Faulty Signal

Faulty signal

Checking the connectors and cables




- Ignition off
- Check the accelerator pedal position sensor and engine control module (ECM) connectors. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #B25 (#B35) and accelerator pedal (AP) position sensor terminal #2 (wiring side). Check for an open-circuit. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.

Hint: With the ignition on, the power supply to the accelerator pedal (AP) position sensor must be approximately 12 V measured between accelerator pedal (AP) position sensor terminals #1 and #3 (wiring side).

Try a new accelerator pedal (AP) position sensor if no fault is found and the fault is permanent.
Remedy as necessary.

Other information:
- Checking wiring and terminals Checking Wiring And Terminals
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals on 5 cylinder engines, see Signal specification Signal Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / Specification
- To access and replace the accelerator pedal (AP) position sensor, see Accelerator pedal (AP), replacing Service and Repair.














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.
- Start the engine
- Read off diagnostic trouble codes (DTCs).
The fault has been remedied if status of the diagnostic trouble code (DTC) is intermittent.





Is the status of the diagnostic trouble code (DTC) intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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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 the connectors and cables

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