W/Harness Inspection

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between power terminals of the main relay harness connector and chassis ground.

Specification : Approx. B+





3. Is voltage within the specification?





4. Measure the voltage between 'power to sensor' terminal of the main relay harness connector and chassis ground.

Specification : Approx. 0V & 4.5V





5. Is value within the specification?






Control Circuit Inspection

1. Ignition "OFF"
2. With PCM connector disconnected, measure voltage between main relay control terminal of the PCM harness connector and chassis ground.

Specification : Approx. B+





3. Is voltage within the specification?






Ignition Switch Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between 'ON/START Input' terminal of the PCM harness connector and chassis ground.

Specification : Approx. B+





3. 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?