Signal Missing

Signal missing

Checking the power supply and ground for the brake control module (BCM)
Check that the fuse for the control module is intact.
Check the power supply and ground for the brake control module (BCM) as follows.
Remedy as necessary.

Other information:
- Checking the power supply, brake control module, B8444S Checking Power Supply, Brake Control Module
- Checking the ground terminals, brake control module, B8444S Checking The Ground Terminals, Brake Control Module
- For information about fuse and terminal numbers, see the relevant Wiring Diagram.
- Checking wiring and terminals Checking Wiring And Terminals









Was a fault detected?

Yes - Checking the brake control module (BCM)Signal missing, B8444S Signal Missing

No - Checking communication with the brake control module (BCM)Signal missing, B8444S Signal Missing

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Checking communication with the brake control module (BCM)

Hint: The CAN communication with the control module is probably OK if the control module ID can be read off. In that case the fault is probably intermittent and will then be more difficult to trace.




- Try to communicate with the brake control module (BCM) by reading off the control module ID
- Click on the symbol for VCT2000 to begin reading off

Continue - Signal missing, B8444S Signal Missing Checking the brake control module (BCM)

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No Fault Found - No Fault Found

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Checking the brake control module (BCM)

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reconnect the connectors. Reinstall the components
- Ignition on for at least 10 seconds.
Read off the control module ID from the brake control module (BCM) by clicking on the VCT2000 symbol.





Could the control module ID be read off?

Yes - FAULT FOUND

No - Fault-tracing information Signal missing, B8444S Signal Missing

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Fault-tracing information

Attempt New Test - Signal missing, B8444S Signal Missing Checking the power supply and ground for the brake control module (BCM)

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