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

1. Power circuit inspection
(1) Key "OFF".
(2) Disconnect the main relay connector.
(3) Key "ON".
(4) Measure the voltage between terminal 2 of main relay harness connector and chassis ground.
(5) Measure the voltage between terminal 5 of main relay harness connector and chassis ground.

Specification : B+





(6) Is the measured voltage within specification ?





2. Check open in harness
(1) Key "OFF".
(2) Disconnect main relay and PCM connector.
(3) Measure the resistance between terminal 3 of main relay harness connector and terminals 38, 40 of PCM connector.

Specification : Approx. below 1 Ohms





(4) Is the measured resistance within specification ?





3. Check short in harness
(1) Key "OFF".
(2) Disconnect main relay and PCM connector.
(3) Measure the resistance between terminal 3 of main relay harness connector and chassis ground.

Specification : Infinite





(4) Is the measured resistance within specification ?






Control Circuit Inspection

1. Check short in harness
(1) Key "OFF".
(2) Disconnect main relay and PCM connector.
(3) Measure the resistance between terminal 4 of main relay harness connector and chassis ground.

Specification : Infinite





(4) Is the measured resistance within specification ?





2. Check open in harness
(1) Key "OFF".
(2) Disconnect main relay and PCM connector.
(3) Measure the resistance between terminal 4 of main relay harness connector and terminal 43 of PCM connector.

Specification : Approx. below 1 Ohms





(4) Is the measured resistance within specification ?






Ground Circuit inspection

1. Open in circuit inspection
(1) Key "OFF".
(2) Disconnect PCM connector.
(3) Measure the resistance between terminals 35, 36 of PCM connector and chassis ground.
(4) Measure the resistance between terminals 37, 38, 39 of PCM connector and chassis ground.

Specification : Approx. blow 1 Ohms





(5) Is the measured resistance within specification ?