Diagnostic Procedure For Sensors

Diagnostic Procedure for Sensors

AMBIENT SENSOR

TROUBLE SYMPTOM:
- Fan speed is not switched when the fan speed control dial is in AUTO position.
- Failure related to the ambient sensor is indicated in self-diagnosis.

WIRING DIAGRAM

Wiring Diagram:

Step 1-2:

Step 3-8:

IN-VEHICLE SENSOR

TROUBLE SYMPTOM
- Blower fan speed, air flow outlet and FRESH/RECIRC do not change after turning the AUTO switch to ON.
- Failure related to the in-vehicle sensor is indicated in self-diagnosis.

WIRING DIAGRAM

Wiring Diagram:

Step 1-6:

EVAPORATOR SENSOR

WIRING DIAGRAM

Wiring Diagram:

Step 1-6:

SUNLOAD SENSOR

TROUBLE SYMPTOM
- Sensor identifies that sunlight is at maximum. Then, A/C system is controlled to COOL side.
- Sensor identifies that sunlight is at minimum. Then, A/C system is controlled to HOT side.

NOTE: When the sunload sensor check is performed indoors or in the shade, it could be diagnosed as having an open circuit. Always check the sunload sensor with the sun shining on it.

WIRING DIAGRAM

Wiring Diagram:

Step 1-5: