W/Harness Inspection

B1203 Heater Water Temperature Sensor Short (Low)

Inspection/Repair - W/Harness Inspection

Terminal & 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 short to ground in harness
1. Ignition "OFF".
2. Disconnect Water temp. sensor and Connect A/C control unit main harness connector.
3. Measure resistance between Signal (+) terminal of Water temp. sensor harness connector and chassis ground.

Specification : Infinity




4. Is the measured resistance within specification?