Component Inspection

Air Conditioner
B1203 Heater Water Temperature Sensor Short(Low) - Inspection/Repair:_:Component Inspection

Component Inspection

Check WATER TEMP Sensor
1. Ignition "OFF".
2. Disconnect water temp. sensor.
3. Measure resistance between terminal "1" and "2" of water temp. sensor.

Specification :Refer the specifications in fig3)








Fig3) Specifications : Resistance value of water temp sensor as a function of temperature.
4. Is the measured resistance within specifications in fig3)? (tolerance limits ±3%)





Check A/C Control Unit
1. Engine "ON".
2. Disconnect water temp. sensor.
3. Measure Voltage between terminal "7" of A/C Control Unit and chassis ground

Specification :Approx. 5V




4. Is the measured voltage within specifications?