Diesel Data: Automotive Repair

Component Inspection





P0685 ECM/PCM Power Relay Control Circuit /Open

Inspection/Repair - Component Inspection

Component Inspection

Check Main relay
1. IG "OFF" and disconnect main relay.
2. Measure the resistance between battery power supply and control terminals of main relay. (Measurement "A")
3. Measure the resistance between battery power supply and power supply to ECM terminals of main relay. (Measurement "B")
Specification :










4. Is the measured resistance within specification?