Powertrain Controls - ECM/PCM

Code 41 Chart:

Electronic Control Module (ECM):

TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.


1. The Electronic Control Module (ECM) used for this engine can also be used for other engines, and the difference is in the Mem-Cal. If a Code 41 sets, the incorrect Mem-Cal has been installed or it is faulty and it must be replaced.

DIAGNOSTIC AIDS:

- Check Mem-cal to be sure locking tabs are secure.
- Make sure the pins to the Mem-Cal and PROM are making proper contact.
- Make sure part number on the Mem-Cal is correct.
- If the Mem-Cal is defective it must be replaced.
- It is also possible that the ECM is bad, but do not replace until all of the above is checked.