Internal Fault

Internal fault

Checking the present value of the sensors




- 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
- Read off the present value.
Check the read off value for the relevant component against the value in the table.






Note! The accelerometer can only be read off if the car is four wheel drive.









Are the present values OK?

Yes - Fault Found

No - Checking the power supply

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Checking the power supply




- Ignition off
- Connect the breakout box to the brake control module (BCM)
- Ignition on.
Check the power supply to the active yaw control sensor by connecting a voltmeter between terminals #6 (#A6) and #39 (#A39) on the breakout box. The voltage must be normal system voltage.
Replace the control module if the voltage is incorrect.
If the voltage is OK check the power supply cables between the active yaw control sensor:
- terminal #3 and control module terminal #6 (#A6)
- terminal #5 and control module terminal #39 (terminal #A39).
check for an open-circuit.
Replace the active yaw control sensor if the wiring is OK.

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 replace the control module, see Brake Control Module (BCM), replacing Brake Control Module (BCM), Replacing
- 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 the present value of the sensors

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