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. IG "OFF" and disconnect Auto cruise switch connector.
2. IG "ON" & ENG "OFF"
3. Measure voltage between terminal 8 of auto cruise switch harness connector and chassis ground.

Specification : Approx. B+





4. Is the measured voltage within specification ?






Signal Circuit Inspection

1. Check voltage
(1) IG "OFF" and disconnect auto cruise switch connector.
(2) IG "ON" & ENG "OFF".
(3) Measure voltage between terminal 7 of auto cruise switch harness connector and chassis ground.

Specification : Approx. 5V





(4) Is the measured voltage within specification ?





2. Check short in harness
(1) IG "OFF" and disconnect auto cruise switch connector and PCM connector.
(2) Measure resistance between terminals 6 and 7 of auto cruise switch harness connector.
(3) Measure resistance between terminals 7 and 8 of auto cruise switch harness connector.

Specification : Infinite





(4) Is the measured resistance within specification ?





3. Check open in harness
(1) IG "OFF" and disconnect auto cruise switch connector and PCM connector.
(2) Measure resistance between terminal 7 of auto cruise switch harness connector and terminal 25 of PCM harness connector.

Specification : Below 1 ohms





(3) Is the measured resistance within specification ?