Engine Control Module (ECM)

Condition(s):

DTC P0603 ECM data corrupted

Possible Source(s):
- ECM failure

Action(s) to take:
- GO to Pinpoint Test A P0603

DTC P1609 Internal control module CPU to CPU communication failure

Possible Source(s):
- ECM flash programming circuit short circuit to ground
- ECM failure

Action(s) to take:
- GO to Pinpoint Test Z P1609