Faulty Signal

Faulty signal

Checking the connectors








- Ignition off
- Check the connectors for the brake control module (BCM) and pedal position sensor. Check for contact resistance. Check for oxidation
- Reinstall the components, connectors, etc.
- Ignition on.
Test drive the car according to: Test Drive Form (DSTC (dynamic stability and traction control) /brake control module), description Test Drive Form (DSTC (Dynamic Stability and Traction Control) /Brake Control Module), Description
Read off the status of the diagnostic trouble code (DTC).

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





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

Yes - Troubleshooting procedure complete

No - Checking the wiring and component

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Checking the wiring and component
Check the wiring between 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.
Check the pedal position sensor as follows
- ignition off,
- breakout box connected to the wiring,
- brake control module (BCM) disconnected.
measure the resistance at the pedal position sensor.
The resistance between terminals #3 (#A3) and #21 (#A21) must be approximately 0.5 kohms when the brake pedal is unaffected. The resistance must increase when the brake pedal is pressed.
The resistance between terminals #3 (#A3) and #22 (#A22 must be approximately 2.5 kohms when the brake pedal is unaffected. The resistance must decrease when the brake pedal is pressed.
Replace the pedal position sensor if the resistance is incorrect.
Remedy as necessary.

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









Was a fault detected?

Yes - Verification

No - Information

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Verification




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








- Ignition off
- Reconnect the connectors, components, etc.
- Test drive the car according to: Test Drive Form (DSTC (dynamic stability and traction control) /brake control module), description Test Drive Form (DSTC (Dynamic Stability and Traction Control) /Brake Control Module), Description
- Ignition on.
Read off the status of the diagnostic trouble code (DTC).





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

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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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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Information

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.

Do you want to terminate fault-tracing at this time?

Yes - Exit Fault-Tracing

No - Attempt New Test

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