Download NATEF Task Area A-6 Electrical & Electronic Systems

2013 NATEF Task Area A-6
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
7-2013
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.1
P-1
Research applicable vehicle and service information, vehicle service history,
service precautions, and technical service bulletins.
http://www.rsandas.com/
Amazing Automotive Electrical Site
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
“Oldie” Complete work order to include customer information, vehicle identifying
information, verify customer concern, related service history, cause, & correction.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
“Oldie” Identify & interpret electrical/electronic system concern; determine necessary
action.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
“Oldie” Locate and interpret vehicle and major component identification numbers (VIN,
vehicle certification labels, calibration decals).
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.2
P-1
Demonstrate knowledge of electrical/electronic series, parallel, and series-parallel
circuits using principles of electricity (Ohm’s Law).
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.3
P-1
Demonstrate proper use of a digital multimeter (DMM) when measuring source
voltage, voltage drop (including grounds), current flow and resistance.
Open Circuit Voltage
Voltage Available
Voltage Drop
DC Amps - In Series
DC Amps - Inductive
& Shunt
Resistance Ω
Capacitance
Continuity
Diode Tests
Relay Tests
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.4
P-1
Demonstrate knowledge of the causes and effects from shorts, grounds, opens, and
resistance problems in electrical/electronic circuits.
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.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.5
Check operation of electrical circuits with a test light.
P-1
12-volt
Continuity
Logic Probe
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.6
P-1
Check operation of electrical circuits with fused jumper wires.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.7
P-1
Use wiring diagrams during the diagnosis (troubleshooting) of electrical/electronic
circuit problems.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.8
P-1
Diagnose the cause(s) of excessive key-off battery drain (parasitic draw);
determine necessary action.
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.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.9
P-1
Inspect and test fusible links, circuit breakers, and fuses; determine necessary
action.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.10 Inspect and test switches, connectors, relays, solenoid solid state devices, and wires
P-1
of electrical/electronic circuits; determine necessary action.
If the control coil is energized,
Then the motor feed contacts close.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.11 Replace electrical connectors and terminal ends.
P-1
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.12 Repair wiring harness.
P-3
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.13 Perform solder repair of electrical wiring.
P-1
Heat Shrink
Rosin Core Solder
Heat Sink
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.14 Check electrical/electronic circuit waveforms; interpret readings and determine
P-2
needed repairs.
NATEF Task Area A-6 Electrical & Electronic Systems
A. General Electrical System Diagnosis
A6.A.15 Repair wiring harness (including CAN/BUS systems).
P-1
NATEF Task Area A-6 Electrical & Electronic Systems
•A. General Electrical System Diagnosis
“Oldie” Identify location of hybrid vehicle high voltage circuit disconnect (service plug)
location and safety procedures.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.1
P-1
Perform battery state-of-charge test; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.2
P-1
Confirm proper battery capacity for vehicle application; perform battery capacity
test; determine necessary action.
2 CCA per Cubic Inch
2 CCA per 16 cc’s
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.3
P-1
Maintain or restore electronic memory functions.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.4
P-1
Inspect and clean battery; fill battery cells; check battery cables, connectors,
clamps, and hold-downs.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.5
P-1
Perform slow/fast battery charge according to manufacturer’s recommendations.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
“Oldie” Inspect & clean battery cables, connectors, clamps, and hold-downs-repair/replace
as needed.
Voltage Drop of Negative Cable End
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.6
P-1
Jump-start vehicle using jumper cables and a booster battery or an auxiliary
power supply.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.7
P-3
Identify high-voltage circuits of electric or hybrid electric vehicle and related
safety precautions.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.8
P-1
Identify electronic modules, security systems, radios, and other accessories that
require re-initialization or code entry after reconnecting vehicle battery.
NATEF Task Area A-6 Electrical & Electronic Systems
B. Battery Diagnosis & Service
A6.B.9
P-3
Identify hybrid vehicle auxiliary (12v) battery service, repair, and test procedures.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.1
P-1
Perform starter current draw tests; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.2
P-1
Perform starter circuit voltage drop tests; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.3
P-2
Inspect and test starter relays and solenoids; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.4
P-1
Remove and install starter in a vehicle.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.5
P-2
Inspect and test switches, connectors, and wires of starter control circuits;
determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
C. Starting System Diagnosis & Repair
A6.C.6
P-2
Differentiate between electrical and engine mechanical problems that cause a
slow-crank or a no-crank condition.
NATEF Task Area A-6 Electrical & Electronic Systems
D. Charging System Diagnosis & Repair
A6.D.1
P- 1
Perform charging system output test; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
D. Charging System Diagnosis & Repair
A6.D.2
P-1
Diagnose (troubleshoot) charging system for causes of undercharge, no-charge, or
overcharge conditions.
NATEF Task Area A-6 Electrical & Electronic Systems
D. Charging System Diagnosis & Repair
A6.D.3
P-1
Inspect, adjust, or replace generator (alternator) drive belts; check pulleys and
tensioners for wear; check pulley and belt alignment.
NATEF Task Area A-6 Electrical & Electronic Systems
D. Charging System Diagnosis & Repair
A6.D.4
P-1
Remove, inspect, and re- install generator (alternator).
NATEF Task Area A-6 Electrical & Electronic Systems
D. Charging System Diagnosis & Repair
A6.D.5
Perform charging circuit voltage drop tests; determine necessary action.
P-1
Typical Maximum Voltage Drop
allowed in a wire, splice, switch:
.1 to .2 Volts
NATEF Task Area A-6 Electrical & Electronic Systems
E. Lighting Systems Diagnosis & Repair
A6.E.1
P-1
Diagnose (troubleshoot) the causes of brighter-than-normal, intermittent, dim, or
no light operation; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
E. Lighting Systems Diagnosis & Repair
A6.E.2
P-1
Inspect interior and exterior lamps and sockets including headlights and auxiliary
lights (fog lights/driving lights); replace as needed.
NATEF Task Area A-6 Electrical & Electronic Systems
E. Lighting Systems Diagnosis & Repair
A6.E.3
P-2
Aim headlights.
NATEF Task Area A-6 Electrical & Electronic Systems
E. Lighting Systems Diagnosis & Repair
A6.E.4
P-2
Identify system voltage and safety precautions associated with high-intensity
discharge headlights.
NATEF Task Area A-6 Electrical & Electronic Systems
E. Lighting Systems Diagnosis & Repair
“Oldie” Inspect and diagnose incorrect turn signal, brake, park or hazard light operation;
perform necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters
A6.F.1
P-1
Inspect and test gauges and gauge sending units for causes of abnormal gauge
readings; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters
“Oldie” Inspect and test connectors, wires, and printed circuit boards of gauge circuits;
determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters
A6.F.2
P-3
Diagnose (troubleshoot) the causes of incorrect operation of warning devices and
other driver information systems; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
•F. Gauges, Warning Devices, Driver Information Systems, Instrument Clusters
“Oldie” Inspect and test sensors, connectors, and wires of electronic (digital) instrument
circuits; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
G. Horn, Wiper and Washer Diagnosis & Repair
A6.G.1
P-1
Diagnose (troubleshoot) causes of incorrect horn operation; perform necessary
action.
NATEF Task Area A-6 Electrical & Electronic Systems
G. Horn, Wiper and Washer Diagnosis & Repair
A6.G.2
P-2
Diagnose (troubleshoot) causes of incorrect wiper operation; diagnose wiper speed
control and park problems; perform necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
G. Horn, Wiper and Washer Diagnosis & Repair
A6.G.3
P-2
Diagnose (troubleshoot) windshield washer problems; perform necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.1
P-2
Diagnose (troubleshoot) incorrect operation of motor-driven accessory circuits;
determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
“Oldie” Diagnose incorrect heated glass, mirror or seat operation; determine necessary
action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.2
P-2
Diagnose (troubleshoot) incorrect electric lock operation (including remote keyless
entry); determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.3
P-3
Diagnose (troubleshoot) incorrect operation of cruise control systems; determine
necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.4
P-2
Diagnose (troubleshoot) supplemental restraint system (SRS) problems; determine
necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.5
P-1
Disable and enable an airbag system for vehicle service; verify indicator lamp
operation.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.6
P-1
Remove and reinstall door panel.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.7
P-2
Check for module communication errors (including CAN/BUS systems) using a
scan tool.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.8
P-3
Describe the operation of keyless entry/remote-start systems.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.9
P-1
Verify operation of instrument panel gauges and warning/indicator lights; reset
maintenance indicators.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.10
P-1
Verify windshield wiper and washer operation, replace wiper blades.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.11
P-3
Diagnose (troubleshoot) radio static and weak, intermittent, or no radio
reception; determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.12
P-3
Diagnose (troubleshoot) body electronic system circuits using a scan tool;
determine necessary action.
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.13 Diagnose the cause(s) of false, intermittent, or no operation of anti-theft systems.
P-3
NATEF Task Area A-6 Electrical & Electronic Systems
H. Accessory Diagnosis & Repair
A6.H.14
P-3
Perform software transfers, software updates, or flash reprogramming on
electronic modules.
http://www.youtube.com/watch?v=f90RWeLZEDI
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.