W/Harness Inspection

Air Conditioner

Air Conditioner - B1201 Humidity Sensor Short (Low) - 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?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Signal Circuit Inspection" procedure

Signal Circuit Inspection

Check for short to ground in harness
1. Ignition "OFF"
2. Disconnect Humidity Sensor.
3. Measure resistance between terminal "3" of Humidity sensor and chassis ground.
A. Specification : Approx. Infinity Ohms




4. Is the measured resistance within specifications?
YES
1) Go to "Power Circuit Inspection " procedure.
NO
1) Check for short to ground in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Power Supply Circuit Inspection

Check for open in power harness
1. Ignition "ON"
2. Disconnect Humidity Sensor.
3. Measure voltage value between terminal "5" of Humidity Sensor and chassis ground
A. Specification :5 V




4. Is the measured voltage value within specifications?
YES
1) Go to "Component Inspection " procedure.
NO
1) Check for open in power harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.