Comparison Fault

Comparison fault

Checking components and wiring




- Ignition on
- Activate the read off of the signals from the accelerator pedal (AP) position sensor
- Check that the value for both signals is approximately 8% when the accelerator pedal (AP) is unaffected and approximately 82% when the pedal is fully depressed.
Check the engine control module (ECM) and accelerator pedal (AP) position sensor connectors. Check for contact resistance, play and oxidation.
Check the voltage supply from Engine control module (ECM) #B9 (#B19) to accelerator pedal position sensor #6.
Check the ground lead from engine control module (ECM) terminal #B5 (#B15) to accelerator pedal (AP) position sensor terminal #4.
Check the signal cable between Engine control module (ECM) #B25 (#B35) and accelerator pedal position sensor #2.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- For information about signals, see Signal specification Signal Description / Specification
- To access and replace the accelerator pedal (AP) position sensor, see Accelerator pedal (AP), replacing Service and Repair
- To fault-trace the wiring and terminals, see Checking wiring and terminals Checking Wiring And Terminals.










Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the read off of the signals from the accelerator pedal (AP) position sensor.
Check that the value for both signals is approximately 8% when the accelerator pedal (AP) is unaffected and approximately 82% when the pedal is fully depressed.





Do the values correspond?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking components and wiring

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