Engine and Fuel Controls

DTC P0601

DESCRIPTION
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC P0601 Control Module Read Only Memory (ROM)
- DTC P0602 Control Module Not Programmed
- DTC P0603 Control Module Long Term Memory Reset
- DTC P0604 Control Module Random Access Memory (RAM)
- DTC P0606 Control Module Internal Performance
- DTC P1621 Control Module Long Term memory Performance
- DTC P2610 Control Module Ignition Off Timer Performance

TEST DESCRIPTION

Step 1 - Step 7:

The number below refers to the step number on the diagnostic table.
2. A DTC P0602 indicates that the ECM is not programmed.