Signal Missing

Signal missing

Checking for contact resistance and oxidation




- Ignition off
- Check the connectors for the brake control module (BCM) and the active yaw control sensor. Check for contact resistance and oxidation
- Ignition on
- Test drive. See 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 diagnostic trouble codes (DTCs).
If the status of the diagnostic trouble code (DTC) is intermittent, the cause of the fault was probably contact resistance or oxidation in the connectors for the control module or the active yaw control sensor.

Other information
- To access the control module connector, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM)
- To access the active yaw control sensor, see Active yaw control sensor, replacing Active Yaw Control Sensor, Replacing
- Checking wiring and terminals Checking Wiring And Terminals.





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

Yes - Fault Found

No - Checking the wiring

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Checking the wiring




- Ignition off.
Check the wiring between the active yaw control sensor:
- terminal #1 and control module terminal #25 (terminal #A25)
- terminal #2 and control module terminal #29 (terminal #A29)
- terminal #3 and control module terminal #6 (#A6)
- terminal #5 and control module terminal #39 (terminal #A39).
check for an open-circuit.
Also check that the active yaw control sensor is correctly installed and that the bracket is secured.
Replace the active yaw control sensor if the wiring is OK and the sensor is correctly installed.

Other information
- To connect the breakout box, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM)
- To access and replace the active yaw control sensor, see Active yaw control sensor, replacing Active Yaw Control Sensor, Replacing
- For information about signals, see Signal specification, brake control module (BCM) with DSTC (dynamic stability and traction control) Signal Specification
- 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
- Reconnect the connectors, reinstall components etc.
- Test drive the car. See 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 - 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 for contact resistance and oxidation

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