Description
This diagnostic applies to internal microprocessor integrity conditions within the control module. This diagnostic also addresses if the control module is not programmed. The following DTCs are diagnosed in this DTC table:
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 (ROM) |
| • | DTC P0606 Control Module Internal Performance |
| • | DTC P0607 Control Module Performance |
| • | DTC P1600 Control Module Long Term Memory Reset |
| • | DTC P1621 Control Module Long Term Memory Performance |
| • | DTC P1683 Control Module Ignition Off Timer Performance |
Diagnostic Aids
For complete details on programming the PCM, refer to Powertrain Control Module Programming .
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
A DTC P0602 indicates the PCM is not programmed.
-
Attempt to program the PCM. If the PCM fails to program a second time, replace the PCM.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Engine Controls? | Go to Step 2 | |
Does DTC P0602 set? | Go to Step 3 | Go to Step 5 | |
3 | Program the PCM. Refer to Powertrain Control Module Programming . Does DTC P0602 reset? | Go to Step 4 | Go to Step 6 |
Does DTC P0602 reset? | Go to Step 5 | Go to Step 6 | |
5 | Replace the PCM. Refer to Powertrain Control Module Programming . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the DTC run and pass? | Go to Step 7 | Go to Step 2 |
7 | With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? | System OK |
