W/Harness Inspection

Air Conditioner
B1238 Ambient Temperature Sensor Open (High) - Inspection/Repair:_: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?






Signal Circuit Inspection

Check for open in harness
1. Ignition "OFF".
2. Disconnect ambient temp.sensor.
3. Measure resistance between terminal "1" of ambient temp.sensor and terminal "3" of A/C Control Unit.

Specification :Approx. 0 Ohms




4. Is the measured resistance within specifications?






Ground Circuit inspection

Check for open in ground harness
1. Ignition "OFF"
2. Disconnect ambient temp.sensor.
3. Measure resistance between terminal "2" of ambient temp.sensor and terminal "12" of A/C Control Unit

Specification :Approx. 0 Ohms




4. Is the measured resistance within specifications?