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:
Important: The DTCs listed below, are not applicable to all vehicles.
| • | 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 P0605 Control Module Programming Read Only Memory |
| • | DTC P0606 Control Module Internal Performance |
| • | DTC P0607 Control Module Performance |
| • | DTC P1600 Long Term Memory Reset |
| • | DTC P1621 Long Term Memory Performance |
| • | DTC P1627 Analog to Digital Performance |
| • | DTC P1680 Accelerator Pedal Position (APP) Performance |
| • | DTC P1681 Throttle Position (TP) System Performance |
| • | DTC P1683 Ignition Off Timer Performance |
| • | DTC P2610 Ignition Off Timer Performance |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Engine Controls? | Go to Step 2 | |
Is DTC P0602 set? | Go to Step 3 | Go to Step 5 | |
3 | Program the engine control module (ECM). Refer to Service Programming System (SPS) in Programming. Does DTC P0602 reset? | Go to Step 4 | Go to Step 6 |
4 |
Does DTC P0602 reset? | Go to Step 5 | Go to Step 6 |
5 | Replace the ECM. Refer to Engine Control Module Replacement . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 7 |
7 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | System OK |
