Diagnosis Procedure

INTAKE SENSOR


Description


COMPONENT DESCRIPTION





- Intake sensor (1) is located on the evaporator.
- The intake sensor converts the evaporator surface temperature detected with thermistor into the voltage, and the A/C auto amp. inputs this voltage.

INTAKE TEMPERATURE CORRECTION
- The A/C auto amp. inputs the temperature detected with the intake sensor as the evaporator surface temperature.
- Perform the correction of the temperature detected with the intake sensor for air conditioner control.
- The A/C auto amp. performs the correction so that the recognition intake temperature changes depending on the difference between the detected intake temperature and the recognition intake temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small.





INTAKE SENSOR


Diagnosis Procedure

1.CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the intake sensor connector.
3. Turn the ignition switch ON.
4. Check voltage between intake sensor harness connector and the ground.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 4.
2.CHECK INTAKE SENSOR GROUND CIRCUIT CONTINUITY
1. Turn the ignition switch OFF.
2. Disconnect the A/C auto amp. connector.
3. Check continuity between intake sensor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK INTAKE SENSOR
Check the intake sensor components. Component Inspection.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace the intake sensor.
4.CHECK INTAKE SENSOR OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the A/C auto amp. connector.
3. Check continuity between intake sensor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK INTAKE SENSOR SHORT CIRCUIT
Check continuity between intake sensor harness connector and the ground.





Is the inspection result normal?
YES - Replace the A/C auto amp.
NO - Repair the harnesses or connectors.