2012 NATEF Task Area A­6 Electrical & Electronic Systems

• 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 A­6 Electrical & Electronic Systems A. 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

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

“Oldie”

NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

“Oldie”

NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

A6.A.2

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

Resistance Ω

Capacitance

Continuity

Diode Tests

Relay Tests

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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.

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

12­volt

Continuity

Logic Probe

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

A6.A.7

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

A6.A.8

PARASITIC DRAIN Check 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.

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

A6.A.9

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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.

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

Repair wiring harness. A6.A.12

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

Heat Sink

Heat Shrink

Rosin Core Solder

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

A6.A.14

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NATEF Task Area A­6 Electrical & Electronic Systems A. General Electrical System Diagnosis

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

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NATEF Task Area A­6 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 A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

Perform battery state­of­charge test; determine necessary action. A6.B.1

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

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

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

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

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

Inspect and clean battery; fill battery cells; check battery cables, connectors, clamps, and hold­downs.

A6.B.4

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

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

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

Inspect & clean battery cables, connectors, clamps, and hold­downs­repair/replace as needed.

Voltage Drop of Negative Cable End

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

Jump­start vehicle using jumper cables and a booster battery or an auxiliary power supply.

A6.B.6

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

Identify high­voltage circuits of electric or hybrid electric vehicle and related safety precautions.

A6.B.7

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

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

A6.B.8

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NATEF Task Area A­6 Electrical & Electronic Systems B. Battery Diagnosis & Service

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

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

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

A6.C.5

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NATEF Task Area A­6 Electrical & Electronic Systems C. Starting System Diagnosis & Repair

Differentiate between electrical and engine mechanical problems that cause a slow­crank or a no­crank condition.

A6.C.6

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NATEF Task Area A­6 Electrical & Electronic Systems D. Charging System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems D. Charging System Diagnosis & Repair

Diagnose (troubleshoot) charging system for causes of undercharge, no­charge, or overcharge conditions.

A6.D.2

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NATEF Task Area A­6 Electrical & Electronic Systems D. Charging System Diagnosis & Repair

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

A6.D.3

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NATEF Task Area A­6 Electrical & Electronic Systems D. Charging System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems D. Charging System Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems E. Lighting Systems Diagnosis & Repair

Diagnose (troubleshoot) the causes of brighter­than­normal, intermittent, dim, or no light operation; determine necessary action.

A6.E.1

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NATEF Task Area A­6 Electrical & Electronic Systems E. Lighting Systems Diagnosis & Repair

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

A6.E.2

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NATEF Task Area A­6 Electrical & Electronic Systems E. Lighting Systems Diagnosis & Repair

Aim headlights. A6.E.3

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NATEF Task Area A­6 Electrical & Electronic Systems E. Lighting Systems Diagnosis & Repair

Identify system voltage and safety precautions associated with high­intensity discharge headlights.

A6.E.4

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NATEF Task Area A­6 Electrical & Electronic Systems E. Lighting Systems Diagnosis & Repair

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

“Oldie”

NATEF Task Area A­6 Electrical & Electronic Systems F. 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

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NATEF Task Area A­6 Electrical & Electronic Systems F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters Inspect and test connectors, wires, and printed circuit boards of gauge circuits; determine necessary action.

“Oldie”

NATEF Task Area A­6 Electrical & Electronic Systems F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters Diagnose (troubleshoot) the causes of incorrect operation of warning devices and other driver information systems; determine necessary action.

A6.F.2

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NATEF Task Area A­6 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 A­6 Electrical & Electronic Systems G. Horn, Wiper and Washer Diagnosis & Repair

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

A6.G.1

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NATEF Task Area A­6 Electrical & Electronic Systems G. Horn, Wiper and Washer Diagnosis & Repair

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

A6.G.2

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NATEF Task Area A­6 Electrical & Electronic Systems G. Horn, Wiper and Washer Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

Diagnose (troubleshoot) incorrect operation of motor­driven accessory circuits; determine necessary action.

A6.H.1

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

“Oldie”

NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.2

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.3

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.4

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.5

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

Remove and reinstall door panel. A6.H.6

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.7

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

Describe the operation of keyless entry/remote­start systems. A6.H.8

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.9

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.11

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

A6.H.12

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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

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NATEF Task Area A­6 Electrical & Electronic Systems H. Accessory Diagnosis & Repair

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 J2534­1 and J2534­2 compliant. What does this mean? The Society of Automotive Engineers (SAE) J2534­1 standard applies for all emissions­related 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 J2534­2 standard applies to vehicles older than 2004 and non­emissions systems. VCI For example, a device compliant to the J2534­2 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

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