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.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
A DTC P0602 indicates the ECM is not programmed.
-
Attempt to program the ECM. If the ECM fails to program a second time, replace the ECM.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Engine Controls? | Go to Step 3 | |
2 |
Does the scan tool display DTC P0686, P0687, P0689, or P0690? | Go to Step 3 | |
3 | Is DTC P0606 set? | Go to Step 4 | Go to Step 5 |
4 | Was DTC P0606 only present after interrogating the vehicle for stored Failure Records or Freeze Frame Data with a scan tool? | Go to Step 9 | Go to Step 8 |
Is DTC P0602 set? | Go to Step 6 | Go to Step 8 | |
6 | Program the engine control module (ECM). Refer to Service Programming System (SPS) in Programming. Does DTC P0602 reset? | Go to Step 7 | Go to Step 9 |
Does DTC P0602 reset? | Go to Step 8 | Go to Step 9 | |
8 | Replace the ECM. Refer to Engine Control Module Replacement . Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC run and pass? | Go to Step 10 | Go to Step 3 |
10 | Observe the Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? | System OK |
