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 Supply Circuit Inspection

Check for open in harness
1. Ignition "OFF".
2. Disconnect passenger Air Mix Actuator.
3. Measure resistance between terminal "3" of passenger Air Mix Actuator and terminal "17"of A/C control unit.
4. Measure resistance between terminal "4" of passenger Air Mix Actuator and terminal "16"of A/C control unit.

Specification : Approx. 0 ohms





5. Is the measured resistance within specifications ?





Check for short to ground in harness
1. Ignition "OFF".
2. Disconnect passenger Air Mix Actuator.
3. Measure resistance between terminal "3,4" of passenger Air Mix Actuator and chassis ground

Specification : Approx. Infinity ohms





4. Is the measured resistance within specifications ?