Internal Fault. Permanent Fault

Internal fault. Permanent fault

Checking the control module




- Ignition on
- Read off the check sum and calculated check sum.
Check that the check sums correspond.
If they do not correspond this indicates an internal fault in the control module.









Are the values correct?

Yes - No Fault Found

No - Replacing the control module

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Replacing the control module
The control module has registered an internal fault.
To replace the control module, see Replacing the transmission control module (TCM), AW55-50/51SN Service and Repair.





Continue - DONE

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