P0686 - ECM/Pcm Power Relay Control Circuit Low - DTC Chart
P0686 - ECM/PCM POWER RELAY CONTROL CIRCUIT LOW - DTC CHART
| 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 . | ||