Component Inspection

B1234 In-Car Temperature Sensor Open (High)

Inspection/Repair - Component Inspection

Component Inspection

Check Incar temp. sensor
1. Ignition "OFF"
2. Disconnect Incar temp. sensor and Connect A/C control unit main harness connector.
3. Measure resistance between Signal (+) terminal of Incar temp. sensor harness connector and Sensor ground harness connector. (Component side)

Specification : Refer the specifications in fig.1)









Fig.1) ** Specifications : Resistance value of incar sensor as a function of temperature.
** The actual value may differ from it according to various engine condition.
4. Is "resistance" display near the specified value?





Check A/C-ECU
1. Ignition "OFF"
2. Disconnect Incar temp. sensor and Connect A/C control unit main harness connector.
3. Ignition "ON" (ENGINE "OFF").
4. Measure voltage between Signal (+) terminal of Incar temp. sensor harness connector and chassis ground. (Component side)

Specification : Approx. 5 V




5. Is "voltage" display near the specified value?