W/Harness Inspection

Air Conditioner
B1285 Direction Control Motor -AUTO Defog - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor connection. 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?






Control Circuit Inspection

Check for open in harness
1. Ignition "OFF"
2. Disconnect Auto Defog sensor and A/C control unit main harness connector.
3. Measure resistance between OPEN terminal of Auto Defog sensor harness connector and OPEN terminal of A/C-ECU harness connector.
4. Measure resistance between CLOSE terminal of Auto Defog sensor harness connector and CLOSE terminal of A/C-ECU harness connector.

Specification :1Ohms below




5. Is the measured resistance within specification?





Check short to ground in harness
1. Ignition "OFF"
2. Disconnect Auto Defog actuator and A/C control unit main harness connector.
3. Measure resistance between OPEN terminal of Auto Defog actuator harness connector and chassis ground.
4. Measure resistance between CLOSE terminal of Auto Defog actuator harness connector and chassis ground.

Specification :Infinity




5. Is the measured resistance within specification?