DTC P0602: Powertrain Control Module (PCM) Programming Error
General Description
The powertrain control module (PCM) is equipped with an update program to update its control program. The programs in the CPU of the PCM are classified as a PCM program (update-capable program) and a program for the update function (non-updatable program). The program update only updates the PCM program. When the PCM power is turned off during an update, the power for the update function is lost, and the update process stops. When the program update is stopped before it is completed, the PCM stores a DTC that indicates the update is not finished.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 1 second or less |
| DTC Type | One drive cycle, MIL on |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
The PCM program update stops 1 second before it is finished.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- PCM program unwritten
Diagnosis Details
Conditions for setting the DTC
When the PCM program is not written in the PCM, the MIL comes on and a Pending DTC and a Confirmed DTC are stored in the PCM memory.
Conditions for clearing the DTC
The MIL, the Pending DTC, and the Confirmed DTC are cleared when the PCM program update is completed.