Troubleshooting

Troubleshooting BCM-C006A04

Checking the sensor's present value.




- Ignition off
- Check the connectors of the brake control module (BCM) and AYC sensor for contact resistance and oxidation.
- Ignition on
- Read off the value in question.
Check the read value of the respective component to the value in the table.






Note! The value for the accelerometer can only be read out in four-wheel drive vehicles.









Are the present values OK?

Yes - Troubleshooting procedure complete

No - Checking the voltage feed

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Checking the voltage feed




- Ignition off
- Connect a breakout box to the brake control module (BCM).
- Ignition on
Check the voltage feed to the AYC sensor by connecting a voltmeter between terminals #6 (#A6) and #39 (#A39) on the breakout box. The voltage should equal normal system voltage.
If the voltage is incorrect, replace the brake control module (BCM).
If the voltage is OK, check the cables for an open circuit.
Measure between:
- AYC sensor terminal #3 and brake control module (BCM) terminal #6 (#A6).
- AYC sensor terminal #5 and brake control module (BCM) terminal #39 (#A39).
If the cables are OK, replace the AYC sensor.

Other information
- Connecting the breakout box, brake control module (BCM), B8444S, B6324S Connecting the Breakout Box
- Brake Control Module (BCM), replacing Service and Repair
- Active yaw control sensor, replacing Service and Repair
- 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 malfunction has been remedied.








- Ignition off
- Reconnect the connectors, components, etc.
- Test-drive the vehicle 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.

Note! Do not turn off the ignition between test-driving and reading out diagnostic trouble codes. This is to obtain the correct status of the diagnostic trouble codes.

Then read out the diagnostic trouble code's status without turning off the ignition after the test-drive.





Is the status of the diagnostic trouble code intermittent?

Yes - Troubleshooting procedure complete

No - Troubleshooting information

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Troubleshooting 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 sensor's present value.

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