W/Harness Inspection

Power Supply Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between terminal 30 of the main relay harness connector and chassis ground.
3. Measure the voltage between terminal 85 of the main relay harness connector and chassis ground.

Specification : Approx. B+




4. Is voltage within the specification ?





5. Measure the voltage between terminal 87 of the main relay harness connector and chassis ground.

Specification : Approx. 1.5V




6. Is value within the specification ?






Control Circuit Inspection

1. Ignition "OFF".
2. With ECM connector still disconnected, measure voltage between terminal 64 of the ECM 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 terminal 4 of the ECM harness connector and chassis ground.

Specification : Approx. B+




3. Is voltage within the specification ?






Terminal and Connector 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 ?