Faulty Signal

Faulty signal

Checking the component and wiring




- Ignition on.
Activate the read off for the signals for the brake pedal position and stop lamp switch.
Check that the value at the brake pedal position is approximately 0 % when the brake pedal is unaffected and approximately 55 % when the pedal is fully depressed with the engine running.
Also check that the stop lamp switch activates when the pedal is depressed.
Check the brake pedal position sensor's and engine control module (ECM) connector for contact resistance, loose connection and oxidation.

Hint: The brake pedal position sensor signal is sent to the engine control module (ECM) from the brake control module (BCM) via CAN.

Check that the stop lamp switch is correctly installed.
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 brake pedal position sensor, see Pedal sensor power brake booster, replacing Service and Repair
- To access or replace the stop lamp switch, see Stop lamp switch, replacing Service and Repair
- To fault-trace the wiring and terminals, see Checking wiring and terminals Checking Wiring And Terminals.





Välj Fortsätt.

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 for the signals for the brake pedal position and stop lamp switch.
Check that the value at the brake pedal position is approximately 0 % when the brake pedal is unaffected and approximately 55 % when the pedal is fully depressed with the engine running.
Also check that the stop lamp switch activates when the pedal is depressed.

Hint: The brake pedal position sensor signal is sent to the engine control module (ECM) from the brake control module (BCM) via CAN.





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 the component and wiring

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