DTC P0685: ECM/PCM Internal Circuit Malfunction (Power Control Circuit)
NOTE:
- If the problem does not return after you clear the DTCs or if this DTC is stored intermittently, check for loose terminals at the IGP line connectors before replacing the ECM/PCM.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the GENERAL TROUBLESHOOTING INFORMATION .
- Turn the ignition switch ON (II).
- Clear the DTC with the HDS.
- Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
- YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).
- NO -Intermittent failure, system is OK at this time.