W/Harness Inspection

Engine Control
P0562 System Voltage Low - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?






Power Circuit Inspection

Check voltage (main relay)
1. IG "OFF" and disconnect the main relay.
2. IG "ON".
3. Measure the voltage between power supply terminals of main relay harness connector and chassis ground.

Specification :Approx. B+




4. Is the measured voltage within specification ?





Check voltage (memory power)
1. IG "OFF" and disconnect PCM connector.
2. IG "ON".
3. Measure voltage between memory power terminal of PCM harness connector and chassis ground.

Specification :Approx. B+




4. Is the measured voltage within specification ?





Check open in harness
1. IG "OFF" and disconnect the main relay and PCM connector.
2. Measure the resistance between main relay 'ON' power terminal of main relay harness connector and main relay 'ON' power terminals of PCM harness connector.

Specification :Approx. below 1Ohms




3. Is the measured resistance within specification ?





Check short to ground in harness
1. IG "OFF" and disconnect the main relay and PCM connector.
2. Measure the resistance between main relay 'ON' power terminal of main relay harness connector and chassis ground.

Specification :Infinite




3. Is the measured resistance within specification ?






Control Circuit Inspection

Check short to ground in harness
1. IG "OFF" and disconnect the main relay and PCM connector.
2. Measure the resistance between control terminal of main relay harness connector and chasses ground.

Specification :Infinite




3. Is the measured resistance within specification ?





Check open in harness
1. IG "OFF" and disconnect the main relay and PCM connector.
2. Measure the resistance between control terminal of main relay harness connector and main relay control terminal of PCM harness connector.

Specification :Approx. below 1Ohms




3. Is the measured resistance within specification ?