Advanced Diagnostics

Advanced Diagnostics - DTC P0602: Engine Control Module (ECM) Programming Error (Engine Type: K24Z7)

General Description






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

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






Enable Conditions






Malfunction Threshold
The ECM 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.

- ECM program unwritten

Diagnosis Details

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

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