Troubleshooting

Troubleshooting BCM-U012600

Checking diagnostic trouble codes in the central electronic module (CEM)





Checking diagnostic trouble codes (DTCs) in the central electronic module

Checking other diagnostic trouble codes (DTCs)
In the event of communication problems, the fault may exist in other parts of the communications network.
The role of the central electronic module is to generally control the communications network and to store diagnostic trouble codes (DTCs) in the event of communication problems between control modules.
If there are diagnostic trouble codes (DTCs) stored for communication problems in the central electronic module, stop the fault tracing and fault trace the central electronic module.

Were diagnostic trouble codes (DTCs) for communication problems stored in the central electronic module?

Yes - DONE

No - No Fault Found

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DONE - DONE

No Fault Found - Checking diagnostic trouble codes in the steering angle sensor module (SAS)

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Checking diagnostic trouble codes in the steering angle sensor module (SAS)
If there are any diagnostic trouble codes stored in the steering angle sensor module (SAS), perform troubleshooting of these first.

Were any diagnostic trouble codes stored in the steering angle sensor module (SAS)?

Yes - DONE

No - Checking wiring and terminals

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Checking wiring and terminals




- Ignition off
Check the brake control module (BCM) connector for damaged or bent pins as well as contact resistance and oxidation.
Check the CAN communication cables for open circuit, short circuit to ground and short circuit to supply voltage.
Measure between:
- Brake control module (BCM) terminal #A11 (#A11) and steering angle sensor module (SAS) terminal #6 (#A36).
- Brake control module (BCM) terminal #15 (#A15) and steering angle sensor module (SAS) terminal #15 (#A45).
Also check that the cables are not positioned too close to a source of interference, such as a cellular phone.
Remedy as necessary.

Other information
- Connecting the breakout box, brake control module (BCM), B6324S5 Connecting The Breakout Box
- Connecting the breakout box, B6324S5 Connecting The Breakout Box, Steering Wheel Angle Sensor Module (SAS)
- Checking wiring and terminals Checking Wiring And Terminals

Continue - FAULT FOUND

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