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Your Current Vehicle: 2007 Ford Escape

Information and Entertainment System

SECTION 415-00: Information and

Entertainment Systems

2007 Escape/Mariner/Escape Hybrid/Mariner

Hybrid Workshop Manual

DIAGNOSIS AND TESTING Procedure revision date: 09/23/2008

Information and Entertainment System

Special Tool(s)

73III Automotive Meter

105-R0057 or equivalent

Page 1 of 43Repair content for 2007 Ford Escape

9/6/2016http://www.chiltonlibrary.com/lh/Repair/Index/mwellsliF18HSSc3aftfAoSDNaaAOxntSBJ...

Flex Probe Kit

105-R025C or equivalent

Principles of Operation

A fluctuating AC voltage audio signal is sent to the speakers directly from the audio unit

to reproduce sound. The audio unit has a self-diagnostic mode that can be entered by

pressing preset buttons 3 and 6 simultaneously.

Inspection and Verification

1. Verify the customer concern.

2. Visually inspect the following for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical



Mechanical Electrical

• Audio unit

• Antenna or antenna cable

• Speaker mounting/speaker cones

• Radio ignition interference capacitor, radio frequency

interference suppression bond, or radio receiver hood

bonding strap

• Smart junction box

(SJB) fuse(s):

◦ 7 (10A)

◦ 12 (5A)

◦ 16 (15A)

• Battery junction box

(BJB) fuse(s):

◦ 7 (40A)

◦ 15 (20A)

(Hybrid)

◦ 16 (25A)

◦ 21 (40A)

◦ 22 (40A)

(Hybrid)

◦ 23 (40A)

(Hybrid)

• Subwoofer amplifier

• Circuitry

• Audio unit

3. If the concern is visually evident, GO to Symptom Chart.

4. If the concern is not visually evident, proceed to the Speaker Walk-Around Test and

the Audio Unit Self-Diagnostic Mode.

Speaker Walk-Around Test (Except Premium CD6)

NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the

audio unit must be turned on and in the radio tuner mode (AM/FM).

1. To enter the speaker walk-around test, simultaneously press the audio unit preset

buttons 3 and 6.



2. The speaker walk-around test stops at each speaker and applies sound to each

speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio

unit in the following sequence: RF, LF, LR, RR and SUBWOOFER.

3. To exit the speaker walk-around test, turn the ignition switch off, turn the audio unit

off, or press preset button 1 for diagnostics (DIA).

Audio Unit Self-Diagnostic Mode (Except Premium CD6)


audio unit must be turned on and in radio tuner mode (AM/FM).

1. To enter the following tests, press the desired preset button while in the speaker

walk-around test or while in the audio unit self-diagnostic mode.

2. To exit the audio unit self-diagnostic mode, turn the ignition switch or the audio unit

off.

3. If the concern remains and the fault is not detected, GO to Symptom Chart to

continue diagnostics.

4. The self-diagnostic mode has 6 manual tests available:

◦ Preset button 1 = ENTER DIAGNOSTICS. This test enters diagnostics from

the speaker walk-around test. Metrics are available with SEL and ON buttons

indicating time played in AM/FM, media, number of buttons pressed, etc.

◦ Preset button 2 = EEPROM BLOCK STATUS. This test shows the validity of

memory to calibrate the clock, and seek sensitivity.

◦ Preset button 3 = EXIT DIAGNOSTICS.

◦ Preset button 4 = Software configuration level. This test queries each radio

system controller for its software configuration level.

◦ Preset button 5 = DISPLAY TEST. This test lights all the display segments for

five seconds and then turns all segments off.

◦ Preset button 6 = RAM CONTENTS READOUT. To enter these tests, press

preset button 1 while in the speaker walk-around test, then the desired preset

button.

5. To exit the self-diagnostic mode, turn the audio unit or the ignition switch off.



Speaker Walk-Around Test (Premium CD6 Only)



NOTE: To enter the speaker walk-around test or the audio unit self-diagnostic mode, the

audio unit must be turned on and in the tuner mode (AM/FM).

1. To enter the speaker walk-around test, simultaneously press and hold the audio

unit POWER button and the AUTO-S button.

2. The speaker walk-around test stops at each speaker and applies sound to each

speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio

unit in the following sequence: RF, LF, LR and RR.

3. The speaker walk-around test will self cancel.

Audio Unit Self-Diagnostic Mode (Premium CD6 Only)


audio unit must be turned on and in the tuner mode (AM/FM).

1. To enter the following tests, press the desired preset button while in the speaker

walk-around test or while in the audio unit self-diagnostic mode.

2. To exit the audio unit self-diagnostic mode, turn the ignition switch or the audio unit

off.



4. The self-diagnostic mode has 5 manual tests available. To enter each test,

simultaneously press and hold the appropriate buttons as listed below:

Premium CD6 Audio Unit Diagnostic Tests

Test Button Button Function

DISPLAY

TESTPOWER

SEEK

UP

This test lights all the display segments. To exit,

turn the audio unit or the key to the OFF position.

S-METER POWERPreset

2

The VOLUME bar segment lights up to show the

signal strength of the selected station. The stronger

the signal, the more bars light up on the audio unit

display. The tuner knob and preset buttons function

during this test so that the S-METER readings can

be taken from other AM and FM stations.



Test Button Button Function

BEZEL SW

CHECKPOWER CLOCK

While in this diagnostic mode, pressing any of the

audio unit buttons will generate a 3k Hz tone for 100

ms, without activating the function of that button. On

the eject button you will not hear the beep tone,

however any CD present will eject.

ANT-

CONT

CHECK

POWER AM

If there is a software problem within the audio unit,

the antenna can be shut off. This is done

automatically by the audio unit and cannot be done

by the user. In this diagnostic mode, a correctly

functioning audio unit should display ANT-ON.

AMP-

CONT

CHECK

POWER SCAN

If there is a software problem, the audio unit internal

amplifier can be shut off. This is done automatically

by the audio unit and cannot be done by the user. In

this diagnostic mode, a correctly functioning audio

unit should display AMP-ON.

5. To exit the self-diagnostic mode, turn the ignition switch off or the audio unit off.



Audio Unit Diagnostic Trouble Code (DTC) Index

DTC Description Action

B1342 ECU is Defective

CLEAR and DOCUMENT the DTCs. CARRY OUT the self-

test. If DTC B1342 is retrieved again, REMOVE the audio

unit. REFER to Audio Unit in this section. SEND it to an

authorized audio system repair facility. TEST the system for

normal operation after the repair.

B2401Audio Tape Deck

Mechanism Fault

VERIFY that no cassette is inserted in the audio unit. CLEAR

and DOCUMENT the DTCs. CARRY OUT the self-test. If

DTC B2401 is retrieved again, REMOVE the audio unit.

REFER to Audio Unit in this section. SEND it to an





DTC Description Action

B2405

Audio Single-Disc

CD Player

Thermal Shutdown

Fault






B2406

Audio Single-Disc

CD Player Internal

Fault






Symptom Chart

Symptom Chart

Condition Possible Sources Action

• The audio unit display is

blank, but the audio unit

operates

• Audio unit

• REMOVE the audio unit.

REFER to Audio Unit in

this section. SEND it to an

authorized audio system

repair facility. TEST the

system for normal

operation after the repair.

• During CD mode, the audio

unit display shows: NO CD• No CD found

• INSERT a known good CD.

If the concern is still

present, REMOVE the

audio unit. REFER to

Audio Unit in this section.

SEND it to an authorized

audio system repair facility.

TEST the system for

normal operation after the

repair. Otherwise, NOTIFY

the customer of the faulty

CD.




• One or more audio control

buttons (such as volume,

seek, tune, and scan) is

inoperative in either radio,

tape, or all modes, but the

audio unit display functions

correctly

• Audio unit

• REMOVE the audio unit.





system for normal


• When the headlamp switch

is in the PARK or ON

position, there is no front

audio unit backlighting, but

all other backlighting

functions are normal

• Circuitry

• Audio unit

• REFER to Instrument

Cluster and Panel

Illumination to continue

diagnosis of the

backlighting system.

• The audio unit is

inoperative/does not

operate correctly

• Fuse(s)

• Circuitry

• Audio unit

• GO to Pinpoint Test A.




• Poor reception

• Antenna

• Antenna cable

(s)

• Antenna

connections

• Noise

suppression

equipment

• Radio

frequency

interference

suppression

equipment

• Audio unit

• Generator

• Ignition

system

• GO to Pinpoint Test B.




• Continuous SEEK/SCAN in

AM/FM

• Antenna

• Antenna cable

(s)

• Antenna

connections

• Noise

suppression

equipment

• Radio

frequency

interference

suppression

equipment

• Audio unit

• GO to Pinpoint Test B.

• No sound from all speakers

• Fuse(s)

• Circuitry

• Audio unit

• GO to Pinpoint Test A.

• Poor quality/distorted/no

sound from one or more

speakers (not all speakers)

• Circuitry

• Speaker(s)

• Audio unit

• GO to Pinpoint Test C.




• Poor quality/distorted

sound from all speakers• Audio unit

• If the condition only occurs

when the vehicle is

running, GO to Pinpoint

Test B. Otherwise,

REMOVE the audio unit.





system for normal


• The subwoofer is

inoperative

• Fuse

• Circuitry

• Subwoofer

amplifier

• Audio unit

• GO to Pinpoint Test D.

• Loud popping sound when

cycling the ignition

• Circuitry

• Subwoofer

amplifier

• Audio unit

• Smart junction

box (SJB)

• GO to Pinpoint Test E.

Pinpoint Test

Pinpoint Test A: The Audio Unit is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagrams Cell 130 ( Escape/Mariner , Escape Hybrid/Mariner Hybrid ),

Audio System for schematic and connector information.

Normal Operation



The audio unit receives power on circuit 137 (YE/BK) (hot in RUN/ACC) and circuit 956

(OG/LG) (hot at all times). The audio unit is grounded on circuit 694 (BK/LG). A

redundant ground is added on circuit 57 (BK) for all but the CD6 audio systems. With the

ignition switch in the RUN/ACC position, all of the features are operational.

Possible Causes

• Fuse(s)

• Circuit 137 (YE/BK) open

• Circuit 956 (OG/LG) open

• Circuit 694 (BK/LG) open

• Circuit 57 (BK) open

• Audio unit

PINPOINT TEST A: THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE

CORRECTLY

Test Step Result / Action to Take

A1 CHECK THE OPERATION OF THE AUDIO UNIT

• Ignition ON.

• Turn on the audio unit.

• Is the audio unit display illuminated?

Yes

GO to A2.

No

GO to A4.

A2 CHECK FOR SOUND COMING FROM THE AUDIO

SPEAKERS




• Verify that sound is coming from the audio speakers.

• Is there sound coming from the audio speakers?

Yes

GO to A3.

No

If one or more (but not

all) speakers have no

sound, GO to Pinpoint

Test D.

If all the speakers have

no sound, REMOVE the

audio unit. REFER to

Audio Unit in this section.

SEND it to an authorized

audio system repair

facility. TEST the system

for normal operation after

the repair.

A3 CHECK THE AUDIO UNIT CONTROLS AND

FEATURES




• Refer to the Owner's Literature for audio system

controls.

• Verify that the controls and features operate correctly.

• Do the controls and features operate correctly?

Yes

The system is operating

normally at this time.

No

If all of the controls and

features are inoperative,

GO to A4.

If some of the controls

and features are only

partially inoperative,

REMOVE the audio unit.


this section. SEND it to

an authorized audio

system repair facility.

TEST the system for


repair.

A4 CHECK THE VOLTAGE AT THE AUDIO UNIT




• Ignition OFF.

• Disconnect: Audio Unit C240a or C290.

• Ignition ON.

• For CD6 systems, measure the voltage between the

audio unit C240a-1, circuit 956 (OG/LG), harness side

and ground; and between the audio unit C240a-2,

circuit 137 (YE/BK), harness side and ground.

• All others, measure the voltage between the audio unit

C290-9, circuit 956 (OG/LG), harness side and ground;

and between the audio unit C290-10, circuit 137

(YE/BK), harness side and ground.

• Are the voltages greater than 10 volts?

Yes

GO to A5.

No

VERIFY the smart

junction box (SJB) fuse 7

(10A) or fuse 12 (5A) is

OK. If OK, REPAIR the

circuit(s) in question.

TEST the system for

normal operation.

A5 CHECK THE AUDIO UNIT GROUND CIRCUITS FOR

AN OPEN




• Ignition OFF.

• For CD6 systems, measure the resistance between the

audio unit C240a-13, circuit 694 (BK/LG), harness side

and ground.

• For all others, measure the resistance between the

audio unit C290-11, circuit 57 (BK), circuit harness side

and ground; and between the audio unit C290-16,

circuit 694 (BK/LG), harness side

• Are the resistances less than 5 ohms?

Yes

SEND the audio unit to

an authorized audio


TEST the system for


repair.

No

REPAIR the circuit(s) in

question. TEST the

system for normal

operation.

Pinpoint Test B: Poor Reception

Normal Operation

The radio antenna receives AM and FM radio waves. The radio waves are sent to the

audio unit through the radio antenna lead-in cable.



The radio suppression equipment reduces engine ignition and electrical systems

interference transmitted through the speakers. When installing any new radio

suppression equipment components, make sure that a good contact is made at all

connections. Remove any paint or dirt from between a component and its ground.

Tighten all connectors and screws securely according to the torque specifications.

Possible Causes

• Antenna

• Antenna cable(s)

• Noise suppression equipment

• Radio frequency interference suppression equipment

• Audio unit

• Generator

• Ignition system

PINPOINT TEST B: POOR RECEPTION


B1 CHECK THE RECEPTION WITH THE

VEHICLE RUNNING

• Ignition ON.

• Operate the audio unit.

• Start the vehicle.

• Operate the audio unit.

• Does the poor reception only occur

while the vehicle is running?

Yes

GO to B2.

No

GO to B5.

B2 CHECK THE SUPPRESSION

EQUIPMENT/MOUNTING AND

CONNECTING CIRCUITS




• Check all the necessary suppression

equipment and the radio frequency

interference suppression bond.

• Check the radio receiver hood bonding

strap for integrity, cleanliness and

metal-to-metal contact.

• NOTE: The capacitor mounting points

are used to complete the electrical

circuit and must be mounted securely

to clean surfaces.

• Check the mounting and connecting

circuits of the radio ignition

interference capacitor for integrity,

cleanliness and metal-to-metal

contact.

• Are the connections clean, secure,

and in metal-to-metal contact?

Yes

GO to B3.

No

CLEAN, SECURE and INSTALL new

suppression equipment as necessary.

TEST the system for normal operation.

B3 CHECK THE RADIO IGNITION

INTERFERENCE CAPACITOR

• Check the operation of the radio

ignition interference capacitor by

installing a known good component.


• Turn the audio unit on and check the

sound from the speakers.

• Is the noise eliminated?

Yes

INSTALL a new radio ignition interference

capacitor. TEST the system for normal

operation.

No

GO to B4.

B4 CHECK THE GENERATOR




• Ignition OFF.

• Check the generator by disconnecting

the wiring harness from the voltage

regulator.


• Turn the audio unit on and check the

radio reception.

• Is the noise eliminated?

Yes

INSTALL a new generator. REFER to

Generator and Regulator. TEST the

system for normal operation.

No

REPAIR the ignition system as necessary.

REFER to Engine Ignition — 2.3L or

Engine Ignition — 3.0L (4V). TEST the


B5 CHECK THE ANTENNA GROUND

• Measure the resistance between the

antenna base and the battery ground

cable.

• Is the resistance less than 5 ohms?

Yes

GO to B7.

No

GO to B6.

B6 CHECK THE ANTENNA CABLE

CONNECTIONS

• Ignition OFF.

• Check the antenna connections.

• Make sure the antenna is securely

mounted to the vehicle body at ground

points.

• Are the connections clean, secure,

and in metal-to-metal contact?

Yes

GO to B7.

No

CLEAN and SECURE the antenna

connections as needed. TEST the system

for normal operation.

B7 SUBSTITUTE THE ANTENNA




• Substitute a known good antenna.

Ground the antenna base to an

unpainted metal surface on the

vehicle.

• Ignition ON.

• Verify the operation of the audio unit.

• Is the reception normal?

Yes

INSTALL a new antenna. REFER to

Antenna Base in this section. TEST the


No

GO to B8.

B8 SUBSTITUTE THE ANTENNA LEAD-IN

CABLE

• Ignition OFF.

• Substitute a known good antenna

lead-in cable.

• Ignition ON.



Yes

INSTALL a new antenna lead-in cable.

REFER to Antenna Lead-In Cable in this

section. TEST the system for normal

operation.

No

GO to B9.

B9 SUBSTITUTE THE AUDIO UNIT

• Ignition OFF.

• Substitute a known good audio unit.

• Ignition ON.



Yes

SEND the original audio unit to an

authorized audio system repair facility.

TEST the system for normal operation

after the repair.

No

GO to B10.

B10 REPOSITION COMPONENTS




• Ignition OFF.

• Determine if the noise can be

eliminated by repositioning the

antenna extension cable, audio

speaker circuits, or audio unit power

feed circuits away from other circuits

and/or brackets.




Yes

Permanently REPOSITION the

components as needed. TEST the system

for normal operation.

No

GROUND various parts of the vehicle to

the frame using a jumper cable. (For

example: engine, fenders, quarter panels,

stone deflectors, body sheet metal.) When

the noise is eliminated, PROVIDE a

permanent ground where necessary.

TEST the system for normal operation.

Pinpoint Test C: Poor Quality/Distorted/No Sound From One Or More Speakers

(Not All Speakers)



Normal Operation

The audio unit directs the audio signals to the speakers through separate positive and

negative circuits for each of the 4 audio channels: LH front, RH front, LH rear, and RH

rear. The audio unit provides internal circuit protection for shorts to ground, shorts to

voltage, or shorts between any output circuits.

Possible Cause

• Circuit 176 (PK/LG) open, short to ground

• Circuit 179 (OG/RD) open, short to ground

• Circuit 187 (DB/OG) open, short to ground

• Circuit 189 (TN/LB) open, short to ground

• Circuit 800 (GY/LB) open, short to ground

• Circuit 801 (TN/YE) open, short to ground

• Circuit 802 (OG/RD) open, short to ground

• Circuit 803 (BN/PK) open, short to ground

• Circuit 804 (OG/LG) open, short to ground



• Circuit 805 (WH/LG) open, short to ground

• Circuit 811 (DG/OG) open, short to ground

• Circuit 813 (LB/WH) open, short to ground

• Speaker(s)

• Audio unit

PINPOINT TEST C: POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE

SPEAKERS (NOT ALL SPEAKERS)

Test StepResult /

Action to Take

C1 CHECK FOR OTHER CONCERNS



Test StepResult /

Action to Take

NOTE: Prior to and during the removal of any trim panel around a

suspect speaker, check for loose trim panels, water shields or

attachments that might cause rattles near the speaker in question.

Also, check for pinched or broken circuits, loose or incorrect water

shield or trim installation, and foreign material in the speaker

cones once the trim panels are removed.

• Ignition ON.

• Turn on the audio unit and play music.

• Fade/balance to speaker in question.

• Adjust volume as necessary to reproduce poor sound quality.

• Ignition OFF.

• Remove the trim panel for the suspect speaker. Refer to Interior

Trim and Ornamentation.

• Remove the speaker and check for:

• connector integrity.

• debris in the speaker cone.

• Install the speaker, but leave the trim panel off.

• Ignition ON.

• Operate the audio unit in radio tuner (AM/FM) mode.

• Observe the operation of the suspect speaker.

• Is the speaker sound OK?

Yes

INSPECT the

trim panel and

REPAIR as

necessary.

TEST the

system for

normal

operation.

No

GO to C2.

C2 DETERMINE THE VEHICLE OPTION CONTENT



Test StepResult /

Action to Take

• Ignition OFF.

• Is the vehicle equipped with a CD6 audio system?

Yes

For a suspect

tweeter with

the front door

speaker

functioning

correctly,

INSTALL a

new tweeter.

REFER to

Door Speaker

in this section.

TEST the

system for

normal

operation.

All others, GO

to C5.

No

GO to C3.

C3 CHECK FOR AN OPEN OR SHORT TO GROUND IN THE

SUSPECT SPEAKER(S) AND CIRCUITS



Test StepResult /

Action to Take

• Ignition OFF.

• Disconnect: Audio Unit C290.

• NOTE: If all the speakers have poor quality/distorted/no sound,

only a measurement between each circuit and ground needs to be

taken.

• Measure the resistance between each pair of circuits at the audio

unit; and between each pair of circuits and ground as follows:

SpeakerConnector-

PinCircuit

Connector-

PinCircuit

RH front C290-7805

(WH/LG)C290-8

811

(DG/OG)

LH front C290-14804

(OG/LG)C290-15

813

(LB/WH)

RH rear C290-5802

(OG/RD)C290-6

803

(BN/PK)

LH rear C290-12801

(TN/YE)C290-13

800

(GY/LB)

• Are the resistances between each pair of pins between 3.5

and 4.5 ohms, and greater than 10,000 ohms between each

circuit and ground?

Yes

GO to C7.

No

GO to C4.

C4 CHECK THE RESISTANCE IN THE CIRCUITS TO THE SUSPECT

SPEAKER(S)



Test StepResult /

Action to Take

• Disconnect: Suspect Speaker.

• Measure the resistance between the audio unit, harness side and

the suspect speaker, harness side; and between the audio unit,

harness side and ground as follows:

Suspect

Speaker

Audio Unit

Connector-Pin

Speaker

Connector-

Pin

Circuit

RH front C290-7 C612-1 805 (WH/LG)

RH front C290-8 C612-2 811 (DG/OG)

LH front C290-14 C523-1 804 (OG/LG)

LH front C290-15 C523-2 813 (LB/WH)

RH rear C290-5 C802-1 802 (OG/RD)

RH rear C290-6 C802-2 803 (BN/PK)

LH rear C290-12 C702-1801 (TN/YE)/

802 (OG/RD)

LH rear C290-13 C702-2800 (GY/LB)/

803 (BN/PK)

• Are the resistances less than 5 ohms between the audio unit

and the speaker(s), and greater than 10,000 ohms between

the audio unit and ground?

Yes

INSTALL a

new door

speaker.

REFER to

Door Speaker

in this section.

TEST the

system for

normal

operation.

No

REPAIR the

circuit. TEST

the system for

normal

operation.

C5 CHECK THE RESISTANCE IN THE SUSPECT SPEAKER(S) AND

CIRCUITS — CD6 ONLY



Test StepResult /

Action to Take

• Ignition OFF.

• Disconnect: Audio Unit C290a.

• Measure the resistance between each pair of circuits at the audio

unit; and between each pair of circuit and ground as follows:

Suspect

Speaker

Connector-

PinCircuit

Connector-

PinCircuit

RH front

(including

tweeter)

C240a-11805

(WH/LG)C240a-12

811

(DG/OG)

LH front

(including

tweeter)

C240a-8804

(OG/LG)C240a-21

813

(LB/WH)

RH rear C240a-10802

(OG/RD)C240a-23

803

(BN/PK)

LH rear C240a-22800

(GY/LB)C240a-9

801

(TN/YE)

• Are the resistances between each pair of pins between 3.5

and 4.5 ohms for the rear speakers or between 4.5 and 5.5

ohms for the front speakers, and greater than 10,000 ohms

between the audio unit and ground?

Yes

GO to C8.

No

GO to C6.

C6 CHECK FOR OPENS OR SHORTS TO GROUND IN THE

SPEAKER CIRCUITS — CD6 ONLY



Test StepResult /

Action to Take

• Disconnect: Suspected Speaker.

• Measure the resistance between the audio unit or the tweeter

speaker, harness side, and the suspect speaker connector,

harness side; and between the audio unit or tweeter speaker,

harness side and ground as follows:

Suspect

Speaker

Audio Unit

Connector-

Pin

Tweeter

Connector-

Pin

Door

Speaker

Connector-

Pin

Circuit

RH front

tweeterC240a-11 C613-1 —

805

(WH/LG)

RH front


811

(DG/OG)

LH front


804

(OG/LG)

LH front


813

(LB/WH)

RH front

door— C613-3 C612-1

187

(DB/OG)

RH front

door— C613-4 C612-2 189 (TN/LB)

LH front

door— C513-3 C523-1

176

(PK/LG)

LH front

door— C513-4 C523-2

179

(OG/RD)

RH rear C240a-10 — C802-1802

(OG/RD)

RH rear C240a-23 — C802-2803

(BN/PK)

LH rear C240a-9 — C702-1

801

(TN/YE)/

802

(OG/RD)

Yes

INSTALL a

new door

speaker or

tweeter as

necessary.

REFER to

Door Speaker

in this section.

TEST the

system for

normal

operation.

No

REPAIR the

circuit in

question. TEST

the system for

normal

operation.



Test StepResult /

Action to Take

Suspect

Speaker

Audio Unit

Connector-

Pin

Tweeter

Connector-

Pin

Door

Speaker

Connector-

Pin

Circuit

LH rear C240a-22 — C702-2

800

(GY/LB)/

803

(BN/BK)

• Are the resistances between the connectors less than 5

ohms, and greater than 10,000 ohms between each connector

and ground?

C7 CHECK THE AUDIO SIGNAL OUTPUT TO THE SPEAKER WITH

POOR QUALITY/DISTORTED SOUND OR NO SOUND



Test StepResult /

Action to Take

• Connect: Audio Unit C290.

• Ignition ON.


• Measure the AC voltage between pin 1 and pin 2 of the suspect

speaker.

• Is there a fluctuating AC voltage?

Yes

INSTALL a

new door

speaker.

REFER to

Door Speaker

in this section.

TEST the

system for

normal

operation.

No

REMOVE the

audio unit.

REFER to

Audio Unit in

this section.

SEND it to an

authorized

audio system

repair facility.

TEST the

system for

normal

operation after

the repair.

C8 CHECK THE AUDIO SIGNAL OUTPUT TO THE SPEAKER WITH

POOR QUALITY/DISTORTED SOUND OR NO SOUND — CD6 ONLY



Test StepResult /

Action to Take

• For a suspect front door speaker with the tweeter in that door

functioning correctly, connect the tweeter speaker.

• Disconnect: Suspect Speaker(s).

• Connect: Audio Unit C240a.

• Ignition ON.


• For both a suspect tweeter and front door speaker in the same

door, measure the AC voltage between pin 1 and pin 2 harness

side of the suspect tweeter.

• All others, measure the AC voltage between pin 1 and pin 2 of the

suspect speaker.


Yes

For both a

suspect

tweeter and

front door

speaker in the

same door,

INSTALL a

new tweeter.

REFER to

Door Speaker

in this section.

All others,

INSTALL a

new door

speaker.

REFER to

Door Speaker

in this section.

TEST the

system for

normal

operation.

No

For a suspect

front door

speaker with

the tweeter in

that door

functioning

correctly,

INSTALL a

new tweeter.

REFER to

Door Speaker

in this section.



Test StepResult /

Action to Take

TEST the

system for

normal

operation.

For all others,

REMOVE the

audio unit.

REFER to

Audio Unit in

this section.

SEND it to an

authorized

audio system

repair facility.

TEST the

system for

normal

operation after

the repair.

Pinpoint Test D: The Subwoofer is Inoperative



Normal Operation

The subwoofer speaker is powered by a subwoofer amplifier. Circuit 174 (GY/BK) carries

out 2 functions: to turn on the subwoofer amplifier, and to indicate to the audio unit when

the subwoofer output distortion signal reaches a damaging level. The audio unit then

reduces the audio output signal to the subwoofer amplifier. The subwoofer amplifier

receives power on circuit 720 (RD/YE), and ground on circuit 694 (BK/LG).

The subwoofer amplifier can be replaced individually; however, the subwoofer speaker is

only replaceable as an assembly with the enclosure and subwoofer amplifier.

Possible Causes

• Fuse

• Circuit 720 (RD/YE) open



• Circuit 169 (LG/BK) open or short to ground

• Circuit 172 (LB/RD) open or short to ground

• Circuit 174 (GY/BK) open or short to ground

• Circuit 694 (BK/LG) open


• Subwoofer speaker

• Audio unit

PINPOINT TEST D: THE SUBWOOFER IS INOPERATIVE

Test StepResult / Action to

Take

D1 CHECK CIRCUIT 174 (GY/BK) FOR VOLTAGE

• Ignition OFF.

• Disconnect: Subwoofer Amplifier C466.

• Ignition ON.

• Turn the audio unit on.

• Measure the voltage between the subwoofer amplifier C466-1,

circuit 174 (GY/BK), harness side and ground.

• Is the voltage greater than 4.1 volts?

Yes

GO to D2.

No

GO to D7.

D2 CHECK CIRCUIT 720 (RD/YE) FOR VOLTAGE




Take

• Ignition OFF.

• Measure the voltage between the subwoofer amplifier C466-5,

circuit 720 (RD/YE), harness side and ground.

• Is the voltage greater than 10 volts?

Yes

GO to D3.

No

VERIFY the smart

junction box (SJB)

fuse 16 (15A) is

OK. If OK, REPAIR

the circuit. TEST

the system for

normal operation.

D3 CHECK CIRCUIT 694 (BK/LG) FOR AN OPEN

• Measure the resistance between the subwoofer amplifier

C466-2, circuit 694 (BK/LG), harness side and ground.

• Is the resistance less than 5 ohms?

Yes

GO to D4.

No

REPAIR the circuit.

TEST the system

for normal

operation.

D4 CHECK FOR AN OUTPUT SIGNAL FROM THE AUDIO UNIT




Take

• Ignition ON.

• Turn the audio unit on.

• Measure the AC voltage between the subwoofer amplifier

C466-7, circuit 169 (LG/BK), harness side and the subwoofer

amplifier C466-8, circuit 172 (LB/RD), harness side.


Yes

GO to D5.

No

GO to D6.

D5 CHECK THE AMPLIFIER OUTPUT




Take

• Ignition OFF.

• Connect: Subwoofer Amplifier C466.

• Operate the audio unit in radio turner mode.

• Measure the AC voltage by backprobing between the

subwoofer speaker output circuits at the subwoofer amplifier.

• Is a fluctuating AC voltage present?

Yes

INSTALL a new

subwoofer

speaker. REFER to

Speaker Enclosure

in this section.

TEST the system

for normal

operation.

No

INSTALL a new

subwoofer

amplifier. REFER

to Subwoofer

Amplifier in this

section. TEST the

system for normal

operation.

D6 CHECK CIRCUITS 172 (LB/RD) AND 169 (LG/BK) FOR AN

OPEN OR SHORT TO GROUND




Take

• Ignition OFF.

• Disconnect: Audio Unit C290b.

• Measure the resistance between the subwoofer amplifier,

harness side and the audio unit, harness side; and between

the subwoofer amplifier, harness side and ground as follows:

Subwoofer

Amplifier

Connector-Pin

Audio Unit

Connector-Pin or

Ground

Circuit

C466-7 C240b-1 169 (LG/BK)

C466-7 Ground 169 (LG/BK)

C466-8 C240b-2 172 (LB/RD)

C466-8 Ground 172 (LB/RD)

• Is the resistance less than 5 ohms between the

subwoofer amplifier and the audio unit, and greater than

10,000 ohms between the subwoofer amplifier and

ground?

Yes

SEND the audio

unit to an

authorized audio

system repair

facility. TEST the

system for normal

operation after the

repair.

No

REPAIR the circuit.

TEST the system

for normal

operation.

D7 CHECK CIRCUIT 174 (GY/BK) FOR AN OPEN OR SHORT TO

GROUND




Take

• Ignition OFF.

• Disconnect: Audio Unit C240b.

• Measure the resistance between the subwoofer amplifier

C466-1, circuit 174 (GY/BK), harness side and the audio unit

C240b-4, circuit 174 (GY/BK), harness side; and between the

subwoofer amplifier C466-1, circuit 174 (GY/BK), harness side

and ground.

• Is the resistances less than 5 ohms between the

connectors, and greater than 10,000 ohms between the

subwoofer amplifier and ground?

Yes

SEND the audio

unit to an

authorized audio

system repair

facility. TEST the

system for normal

operation after the

repair.

No

REPAIR the circuit.

TEST the system

for normal

operation.

Pinpoint Test E: Loud Popping Sound When Cycling the Ignition



Normal Operation

The start input circuit 1786 (BN/PK) is sent to the audio unit when the ignition switch is

turned to the START position. The audio unit then immediately mutes all speaker

amplifier outputs and the subwoofer amplifier enable circuit output to eliminate the

possibility of speaker pops during engine cranking.

Possible Causes

• Circuit 174 (GY/BK) short to voltage

• Circuit 1786 (BN/PK) short to voltage




• Audio unit

• Smart junction box (SJB)

PINPOINT TEST E: LOUD POPPING SOUND WHEN CYCLING THE IGNITION


E1 CHECK CIRCUIT 1786 (BN/PK) FOR VOLTAGE

• Ignition OFF.

• Disconnect: Starter Relay.


• Hold the key in the START position.

• Measure the voltage between the audio unit, harness

side and ground as follows:

Audio Unit Connector-Pin Circuit

CD6 C240a-15 1786 (BN/PK)

All except CD6 C290-3 1786 (BN/PK)

• Is the voltage greater than 10 volts?

Yes

If equipped with a

subwoofer, GO to E3. For

all others, SEND the audio

unit to an authorized audio


TEST the system for


repair.

No

GO to E2.

E2 CHECK CIRCUIT 1786 (BN/PK) FOR AN OPEN OR

SHORT TO GROUND




• Ignition OFF.

• Disconnect: SJB C2280e.

• Measure the resistance between the audio unit,

harness side and the SJB, harness side; or between

the audio unit, harness side and ground as follows:

Audio Unit

Audio Unit

Connector-

Pin

SJB

Connector-

Pin

Circuit

CD6 C240a-15 C2280e-171786

(BN/PK)

All except

CD6C290 C2280e-17

1786

(BN/PK)

• Is the resistance less than 5 ohms between the

audio unit and the SJB, and greater than 10,000

ohms between the audio unit and ground?

Yes

GO to E5.

No

REPAIR the circuit. TEST

the system for normal

operation.

E3 CHECK THE AUDIO UNIT




• Ignition OFF.

• Disconnect: Subwoofer Amplifier C466.


• Measure the voltage between the subwoofer amplifier

C466-1, circuit 174 (GY/BK), harness side and

ground.

• Is voltage present?

Yes

GO to E4.

No

REMOVE the subwoofer

amplifier. REFER to

Subwoofer Amplifier in this

section. SEND it to an



system for normal


E4 CHECK CIRCUIT 174 (GY/BK) FOR A SHORT TO

VOLTAGE




• Ignition OFF.



• Measure the voltage between the subwoofer amplifier

C466-1, circuit 174 (GY/BK), harness side and

ground.

• Is any voltage present?

Yes

REPAIR the circuit. TEST


operation.

No

SEND the audio unit to an



system for normal


E5 CHECK FOR CORRECT SJB OPERATION

• Disconnect all the SJB connectors.

• Check for:

• corrosion

• damaged pins

• pushed-out pins

• Connect all the SJB connectors and make sure they

seat correctly.

• Operate the system and verify the concern is still

present.

• Is the concern still present?

Yes

INSTALL a new SJB.

REFER to Multifunction

Electronic Modules. TEST


operation.

No

The system is operating

correctly at this time. The

concern may have been

caused by a loose or

corroded connector.

CLEAR any DTCs.

REPEAT the self-test.



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information and entertainment system · 2016. 9. 6. · 2007 escape/mariner/escape hybrid/mariner...

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