Signal Outside Its Permitted Range
Signal outside its permitted range
Checking the connectors
Note! If diagnostic trouble codes (DTCs) other than BCM-0121, BCM-0125, BCM-0127 or BCM-0129 are stored in the brake control module (BCM), select cancel and fault trace these diagnostic trouble codes (DTCs) first.
- Ignition off
- Check the brake control module (BCM) and the active yaw control sensor connectors. Check for contact resistance and oxidation
- Ensure that no sources of interference, such as a mobile telephone or radio receiver, are in the vicinity of the active yaw control sensor
- Test drive the car. See the test drive schedule. 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 diagnostic trouble codes (DTCs).
If the diagnostic trouble code (DTC) status is intermittent the cause of the fault was probably either contact resistance in the control module or active yaw control sensor connectors, or a source of interference too close to the sensor.
Other information
- To remove the connector for the active yaw control sensor, see Active yaw control sensor, replacing Active Yaw Control Sensor, Replacing
- To remove the brake control module (BCM) connector, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM).
Was the status of the diagnostic trouble code (DTC) permanent?
Yes - Checking the wiring
No - Fault Found
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Checking the wiring
- Ignition off.
Check the brake control module (BCM) and the active yaw control sensor connectors. Check for contact resistance and oxidation.
Check the wiring between the connector for the active yaw control sensor:
- terminal #1 and control module terminal #A25 (#A25)
- terminal #2 and control module terminal #A29 (#A29)
- terminal #3 and control module terminal #A6 (#A6)
- terminal #5 and control module terminal #A39 (#A39).
Check for an open-circuit.
Check the wheel alignment.
Remedy as necessary.
Other information
- To connect the breakout box, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM)
- For information about signals, see Signal specification, brake control module (BCM) with DSTC (dynamic stability and traction control) Signal Specification
- To check the wheel alignment, see Wheel alignment, checking / adjusting Service and Repair
- To replace the active yaw control sensor, see Active yaw control sensor, replacing Active Yaw Control Sensor, Replacing
- 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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Attempt New Test - Checking the connectors
FAULT-TRACING FAILED - FAULT-TRACING FAILED
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