DTC P0685 - ECM/Pcm Power Relay Control Circuit/Open
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2018 Lincoln Navigator, 2018 Lincoln MKZ, 2018 Lincoln MKX, 2018 Lincoln MKT, and 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
P0685 - ECM/PCM POWER RELAY CONTROL CIRCUIT/OPEN
| Description: | This DTC sets when the ignition switch position run (ISP-R) circuit indicates the ignition is in the 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 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 . | ||