W/Harness Inspection

Check CAN communication line for open

1. Ignition "OFF"
2. Disconnect PCM harness connector.
3. Measure resistance between High signal terminal and Low signal terminal of PCM harness connector.

Specification : Approx. 110-130 Ohms





4. Is resistance within the specification?






Check CAN communication line for short to ground

1. Measure resistance between High signal terminal of PCM harness connector and chassis ground.
2. Measure resistance between Low signal terminal of PCM harness connector and chassis ground.

Specification : Infinite (above 10 kOhms)





3. Is resistance within the specification?






Check CAN communication line for short to battery

1. Disconnect the connectors related to the CAN communication
2. Ignition "ON" & Engine "OFF"
3. Measure voltage between High signal terminal of PCM harness connector and chassis ground.
4. Measure voltage between Low signal terminal of PCM harness connector and chassis ground.

Specification : Approx. 0V





5. Is voltage within the specification?






Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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?