DTC P0685: Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Control Circuit/Open
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P0685 - ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY CONTROL CIRCUIT/OPEN
| Description: | This diagnostic trouble code (DTC) sets when the ignition switch position run (ISP-R) circuit indicates the ignition key is in OFF, ACC, or LOCK position, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time. | ||
| Possible Causes: |
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| Diagnostic Aids: | Ability to communicate with the PCM when the ignition key is in the OFF, ACC, or LOCK position indicates a hard fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test B . | ||