Signal Outside Its Permitted Range

Signal outside its permitted range

Checking the connectors








- Ignition off
- Check the connectors for the brake control module (BCM) and the pedal position sensor. Check for contact resistance. Check for oxidation
- Reinstall the components, connectors, etc.
- Connect the breakout box
- Ignition on
- Read off the signal from the pedal position sensor.
Depress the brake pedal. Check that the pedal signal is updated.

Other information
- Connecting the breakout box Connecting the Breakout Box, Brake Control Module (BCM)
- Checking wiring and terminals Checking Wiring and Terminals





Was the signal updated?

Yes - Troubleshooting procedure complete

No - Checking the wiring and sensors

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Checking the wiring and sensors
Check the wiring between the pedal position sensor:
- terminal #1 and brake control module (BCM) terminal #22 (#A22)
- terminal #2 and brake control module (BCM) terminal #21 (#A21)
- terminal #3 and brake control module (BCM) terminal #3 (#A3).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.

Hint: Connect an ohmmeter between terminals #2 and #3 on the pedal position sensor connector.
The resistance must be approximately 0.5 kohms with the brake pedal unaffected and approximately 2.5-3 kohms when the brake pedal is depressed.

Connect an ohmmeter between terminals #1 and #3 on the pedal position sensor connector.
The resistance must be approximately 2.5-3 kohms with the brake pedal unaffected and approximately 0.5 kohms with depressed brake pedal.

Replace the pedal position sensor if the resistance is incorrect.

Replace the pedal position sensor if no fault is found.

Other information
- Connecting the breakout box Connecting the Breakout Box, Brake Control Module (BCM)
- Position sensor, brake pedal Service and Repair
- Signal description with DSTC Signal Description with DSTC
- Checking wiring and terminals Checking Wiring and Terminals









Continue - Verification

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Verification




Verification

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








- Ignition off
- Reconnect the connectors, components, etc.
- Ignition on
- Read off the status of the stop lamp switch or the value of the pedal position sensor.
Depress and release the brake pedal. The status must switch between OFF and ON and the value must change.





Does the value change?

Yes - Troubleshooting procedure complete

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the connectors

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