONDITIONING
Fault finding - Mode of operation 62AManual air conditioning
andClimate control
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Summary of components controlled or managed by the climate control computer
Ventilation and climate control unit
Passengercompartment
blowerVehicle multiplex
network
Passenger
compart-ment blower
powermodule
Recir-
culation
motor
Distribution
motor
Mixing
motor
Interior
temperaturesensor
Solar radiationsensor
Actuator control Sensor management
Climate control computer (control panel)
Climate control
management
(hot and cold)
User requests
management
(buttons pressed)
Button lighting
Key:
Wire connections =
Multiplex connections =
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AIR CONDITIONING
Fault finding - Mode of operation 62A
62A-11
Manual air conditioningand
Climate control
Summary of components controlled or managed by the manual air conditioning computer
Ventilation and climate control unit
Passengercompartment
blower
Resistor
unit
Recircu-
lation flap
Distribution
flap
Mixing
flap Vehicle multiplexnetwork
Actuator control
Manual air conditioning computer
(control panel)
Button lights
(air conditioning button
and heated rear screen
button)
Passenger
compartment blower
operation signal
(running or stopped)
User request
management
(air conditioning button
and heated rear screen
button pressed)
UCH Transmission of requests
(air conditioning, heated
rear screen)
Key:
Wire connections =Multiplex connections =
Mechanical connections =(cable controls)
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AIR CONDITIONING
Fault finding - Mode of operation 62A
62A-12
Manual air conditioningand
Climate control
Block diagram of components controlled or managed by the control panel of heater
versions without air conditioning
Ventilation unit
Passengercompartment
blower
Resistorunit
Recircu-lation flap
Distributionflap
Mixingflap Vehicle multiplex
network
Actuator control
user control panel
Button lights (heated rear
screen button)
Passenger
compartment blower
operation signal
(running or stopped)
User request
management (heated
rear screen button
pressed)
UCH Transmission of the request
to switch on the heated rear
screen
Key:
Wire connections =Multiplex connections =
Mechanical connections =(cable controls)
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AIR CONDITIONING
Fault finding - Mode of operation 62A
Summary of components controlled or managed by the UCH
Summary of components controlled or managed by the Protection and Switching Unit
Passenger
compartment
heatingresistors (RCH)
relay No. 2
Passenger
compartment
heatingresistors (RCH)
relay No. 1
Passenger compartment
heating resistors (RCH)relay No. 3 (Scnic only)
Exterior
temperaturesensor
Vehicle
multiplex
network
Actuator control Sensor management
UCH
Air conditioning request
management
Heated rear screen
control
management
Passenger compart-
ment heating resistor
control management
Engine cooling
fan unit
Heated rear
screen and
heated door
mirrors
Climate control
compressor
Alternator:
"DF"
terminal
Actuator control Electrical availability management
UPC
"DF" terminal signal formatting
(alternator charge)
Key:
Wire connections =
Multiplex connections =
62A-13
Manual air conditioningand
Climate control
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AIR CONDITIONING
Fault finding - Mode of operation 62A
62A-14
Manual air conditioningand
Climate control
Summary of components controlled or managed by the injection computer
Refrigerant fluid
pressure sensor
Engine coolanttemperature
sensor
Vehiclemultiplex
network
Sensor management
Engine injection computer
Management of the cold loop (refrigerant fluid pressure,
switch on engine cooling fan request, compressor
engagement authorisation, etc.)
Passenger compartment
heating resistors (RCH)
authorised power
management
Key:
Wire connections =
Multiplex connections =
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AIR CONDITIONING
Fault finding - Mode of operation 62A
62A-15
Manual air conditioningand
Climate control
Compressor control flowchart
ET143Air
conditioning request 1
(climate control)
Climate control panel ET029 Air
conditioning button
(manual air
conditioning)
ET030Air
conditioning request 2
UCH
ET088 Compressor
engagement request
Injection computerET004Air conditioning
authorisation
UPC
(Power and Switching Unit)
Control via wire
connection
Special notes:
This flowchart shows the path of the
compressor engagement request.
Components which may block this request
are not listed (passenger compartment
blower operation signal for the UCH on
manual air conditioning version, correct
refrigerant fluid pressure for the injection,
etc.).
If the compressor does not engage (one of
the requests not transmitted): carry out aconformity check.
Climate
control
compressor
Key:
Multiplex signals.
Wire connections.
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AIR CONDITIONING
Fault finding - Configurations and configuration reading 62A
62A-16
Manual air conditioningand
Climate control
Fault finding - Configurations and configuration reading
Climate control system configurations
Climate control system configuration readings
Computers Configuration Option Comment
Air conditioning (climatecontrol computers only) CF044 Vehicle type B84/L84/J84/E84 Manual configuration(with CLIP)CF117 Type of heating
resistors
Without/1000 W/
1800 W
UCH SC008 Type of UCH Configuration scenario
(possible to register all the
UCH functions).
Injection (all types)X X
Automatic computer
configuration
Protection and Switching
Unit
CF001 Type of alternator KCB1 90 BOSCH
TG11 110 VALEO
SG12 VALEO LIE8 150 BOSCH
SG15L VALEO
Other type
Manual configuration
(with CLIP)
Computers Configuration reading Option Comment
Climate control LC013 Vehicle type B84/J84/E84 None
LC043 Heating resistor without/1000 W/1800 W
UCH LC013 Type of air conditioning climate control/
manual/heating
None
LC030 Type of heating resistorswithout/1000 W/
1500 W
LC011 Vehicle type All except E8h
S3000 injection
NOTE: These
functions areonly valid for the
S3000 injection
(K4J/K4M/F4R
and F4R
Turbocharged
engines
LC009 Air conditioning connected/not
connected
Following the first
compressor engagement
request:LC009 connected
LC016 With
LC016 Air conditioning pressuresignal management
with/without
ET079 Air conditioning present yes/no ET079
LC025 Heating resistor with/without None
Protection and
Switching Unit
LC001 Type of alternator KCB1 90 BOSCH
TG11 110 VALEO
SG12 VALEO
LIE8 150 BOSCH
SG15L VALEO
Other type
None
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AIR CONDITIONING
Fault finding - Conformity check 62AManual air conditioning
andClimate control Fault finding - Conformity check
Subsystem: cold loop
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12 volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioningcompressor not engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant).
Fault finding procedures for the statuses, parameters and commands listed in this
check are explained in the Technical Notes relating to the computer which generates
the signal (see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
ET143: Air conditioning
request 1.
ACTIVE for air conditioning
request (AC button pressed
orAUTO button pressed
with "maximum cold"
request).
INACTIVE otherwise.
NOTE: This status is only
valid forclimate control
systems.
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the climate control
computer to the UCH to
engage the compressor
(refer to the flowchart in
the general operation
section).
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141: Passenger
compartment
blower.
STOPPED
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative forclimate
control systems.
PR012: Mixing flap
position.
0% = Max. cold position
(15 C)
100% = Max. warm position
(27 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
PR006: Solar radiation. 0 watts (no solar radiation)
to 400 watts (maximum
solar radiation).
If there is a fault, refer to the
fault finding procedure
for this parameter.
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-18
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 1)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
ET030: Air conditioning
request 2.
INACTIVE
(engagement of the
compressor is only
authorised when the engine
is running).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the UCH to the injection
computer to engage the
compressor (refer to the
flowchart in the general
operation section).
PR002: Exterior
temperature.
X = exterior temperature
5 C(invalid value: 215 C)
If there is a fault, refer to the
fault finding procedurefor this parameter.
ET015: Passenger
compartment
blower.
INACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative formanual airconditioning (and heating
versions without air
conditioning).
ET091: Engine running. NO
NOTE: This status is
displayed by the UCH but it
is generated by the injection
computer.
If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
Injection
ET079: Air conditioning
present.
YES
(automatic injection
computer configuration).
If the status displays NO,
refer to the fault finding
procedure for this status.
PR064: Coolant
temperature.
X = engine coolant
temperature.
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET004: Air conditioning
authorisation.
NO
(no authorisation with
engine stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-19
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 2)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Injection
(continued 1)
ET088: Compressor
activation request.
INACTIVE
(engagement of the
compressor is only
authorised when the engine
is running).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the injection computer to
the Protection and
Switching Unit to engage
the compressor (refer to the
flowchart in the general
operation section).
PR089: Vehicle speed. 0 mph or km/h If there is a fault, refer to thefault finding procedure
for this parameter.
PR055: Engine speed. 0 rpm. If there is a fault, refer to the
fault finding procedure
for this parameter.
ET023: Fast idle request
(except EDC 16
injection).
ABSENT If there is a fault: refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the EDC16
injection (F9Q engine).
PR053: Engine speed
required by air
conditioning
(except S3000 and
DDCR injections).
0 rpm. If there is a fault, refer to the
fault finding procedure
for this parameter.
NOTE: This parameter is
only displayed by the
EDC16 injection (F9Q
engine).
PR037: Refrigerant
pressure.
1 bar < X < 15 bar If there is a fault, refer to the
fault finding procedure
for this parameter.
PR125: Power absorbed
by AC
compressor.
0 W < X < 300 W
(ambient temperature
23 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
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Fault finding - Conformity check 62A
62A-20
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 3)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Injection
(continued 2)
ET022: Low speed fan
request (except
3000 injection)
INACTIVE
NOTE: This status is not
displayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).
If there is a fault, refer to the
fault finding procedure
for this status.
For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluid
pressure), refer to the
HELP section (62B).
ET021: High speed fan
request (exceptS3000 injection).
INACTIVE
NOTE: This status is notdisplayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).
If there is a fault, refer to the
fault finding procedurefor this status.
For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluidpressure), refer to the
HELP section (62B).
ET014: Fan unit 1 check
(except DDCRinjection).
STOPPED If there is a fault, refer to the
fault finding procedurefor this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
ET015: Fan unit 2 check
(except DDCR
injection).
STOPPED If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
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Fault finding - Conformity check 62A
62A-21
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 4)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Protection and
Switching Unit
ET007: High speed fan
control.
INACTIVE
(On Mgane saloons and
sport hatches this status is
always
ACTIVE: ignore it).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative on Mgane
Scnics (2 engine cooling
fans and Fan unit 2 relay
outside the UPC).
AC008: Compressor
control.
Command for testing the
operation of the airconditioning compressor
clutch.
If there is a fault, consult the
fault finding procedurefor this command.
NOTE: The UPC cannottest the compressor control
circuit; this command is the
only way to test its
operation.
AC009: Low speed fan
unit.
Command for testing the
low speed operation of theengine cooling fan unit
(Fan unit 1).
If there is a fault, consult the
fault finding procedurefor this command.
NOTE: The UPC cannot
test the control circuit for
Fan unit 1; this command isthe only way to test its
operation.
AC010: High speed fan
unit
Command for testing the
high speed operation of
the engine cooling fan unit
(Fan unit 2).
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: On Mgane saloons
and sport hatches the UPC
cannot test the control
circuit for Fan unit 2; this
command is the only way to
test its operation.
On Mgane Scnics, theFan unit 2 control relay is
outside the UPC and its
control line is tested by
(DF002 High speed fan
control relay circuit).
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Fault finding - Conformity check 62A
62A-22
Manual air conditioningand
Climate control
Subsystem: heating
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12 volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioningcompressor not engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant).
Fault finding procedures for the statuses, parameters and commands listed in this
check are explained in the Technical Notes relating to the computer which generates
the signal (see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
ET086: Heated rear
screen: manual
mode.
ACTIVE: De-icing button at
the bottom of the control
panel pressed.
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET085: Heated rear
screen: auto
mode.
ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
PR121: Blown air
temperature
setpoint.
0 < X < 80 C. If there is a fault, refer to the
fault finding procedure
for this parameter.
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C).
If there is a fault, refer to the
fault finding procedure
for this parameter.
PR012: Mixing flap
position.
0 % = Max. cold position (15
C)
100 % = Max. hot position
(27 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141: Passenger
compartment
blower.
OFF
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative forclimate
control systems.
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Fault finding - Conformity check 62A
62A-23
Manual air conditioningand
Climate control
Subsystem: heating (continued 1)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
PR001: Battery voltage. 10.5 < X < 14.4 volts. If there is a fault, refer to the
fault finding procedure
for this parameter.If the
fault is still present, carry
out a fault finding test on
the charge circuit.
PR002: Exterior
temperature.
X = exterior temperature
5 C
(invalid value: 215 C).
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET025: Retractable roof. CLOSED orNOT CLOSEDABSENT if the vehicle does
not have one.
If there is a fault, refer to thefault finding procedure
for this status.
ET091: Engine running: NO
NOTE: This status is
displayed via the UCH but it
is generated by the injection
computer.
If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
ET015: Passenger
compartment
blower.
INACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning (and heater
versions without air
conditioning).
ET026: Heated rear
screen switch.
INACTIVE
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET031: Fast idle request
for RCH.
INACTIVE
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET017: Number RCH
required.
0, 1, 2 or 3 for Mgane
saloons and sport hatches
(1000 watt RCH).
0, 1, 2, 3, 4 or 5 for Mgane
Scnics (1800 watt RCH).
(according to heat
requirement).
If there is a fault, refer to the
fault finding procedure
for this status.
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Fault finding - Conformity check 62A
62A-24
Manual air conditioningand
Climate control
Subsystem: heating (continued 2)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
(continued)
ET018: Number RCH
authorised by
alternator.
0
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET019: Number RCH
authorised by
injection.
0
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET020: Number RCH
actuated.
0
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET021: RCH no. 1 control
relay.
INACTIVE
(Inhibited with enginestopped).
If there is a fault, refer to the
fault finding procedurefor this status.
ET022: RCH no. 2 control
relay.
INACTIVE
(Inhibited with engine
stopped).
If there is a fault, refer to the
fault finding procedure
for this status.
ET023: RCH no. 3 controlrelay (Mgane
Scnic and
Scnic 4x4 only).
INACTIVE(Inhibited with engine
stopped).
If there is a fault, refer to thefault finding procedure
for this status.
NOTE: This status is
inoperative for Mganesaloons and Mgane sport
hatches.
AC016: RCH no. 1 relay. Commands for testing the
operation of the RCH
(passenger compartment
air heating resistors). The
number of RCH stages
switched on depends on the
number of relays actuated.
NOTE: RCH no. 3 relay is
only fitted to Mgane
Scnics.
If there is a fault, refer to the
fault finding procedure
for these controls.
NOTE: To find the relays
actuated/number of RCH
engaged correlation, refer
to the "general operation"
section of the UCH
Technical Note.
AC017: RCH no. 2 relay.
AC018: RCH no. 3 relay
(Mgane Scnic
only).
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Fault finding - Conformity check 62A
62A-25
Manual air conditioningand
Climate control
Subsystem: heating (continued 3)
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Injection
ET024: Set number of
RCH.
NO
NOTE:According to the
injection's requirements:
power requirement, torque
reduction, etc., the injection
computer sets the number
of RCH stages switched on
(no more, no less).
If there is a fault, refer to the
fault finding procedure
for this status.
PR064: Coolant
temperature.
X = engine coolant
temperature.
If there is a fault, refer to the
fault finding procedure
for this parameter.
Protection and
Switching Unit
PR002: Alternator chargesignal
99 %, engine stopped. If there is a fault, refer to thefault finding procedure
for this parameter.
AC011: Heated rear
screen.
Command for testing the
operation of the rear screen
heating.
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: The UPC cannottest the heated rear screen
control circuit; this
command is the only way to
test its operation.
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Fault finding - Conformity check 62A
62A-26
Manual air conditioningand
Climate control
Subsystem: user selection
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12 volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioningcompressor not engaged).
NOTE: The interpretation of the statuses, parameters and controls listed in this check
is explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
ET086: Heated rear
screen: manual
mode.
ACTIVE: De-icing button at
the bottom of the control
panel pressed.
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET085: Heated rear
screen: auto
mode.
ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET143: Air conditioning
request 1.
ACTIVE for air conditioning
request (AC button pressedorAUTO button pressed
with "maximum cold"
request).
INACTIVE otherwise.
Note: This status is only
valid forclimate control
systems.
If there is a fault, refer to the
fault finding procedurefor this status.
NOTE: This status
represents the request from
the climate control
computer to the Passenger
Compartment Control Unit
to engage the compressor
(refer to the flowchart in
the general operation
section).
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Fault finding - Conformity check 62A
62A-27
Manual air conditioningand
Climate control
Subsystem: user selection (continued)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
ET029: Air conditioning
button.
PRESSED if the AC button
on the air conditioning
control panel is pressed.
RELEASED otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative formanual air
conditioning.
ET028: Heated rear
screen button.
PRESSED if the heated
rear screen button on the
air conditioning control
panel is pressed.RELEASED otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning (and heaterversions without air
conditioning).
ET015: Passenger
compartment
blower.
INACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning (and heater
versions without air
conditioning).
AC015: Air conditioning
button light.
Command enabling the air
conditioning button light to
be illuminated to check its
operation.
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: This command only
operates formanual air
conditioning.
AC019: Heated rear
screen indicator
light.
Command enabling the
heated rear screen button
light to be illuminated to
check its operation.
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: This command only
operates formanual airconditioning (and heater
versions without air
conditioning).
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Fault finding - Conformity check 62A
62A-28
Manual air conditioningand
Climate control
Subsystem: passenger compartment ventilation
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: ignition on (12 volts APC), engine stopped, AIR CONDITIONING
SWITCHED OFF (passenger compartment blower switched off and air conditioningcompressor not engaged).
NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant). Fault finding
procedures for the statuses, parameters and commands listed in this check are
explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
PR019: Passenger
compartment
blower PWM
setpoint.
Speed 0 = 0 %.
Speed 8 = 100 %.
NOTE: The "PWM" signal is
a modulated control voltage
used to control the
passenger compartment
blower power module.
If there is a fault or formore
information (to find the
intermediate speed
percentages), refer to the
fault finding procedure
for this parameter.
PR012: Mixing flap
position.
0 % = Max. cold position (15
C)100 % = Max. warm
position (27 C)
If there is a fault, refer to the
fault finding procedurefor this parameter.
ET062: Recirculation flap
position.
OPEN if the flap is in the
outside air position.
CLOSED if the flap is in the
recirculation position.
If there is a fault, refer to the
fault finding procedure
for this status.
PR011: Distribution flap
position.
from 0 % to 100 %.
NOTE:
0 % = Full air vents position
100 % = De-icing position.
If there is a fault or formore
information (various flap
opening values according
to the user selection), refer
to the fault findingprocedure for this
parameter.
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Fault finding - Conformity check 62A
62A-29
Manual air conditioningand
Climate control
Subsystem: passenger compartment ventilation (continued)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Climate control
(continued)
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C).
If there is a fault, refer to the
fault finding procedure for
this parameter.
PR002: Exterior
temperature.
X = exterior temperature
5 C
(invalid value: 215 C).NOTE: This status is
displayed via the climate
control computer but is
generated by the UCH.
If there is a fault, refer to the
fault finding procedure for
this parameter(UCHTechnical Note).
PR006: Solar radiation. 0 watts (no solar radiation)
to 400 watts (maximumsolar radiation).
If there is a fault, refer to the
fault finding procedure forthis parameter.
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Fault finding - Conformity check 62A
62A-30
Manual air conditioningand
Climate control
Subsystem: cold loop
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed, AIR CONDITIONING OPERATING (air
conditioning compressor engaged).NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant).
Fault finding procedures for the statuses, parameters and commands listed in this
check are explained in the Technical Notes relating to the computer which generates
the signal (see the Introduction section).
Computer(signal generator)
Parameter or statuschecked or action
Display and Notes Fault finding
Climate control
ET143: Air conditioning
request 1.
ACTIVE
NOTE: This status is only
valid forclimate control
systems.
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the climate control
computer to the UCH to
engage the compressor
(refer to the flowchart in
the general operation
section).
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141: Passenger
compartment
blower.
RUNNING
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative forclimate
control systems.
PR012: Mixing flapposition.
0% = Max. cold position(15 C)
100% = Max. warm position
(27 C)
If there is a fault, refer to thefault finding procedure
for this parameter.
PR006: Solar radiation. 0 watts (no solar radiation)
to 400 watts (maximum
solar radiation).
If there is a fault, refer to the
fault finding procedure
for this parameter.
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Fault finding - Conformity check 62A
62A-31
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 1)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
ET030: Air conditioning
request 2.
ACTIVE If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the UCH to the injection
computer to engage the
compressor (refer to the
flowchart in the general
operation section).
PR002: Exterior
temperature
X = exterior temperature
5 C(invalid value: 215 C)
If there is a fault, refer to the
fault finding procedurefor this parameter.
ET015: Passenger
compartment
blower.
ACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
Note: This status is only
operative formanual airconditioning(and heater
versions without air
conditioning).
ET091: Engine running: YES
NOTE: This status is
displayed by the UCH but it
is generated by the injection
computer.
If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
Injection
ET079: Air conditioning
present.
YES
(automatic injection
computer configuration).
If the status displays NO,
consult the fault finding
procedure for this status.
PR064: Coolant
temperature.
X = engine coolant
temperature.
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET004: Air conditioning
authorisation.
YES If the status displays NO,
consult the fault finding
procedure for this status.
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Fault finding - Conformity check 62A
62A-32
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 2)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Injection
(continued 1)
ET088: Compressor
activation request.
ACTIVE If the status displays
INACTIVE, consult the
fault finding procedure
for this status.
NOTE: This status
represents the request from
the injection computer to
the Protection and
Switching Unit to engage
the compressor (refer to the
flowchart in the generaloperation section).
PR089: Vehicle speed. 0 mph (0 km/h) If there is a fault, refer to the
fault finding procedure
for this parameter.
PR055: Engine speed. 800 rpm. If there is a fault, refer to the
fault finding procedure
for this parameter.
ET023: Fast idle request
(except EDC 16
injection).
PRESENT If there is a fault: refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the EDC16
injection (F9Q engine).
PR053: Engine speed
requested by air
conditioning
(except S3000 and
DDCR injections).
800 rpm. If there is a fault, refer to the
fault finding procedure
for this parameter.
NOTE: This parameter is
only displayed by the
EDC16 injection (F9Q
engine).
PR037: Refrigerant
pressure.
1 bar < X < 27 bar If there is a fault, refer to the
fault finding procedure
for this parameter.
PR125: Power absorbed
by air conditioning
compressor.
300 W < X < 5000 W
(ambient temperature
23 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
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62A-33
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 3)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Injection
(continued 2)
ET022: Low speed fan
request (except
3000 injection)
ACTIVE if the refrigerant
fluid pressure is less than
23 bar
INACTIVE otherwise
NOTE: This status is not
displayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).
If there is a fault, refer to the
fault finding procedure
for this status.
For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluid
pressure), refer to the
HELP section (62B).
ET021: High speed fan
request (exceptS3000 injection).
ACTIVE if the refrigerant
fluid pressure is more than23 bar
INACTIVE otherwise
NOTE: This status is not
displayed by the S3000
injection (K4J, K4M, F4R
and F4RT engines).
If there is a fault, refer to the
fault finding procedurefor this status.
For more information
(Control of Fan 1 or
Fan 2 according to
vehicle speed and
refrigerant fluidpressure), refer to the
HELP section (62B).
ET014: Fan unit 1 check
(except DDCRinjection).
RUNNING if the refrigerant
fluid pressure is less than23 bar
OFF otherwise
If there is a fault, refer to the
fault finding procedurefor this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
ET015: Fan unit 2 check
(except DDCR
injection).
RUNNING if the refrigerant
fluid pressure is more than
23 bar
OFF otherwise
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is not
displayed by the DDCR
injection (K9K engine).
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Fault finding - Conformity check 62A
62A-34
Manual air conditioningand
Climate control
Subsystem: cold loop (continued 4)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Protection and
Switching Unit
ET007: High speed fan
control.
INACTIVE
(On Mgane saloons and
sport hatches this status is
always ACTIVE: ignore it).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative on Mgane
Scnics (2 engine cooling
fans and Fan unit 2 relay
outside the UPC).
AC008: Compressor
control.
Command for testing the
operation of the airconditioning compressor
clutch.
If there is a fault, consult the
fault finding procedurefor this command.
NOTE: The UPC cannottest the compressor control
circuit, this command is the
only way to test its
operation.
AC009: Low speed fan
unit.
Command for testing the
low speed operation of theengine cooling fan unit
(Fan 1).
If there is a fault, consult the
fault finding procedurefor this command.
NOTE: The UPC cannot
test the control circuit for
Fan unit 1; this command isthe only way to test its
operation.
AC010: High speed fan
unit
Command for testing the
high speed operation of
the engine cooling fan unit
(Fan 2).
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: On Mgane saloons
and sport hatches the UPC
cannot test the control
circuit for Fan unit 2; this
command is the only way to
test its operation.
On Mgane Scnics, theFan unit 2 control relay is
outside the UPC and its
control line is tested by
(DF002 High speed fan
control relay circuit).
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-35
Manual air conditioningand
Climate control
Subsystem: heating
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed, AIR CONDITIONING OPERATING (air
conditioning compressor engaged).NOTE: The interpretation of the statuses, parameters and controls listed in this check
is explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
ET086: Heated rearscreen: manual
mode.
ACTIVE: De-icing button atthe bottom of the control
panel pressed.
INACTIVE otherwise.
If there is a fault, refer to thefault finding procedure
for this status.
ET085: Heated rear
screen: auto
mode.
ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
PR121: Blown air
temperature
setpoint.
0 < X < 80 C. If there is a fault, refer to the
fault finding procedure
for this parameter.
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C).
If there is a fault, refer to the
fault finding procedure
for this parameter.
PR012: Mixing flap
position.
0% = Max. cold position
(15 C)
100% = Max. warm position
(27 C)
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET141: Passenger
compartment
blower.
RUNNING.
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative forclimate
control systems.
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-36
Manual air conditioningand
Climate control
Subsystem: heating (continued 1)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
PR001: Battery voltage. 12.5 < X < 14.4 volts. If there is a fault, refer to the
fault finding procedure
for this parameter. If the
fault is still present, carry
out fault finding on the
charge circuit.
PR002: Exterior
temperature.
X = exterior temperature
5C
(invalid value: 215 C).
If there is a fault, refer to the
fault finding procedure
for this parameter.
ET025: Retractable roof. CLOSED orNOT CLOSEDABSENT if the vehicle does
not have one.
If there is a fault, refer to thefault finding procedure
for this status.
ET091: Engine running: YES
NOTE: This status is
displayed by the UCH but it
is generated by the injection
computer.
If there is a fault, refer to the
fault finding procedure
for this status.
(Injection Technical Note).
ET015: Passenger
compartment
blower.
ACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning(and heater
versions without air
conditioning).
ET026: Heated rear
screen switch.
ACTIVE if the heated rear
screen is operating.
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET031: Fast idle request
for RCH.
ACTIVE if the RCH are
operating.
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET017: Number RCH
required.
0, 1, 2 or 3 for Mgane
saloons and sport hatches
(1000 watt RCH).
0, 1, 2, 3, 4 or 5 for Mgane
Scnics (1800 watt RCH).
(according to heat
requirement).
If there is a fault, refer to the
fault finding procedure
for this status.
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-37
Manual air conditioningand
Climate control
Subsystem: heating (continued 2)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
(continued 1)
ET018: Number RCH
authorised by
alternator.
0, 1, 2 or 3 for Mgane
saloons and sport hatches
(1000 watt RCH).
0, 1, 2, 3, 4 or 5 for Mgane
Scnics (1800 watt RCH).
(depending on the electrical
availability).
If there is a fault, refer to the
fault finding procedure
for this status.
ET019: Number RCH
authorised by
injection.
0, 1, 2 or 3 for Mgane
saloons and sport hatches
(1000 watt RCH).0, 1, 2, 3, 4 or 5 for Mgane
Scnics (1800 watt RCH).(according to the injection's
requirements: power
requirement, torque
reduction, etc.).
If there is a fault, refer to the
fault finding procedure
for this status.
ET020: Number RCH
actuated.
0, 1, 2 or 3 for Mgane
saloons and sport hatches(1000 watt RCH).
0, 1, 2, 3, 4 or 5 for Mgane
Scnics (1800 watt RCH).
(depending on statuses"ET017, ET018 and
ET019").
If there is a fault, refer to the
fault finding procedurefor this status.
ET021: RCH no. 1 control
relay.
ACTIVE orINACTIVE
(depending on status
ET020).
If there is a fault, refer to the
fault finding procedure
for this status.
ET022: RCH no. 2 control
relay.
ACTIVE orINACTIVE
(depending on status
ET020).
If there is a fault, refer to the
fault finding procedure
for this status .
ET023: RCH no. 3 control
relay (Mgane
Scnic and
Scnic 4x4 only).
ACTIVE orINACTIVE
(depending on status
ET020).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is
inoperative for Mgane
saloons and Mgane sport
hatches.
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Fault finding - Conformity check 62A
62A-38
Manual air conditioningand
Climate control
Subsystem: heating (continued 3)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
(continued 2)
AC016: RCH no. 1 relay. Commands for testing the
operation of the RCH
(passenger compartment
air heating resistors). The
number of RCH stages
switched on depends on the
number of relays actuated.
NOTE: RCH no. 3 relay is
only fitted to Mgane
Scnics.
If there is a fault, refer to the
fault finding procedure
for these controls.
NOTE: To find the relays
actuated/number of RCH
engaged correlation, refer
to the "general operation"
section of the UCH
Technical Note.
AC017: RCH no. 2 relay.
AC018: RCH no. 3 relay.
(Mgane Scnics
only)
Injection
ET024: Set number of
RCH.
YES orNO
NOTE:According to theinjection's requirements:
power requirement, torque
reduction, etc., the injection
computer sets the number
of RCH stages switched on
(no more, no less).
If there is a fault, refer to the
fault finding procedurefor this status.
PR064: Coolant
temperature.
X = engine coolant
temperature.
If there is a fault, refer to the
fault finding procedure
for this parameter.
Protection and
Switching Unit
PR002: alternator charge
signal
0 < X
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-39
Manual air conditioningand
Climate control
Subsystem: user selection
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed, AIR CONDITIONING OPERATING (air
conditioning compressor engaged).NOTE: The interpretation of the statuses, parameters and controls listed in this check
is explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer
(signal generator)
Parameter or status
checked or actionDisplay and Notes Fault finding
Climate control
ET086: Heated rearscreen: manual
mode.
ACTIVE: De-icing button atthe bottom of the control
panel pressed.
INACTIVE otherwise.
If there is a fault, refer to thefault finding procedure
for this status.
ET085: Heated rear
screen: auto
mode.
ACTIVE: De-icing button at
the top of the control panel
pressed ("See clear"
function).
INACTIVE otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
ET143: Air conditioning
request 1.
ACTIVE
NOTE: This status is only
valid forclimate controlsystems.
If there is a fault, refer to the
fault finding procedure
for this status.NOTE: This status
represents the request from
the climate control
computer to the UCH to
engage the compressor
(refer to the flowchart in
the general operation
section).
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-40
Manual air conditioningand
Climate control
Subsystem: user selection (continued)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
UCH
ET029: Air conditioning
button.
PRESSED
(AC button on the manual
air conditioning control
panel pressed).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is only
operative formanual air
conditioning.
ET028: Heated rear
screen button.
PRESSED if the heated
rear screen button on the
air conditioning control
panel is pressed.RELEASED otherwise.
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning(and heaterversions without air
conditioning).
ET015: Passenger
compartment
blower.
ACTIVE
(according to test
conditions: see Notes).
If there is a fault, refer to the
fault finding procedure
for this status.
NOTE: This status is onlyoperative formanual air
conditioning(and heater
versions without air
conditioning).
AC015: Air conditioning
button light.
Command enabling the air
conditioning button light to
be illuminated to check its
operation.
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: This command only
operates formanual air
conditioning.
AC019: Heated rear
screen indicator
light.
Command enabling the
heated rear screen button
light to be illuminated to
check its operation.
If there is a fault, consult the
fault finding procedure
for this command.
NOTE: This command only
operates formanual airconditioning (and heater
versions without air
conditioning).
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-41
Manual air conditioningand
Climate control
Subsystem: passenger compartment ventilation
NOTES
Only carry out this conformity check after a full check with the diagnostic tool (fault
reading and configuration checks).
Test conditions: engine at idle speed, AIR CONDITIONING OPERATING (air
conditioning compressor engaged).NOTE: To check that the temperature parameters are correct (without a thermometer),
read these parameters when the vehicle is cold (in the morning). The temperatures
should be approximately equal (interior, exterior and engine coolant). Fault finding
procedures for the statuses, parameters and commands listed in this check are
explained in the Technical Notes relating to the computer which generates the signal
(see the Introduction section).
Computer(signal generator)
Parameter or statuschecked or action
Display and Notes Fault finding
Climate control
PR019: Passenger
compartment
blower
PWM setpoint.
from 18 % to 100 %.
(18 % corresponds to
speed 1)
NOTE: The "PWM" signal is
a modulated control voltage
used to control the
passenger compartment
blower power module.
If there is a fault or formore
information (to find the
intermediate speed
percentages), refer to the
fault finding procedure
for this parameter.
PR012: Mixing flap
position.
0 % = Max. cold position (15
C)100 % = Max. warm
position (27 C)
If there is a fault, refer to the
fault finding procedurefor this parameter.
ET062: Recirculation flap
position.
OPEN if the flap is in the
outside air position.
CLOSED if the flap is in the
recirculation position.
If there is a fault, refer to the
fault finding procedure
for this status.
PR011: Distribution flap
position.
from 0 % to 100 %.
NOTE:
0 % = Full air vents position
100 % = De-icing position
If there is a fault or formore
information (various flap
opening values according
to the user selection), refer
to the fault findingprocedure for this
parameter.
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AIR CONDITIONING
Fault finding - Conformity check 62A
62A-42
Manual air conditioningand
Climate control
Subsystem: passenger compartment ventilation (continued)
Computer
(signal generator)
Parameter or status
checked or action Display and Notes Fault finding
Climate control
(continued)
PR001: Interior
temperature.
X = interior temperature
5 C
(invalid value: 87.5 C).
If there is a fault, refer to the
fault finding procedure
for this parameter.
PR002: Exterior
temperature.
X = exterior temperature
5 C
(invalid value: 215 C).NOTE: This status is
displayed via the climate
control computer but is
generated by the UCH.
If there is a fault, refer to the
fault finding procedure
for this parameter(UCHTechnical Note).
PR006: Solar radiation. 0 watts (no solar radiation)
to 400 watts (maximumsolar radiation).
If there is a fault, refer to the
fault finding procedurefor this parameter.
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AIR CONDITIONING
Fault finding - Customer complaints 62AManual air conditioning
andClimate control Fault finding - Customer complaints
NOTES
Special notes:
This section gives the complete list of possible customer complaints (the fault finding
charts are to be found in sections 62A, 62B and 62C: see below).
COMMUNICATION FAULT
(only for climate control versions)
Section 62B
NO DIALOGUE WITH THE COMPUTER ALP 1
AIR DISTRIBUTION FAULT Sections 62B and 62C
AIR DISTRIBUTION FAULT ALP 2
AIR FLOW FAULT ALP 3
INEFFICIENT WINDSCREEN DEMISTING ALP 4
NO PASSENGER COMPARTMENT VENTILATION ALP 5
CLIMATE CONTROL FAULT Section 62A
NO HEATING OR INADEQUATE HEATING ALP 6
TOO MUCH HOT AIR ALP 7
NO COLD AIR ALP 8
TOO MUCH COLD AIR ALP 9
INEFFICIENT REAR SCREEN DE-ICING OR DEMISTING ALP 10
ODOUR PROBLEM IN PASSENGER
COMPARTMENT
Sections 62B and 62C
UNPLEASANT ODOURS IN PASSENGER COMPARTMENT ALP 11
WATER IN PASSENGER COMPARTMENT Sections 62B and 62C
WATER PRESENT IN PASSENGER COMPARTMENT ALP 12
CONTROL PANEL FAULT Sections 62B and 62C
NO CONTROL PANEL LIGHTING ALP 13
COMPRESSOR NOISE Section 62A
NOISY COMPRESSOR ALP 14
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AIR CONDITIONING
Fault finding - Fault Finding Chart 62A
62A-44
Manual air conditioningand
Climate control Fault finding - Fault Finding Chart
ALP 6 No heating or inadequate heating
NOTESOnly refer to this customer complaint after a full check with the diagnostic tool
(fault reading and configuration checks).
Is the air flow correct?
YES
Is the air distribution correct?
YES
With the engine warm, select the MAX warm position.
Is the air supplied hot?
NO
Using the diagnostic tool statuses and parameters
screen (cold loop sub-function), check that thetemperature signals are consistent (no sensor drift
resulting in incorrect measurement).
For manual air conditioning systems:
Outside airtemperature and engine coolant
temperature.
For climate control systems:
Outside airtemperature, engine coolant
temperature and interior airtemperature.
Also check that the interior air temperature sensor
micro-turbine is operating correctly (this can falsify the
measurement if it malfunctions).
Are the temperature signals consistent?
YES
NO
NO
YES
NO
See ALP 3, air flow fault.
See ALP 2, air distribution fault.
If necessary, explain how the
system works to the customer
again.
Carry out a conformity check on
the sensors (refer to the relevantsection).
Replace any defective components.
AFTER REPAIR Perform a complete check using the diagnostic tool.
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AIR CONDITIONING
Fault finding - Fault Finding Chart 62A
62A-45
Manual air conditioningand
Climate control
ALP 6
CONTINUED
With the engine warm and
passenger compartment ventilation
operating, vary the position of the
mixing flap from the maximum cold
position to the maximum warm
position and check subjectively that
there is a difference in temperature.
Can you feel the difference intemperature?
YES
NO
For climate control systems:
Carry out a conformity check on the mixing motor
(PR012 mixing motor). If the conformity check does not
reveal any faults, look for a mechanical fault on themixing flap (condition of the motor's toothed sector, flap
jammed inside the unit, etc.).
For manual air conditioning and heater versions:
Check the condition and routing of the mixing flap
control cable. Eliminate any constraints on it: kinks,
cable restricted by plastic clips, etc. Replace it ifnecessary. Unclip the cable from the side of the unit and
check the stiffness of movement of each component:control button and flap control on the air distribution unit.
Check that there is no mechanical fault on the mixing
flap (flap jammed inside the unit, etc.).
Carry out any necessary repairs.
Is the fault still present?
YES
Is the heater matrix lowerpipe
(coolant inlet) hot?
NOTE: pipe located on the left-hand
side of the heater/air conditioning
unit, near the engine compartmentbulkhead.
YES
Check that the heater matrix is not blocked: the heater matrix upperpipe should be hot.
NOTE: pipe located on the left-hand side of the heater/air conditioning unit, near the engine
compartment bulkhead. Clean the heater matrix or replace it if necessary.
Is the fault still present?
YES NO
If the vehicle is fitted with passenger compartment heating
resistors (RCH), check that these are operating correctly by
referring to the fault finding procedure in the UCH Technical Note.
NO
Carry out a check on the coolant circuit and
ensure that the thermostatic valve opens at the
correct temperature.
Replace the valve if necessary.
NO
End of fault finding procedure.