On-board diagnostics (OBD) is an automotive term referring to a vehicle's self-diagnostic and reporting capability. OBD systems give the vehicle owner or repair technician access to the status of the various vehicle sub-systems. . The quiz below is set to help drivers and mechanics better understand how the system works. Take advantage and learn. Enjoy!
The owner's manual
Diagnostic trouble codes (DTCs) and customer information
The service manual
Technical service bulletins
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Discreet wiring
A controlled area network bus (CAN-bus)
A scan tool
A personal computer (PC)
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Aftermarket service manuals.
Original equipment manufacturer (OEM) diagnostic flow charts.
Aftermarket training manuals.
OEM owners' manuals.
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An oscilloscope
A scanner
A graphing calculator
A power probe
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1973
1981
1975
1996
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Vehicle start-up.
Vehicle acceleration.
Vehicle cruise.
Vehicle cold soak.
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Electronic brake control module (EBCM).
Transmission control module (TCM).
Power train control module (PCM).
Body control module (BCM).
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Carbon monoxide (CO).
Hydrocarbons (HCs).
Particulate matter (PM).
Oxygen (O2).
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System.
Year.
Make.
Model.
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P0402
U0021
B0092
C0035
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An emissions related fault.
A broken “hard part.”
A broken “hard part.”
An illuminated malfunction indicator lamp (MIL).
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Malfunction indicator lamp (MIL).
Data link connector (DLC).
Diagnostic trouble code (DTC).
Power train control module (PCM).
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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Control circuit.
Mother board.
Mechanical linkage.
Driven component.
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Exhaust system.
Power door lock wiring.
HVAC system.
Interior lighting system.
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A monitor has run and failed.
A monitor has run and is pending.
One monitor has not run.
Two monitors have not run.
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Ignition system.
Exhaust system..
Taillight circuit.
Transmission
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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It flunks a safety inspection.
Its registration has expired.
A red light is illuminated on the instrument panel.
Its malfunction indicator lamp (MIL) is illuminated.
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Contribute to major emissions failures.
Cause a safety related problem.
Cause an inconvenience for the driver.
Cause other systems to fail.
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Work more efficiently.
Determine exactly where faults exist.
Take the guesswork out of diagnosing vehicle problems.
Access data for today's sophisticated vehicles.
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
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Aluminum wiring
Shared circuits
High-voltage circuits
Controller area networks
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A test light.
A digital volt-ohmmeter (DVOM).
A lab scope.
A scan tool.
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Volatile organic compounds (VOCs)
Hydrocarbons (HCs)
Carbon monoxide (CO)
Particulate matter (PM)
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Technical service bulletin (TSB) data
Diagnostic trouble code (DTC) data
Service manual data
Freeze-frame data
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