DTC Troubleshooting: P0685 (135)
|DTC P0685:||ECM/PCM Power Control Circuit/Internal Circuit Malfunction|
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
- If the problem doesn't return after you clear the DTC, or it this DTC is stored intermittently, check for loose terminals at the IGP line connectors before replacing the ECM/PCM.
|1.||Turn the ignition switch ON (II).|
|2.||Clear the DTC with the HDS.|
|3.||Start the engine, then let it idle for 30 seconds.|
|4.||Turn the ignition switch OFF.|
|5.||Start the engine, then let it idle for 30 seconds.|
|6.||Turn the ignition switch OFF.|
|7.||Turn the ignition switch ON (II).|
|8.||Check for Temporary DTCs or DTCs with the HDS.|
Is DTC P0685 indicated?
YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n
NO - Intermittent failure, system is OK at this time.n