P1683

DTC P1683

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 P0604 Control Module Random Access Memory (RAM)
- DTC P0606 Control Module Internal Performance
- DTC P0607 Control Module Performance
- DTC P1621 Control Module Long Term Memory Performance

TEST DESCRIPTION

Steps 1-7:

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