Note. This DTC is indicated when a ECM/PCM update is not completed. Do not turn the ignition switch OFF while updating the ECM/PCM. If you turn the ignition switch OFF before completion, the ECM/PCM will be damaged.
- Do the ECM/PCM update procedure (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219370-S15199960282006021400000) ).
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P0602 indicated? YES - Replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-219371-S37179676622006021400000) ). NO - Troubleshooting is complete.