Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). This DTC is indicated when a PCM update is not completed. Do not turn the ignition switch OFF while updating the PCM. If you turn the ignition switch OFF before completion, the PCM can be damaged.
- Do the PCM update procedure (see UPDATING THE PCM ).
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P0602 indicated? YES -Replace the original PCM (see PCM REPLACEMENT ). NO -The update is complete.