2013 natef task area a-6 electrical & electronic systems 7-2013 a. general electrical system...

2013 NATEF Task Area A-6 Electrical & Electronic Systems7-2013

• A. General Electrical System Diagnosis

• B. Battery Diagnosis & Service

• C. Starting System Diagnosis & Repair

• D. Charging System Diagnosis & Repair

• E. Lighting System Diagnosis & Repair

• F. Gauges, Warning Devices, Instrument Cluster D & R

• G. Horn, Wiper and Washer Diagnosis & Repair

• H. Accessory Diagnosis & Repair

NATEF Task Area A-6 Electrical & Electronic SystemsA. General Electrical System Diagnosis

Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins.

A6.A.1

http://www.rsandas.com/

Amazing Automotive Electrical Site

P-1


Complete work order to include customer information, vehicle identifying information, verify customer concern, related service history, cause, & correction.

“Oldie”


Identify & interpret electrical/electronic system concern; determine necessary action.

“Oldie”


Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals).

“Oldie”


Demonstrate knowledge of electrical/electronic series, parallel, and series-parallel circuits using principles of electricity (Ohm’s Law).

A6.A.2

P-1


Demonstrate proper use of a digital multimeter (DMM) when measuring source voltage, voltage drop (including grounds), current flow and resistance.

A6.A.3

Open Circuit Voltage

Voltage Available

Voltage Drop

DC Amps - In Series

DC Amps - Inductive & ShuntResistance Ω

Capacitance

Continuity

Diode Tests

Relay Tests

P-1


Demonstrate knowledge of the causes and effects from shorts, grounds, opens, and resistance problems in electrical/electronic circuits.

A6.A.4

A short circuit is simply a low resistance connection between the two conductors

supplying electrical power to any circuit. This results in excessive current flow in the power source through the 'short,' and may

even cause the power source to be destroyed. If a fuse is in the supply circuit, it will do its

job and blow out, opening the circuit and stopping the current flow.

P-1


Check operation of electrical circuits with a test light.A6.A.5

12-volt

Continuity

Logic Probe

P-1


Check operation of electrical circuits with fused jumper wires.A6.A.6

P-1


Use wiring diagrams during the diagnosis (troubleshooting) of electrical/electronic circuit problems.

A6.A.7

P-1


Diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine necessary action.

A6.A.8

PARASITIC DRAINCheck for excessive battery drain or

parasitic loads using an ammeter. Make sure all electrical loads are off in the car, doors

closed, and the key is out of the ignition switch . Disconnect one of the battery cables

from the battery, placing an ammeter in series between the battery post and cable

clamp. The current draw reading should be less than 35 milliamps. A reading higher

than this (or manufacturer specifications) would indicate excessive battery drain.

Something is "on", allowing current to flow running down the battery. Vehicles today typically will draw less than .020 amps (20

milliamps) of current to maintain electronic memories and circuits.

P-1


Inspect and test fusible links, circuit breakers, and fuses; determine necessary action.

A6.A.9

P-1


Inspect and test switches, connectors, relays, solenoid solid state devices, and wires of electrical/electronic circuits; determine necessary action.

A6.A.10

If the control coil is energized,Then the motor feed contacts close.

P-1


Replace electrical connectors and terminal ends.A6.A.11

P-1


Repair wiring harness.A6.A.12

P-3


Perform solder repair of electrical wiring.A6.A.13

Heat Sink

Heat Shrink

Rosin Core Solder

P-1


Check electrical/electronic circuit waveforms; interpret readings and determine needed repairs.

A6.A.14

P-2


Repair wiring harness (including CAN/BUS systems).A6.A.15

P-1

NATEF Task Area A-6 Electrical & Electronic Systems•A. General Electrical System Diagnosis

Identify location of hybrid vehicle high voltage circuit disconnect (service plug) location and safety procedures.

“Oldie”

NATEF Task Area A-6 Electrical & Electronic SystemsB. Battery Diagnosis & Service

Perform battery state-of-charge test; determine necessary action.A6.B.1

P-1


Confirm proper battery capacity for vehicle application; perform battery capacity test; determine necessary action.

A6.B.2

2 CCA per Cubic Inch

2 CCA per 16 cc’s

P-1


Maintain or restore electronic memory functions.A6.B.3

P-1


Inspect and clean battery; fill battery cells; check battery cables, connectors, clamps, and hold-downs.

A6.B.4

P-1


Perform slow/fast battery charge according to manufacturer’s recommendations.A6.B.5

P-1


Inspect & clean battery cables, connectors, clamps, and hold-downs-repair/replace as needed.

Voltage Drop of Negative Cable End

“Oldie”


Jump-start vehicle using jumper cables and a booster battery or an auxiliary power supply.

A6.B.6

P-1


Identify high-voltage circuits of electric or hybrid electric vehicle and related safety precautions.

A6.B.7

P-3


Identify electronic modules, security systems, radios, and other accessories that require re-initialization or code entry after reconnecting vehicle battery.

A6.B.8

P-1


Identify hybrid vehicle auxiliary (12v) battery service, repair, and test procedures.A6.B.9

P-3

NATEF Task Area A-6 Electrical & Electronic SystemsC. Starting System Diagnosis & Repair

Perform starter current draw tests; determine necessary action.A6.C.1

P-1


Perform starter circuit voltage drop tests; determine necessary action.A6.C.2

P-1


Inspect and test starter relays and solenoids; determine necessary action.A6.C.3

P-2


Remove and install starter in a vehicle.A6.C.4

P-1


Inspect and test switches, connectors, and wires of starter control circuits; determine necessary action.

A6.C.5

P-2


Differentiate between electrical and engine mechanical problems that cause a slow-crank or a no-crank condition.

A6.C.6

P-2

NATEF Task Area A-6 Electrical & Electronic SystemsD. Charging System Diagnosis & Repair

Perform charging system output test; determine necessary action.A6.D.1

P- 1


Diagnose (troubleshoot) charging system for causes of undercharge, no-charge, or overcharge conditions.

A6.D.2

P-1


Inspect, adjust, or replace generator (alternator) drive belts; check pulleys and tensioners for wear; check pulley and belt alignment.

A6.D.3

P-1


Remove, inspect, and reinstall generator (alternator).A6.D.4

P-1


Perform charging circuit voltage drop tests; determine necessary action.A6.D.5

P-1

Typical Maximum Voltage Drop allowed in a wire, splice, switch:

.1 to .2 Volts

NATEF Task Area A-6 Electrical & Electronic SystemsE. Lighting Systems Diagnosis & Repair

Diagnose (troubleshoot) the causes of brighter-than-normal, intermittent, dim, or no light operation; determine necessary action.

A6.E.1

P-1


Inspect interior and exterior lamps and sockets including headlights and auxiliary lights (fog lights/driving lights); replace as needed.

A6.E.2

P-1


Aim headlights.A6.E.3

P-2


Identify system voltage and safety precautions associated with high-intensity discharge headlights.

A6.E.4

P-2


Inspect and diagnose incorrect turn signal, brake, park or hazard light operation; perform necessary action.

“Oldie”

NATEF Task Area A-6 Electrical & Electronic SystemsF. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters

Inspect and test gauges and gauge sending units for causes of abnormal gauge readings; determine necessary action.

A6.F.1

P-1


Inspect and test connectors, wires, and printed circuit boards of gauge circuits; determine necessary action.

“Oldie”


Diagnose (troubleshoot) the causes of incorrect operation of warning devices and other driver information systems; determine necessary action.

A6.F.2

P-3

NATEF Task Area A-6 Electrical & Electronic Systems•F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters

Inspect and test sensors, connectors, and wires of electronic (digital) instrument circuits; determine necessary action.

“Oldie”

NATEF Task Area A-6 Electrical & Electronic SystemsG. Horn, Wiper and Washer Diagnosis & Repair

Diagnose (troubleshoot) causes of incorrect horn operation; perform necessary action.

A6.G.1

P-1


Diagnose (troubleshoot) causes of incorrect wiper operation; diagnose wiper speed control and park problems; perform necessary action.

A6.G.2

P-2


Diagnose (troubleshoot) windshield washer problems; perform necessary action.A6.G.3

P-2

NATEF Task Area A-6 Electrical & Electronic SystemsH. Accessory Diagnosis & Repair

Diagnose (troubleshoot) incorrect operation of motor-driven accessory circuits; determine necessary action.

A6.H.1

P-2


Diagnose incorrect heated glass, mirror or seat operation; determine necessary action.

“Oldie”


Diagnose (troubleshoot) incorrect electric lock operation (including remote keyless entry); determine necessary action.

A6.H.2

P-2


Diagnose (troubleshoot) incorrect operation of cruise control systems; determine necessary action.

A6.H.3

P-3


Diagnose (troubleshoot) supplemental restraint system (SRS) problems; determine necessary action.

A6.H.4

P-2


Disable and enable an airbag system for vehicle service; verify indicator lamp operation.

A6.H.5

P-1


Remove and reinstall door panel.A6.H.6

P-1


Check for module communication errors (including CAN/BUS systems) using a scan tool.

A6.H.7

P-2


Describe the operation of keyless entry/remote-start systems.A6.H.8

P-3


Verify operation of instrument panel gauges and warning/indicator lights; reset maintenance indicators.

A6.H.9

P-1


Verify windshield wiper and washer operation, replace wiper blades.A6.H.10

P-1


Diagnose (troubleshoot) radio static and weak, intermittent, or no radio reception; determine necessary action.

A6.H.11

P-3


Diagnose (troubleshoot) body electronic system circuits using a scan tool; determine necessary action.

A6.H.12

P-3


Diagnose the cause(s) of false, intermittent, or no operation of anti-theft systems.A6.H.13

P-3


Perform software transfers, software updates, or flash reprogramming on electronic modules.

A6.H.14

2534 Reprogramming for General Motor/GM Vehicles can be preformed with the Pegisys PC and the Vehicle Communications Interface (VCI) hardware is J2534-1 and J2534-2 compliant. What does this mean? The Society of Automotive Engineers (SAE) J2534-1 standard applies for all emissions-related systems on 2004 and newer vehicles. The California Air Resources Board (ARB) and the U.S. Environmental Protection Agency (EPA) have both passed legislation mandating vehicle manufacturers comply with the standard. SAE J2534-2 standard applies to vehicles older than 2004 and non-emissions systems. VCI For example, a device compliant to the J2534-2 is required if you want to reprogram all the supported General Motors controllers and those vehicle older than 2004. The Pegisys PC tool and VCI provide two tools in one and offer a high end diagnostic tool with a connection to the car and Internet capability and a J2534 compliant device for vehicle reprogramming.

http://www.youtube.com/watch?v=f90RWeLZEDI

P-3

2013 natef task area a-6 electrical & electronic systems 7-2013 a. general electrical system...

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