This DTC is designed to not allow a service PCM to be installed in a vehicle without first flashing software into it.
Test continuously.
No software data is present in PCM.
• | Fuel pump is disabled. |
• | Injector pulse width is set to 0. |
• | Back-up fuel is disabled. |
• | The PCM will illuminate the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails. |
• | The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records. |
• | The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail. |
• | A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail. |
• | A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test. |
• | Use a scan tool to clear DTCs. |
• | Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes in Powertrain Control Module Description . |
Number(s) below refer to the step number(s) on the Diagnostic Table.
Flashing the PCM with the correct software for the vehicle.
If flashing attempt fails the PCM is faulty.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | Go to Step 2 | |
Using the latest Techline procedures flash the PCM with the correct software. Does DTC P0602 reset? | -- | Go to Step 3 | Go to Powertrain Control Module Diagnosis for Verify Repair | |
Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Is the replacement complete? | -- | Go to Powertrain Control Module Diagnosis for Verify Repair | -- |