Advanced Diagnostics

Advanced Diagnostics - DTC P0602: Engine Control Module (ECM)/Powertrain Control Module (PCM) Programming Error






General Description
The engine control module (ECM)/powertrain control module (PCM) is equipped with an update program to update its control program. The programs in the CPU of the ECM/PCM are classified as an ECM/PCM program (update-capable program) and a program for the update function (non-updatable program). The program update only updates the ECM/PCM program. When the ECM/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 ECM/PCM stores a DTC that indicates the update is not finished.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The ECM/PCM program update stops 1second before it is finished.

Diagnosis Details

Conditions for setting the DTC
When the ECM/PCM program is not written in the ECM/PCM, the MIL comes on, and a Pending DTC and a Confirmed DTC are stored in the ECM/PCM memory.

Conditions for clearing the DTC
The MIL, the Pending DTC, and the Confirmed DTC are cleared when the ECM/PCM program update is completed.