In-Vehicle Sensor

IN-VEHICLE SENSOR

Description


COMPONENT DESCRIPTION






- The in-vehicle sensor (1) is installed to the finisher.
- The in-vehicle sensor converts the interior air temperature of the passenger room sucked by the aspirator detected with the thermistor into the voltage, and the A/C auto amp. inputs this voltage.

ASPIRATOR






The aspirator (1) generates the vacuum by the air blown from the A/
C unit assembly and draws the air of the passenger room to the in-vehicle sensor area via the aspirator duct.

White arrow indicates : Vehicle front







INTERIOR AIR TEMPERATURE CORRECTION

- The A/C auto amp. inputs the temperature detected with the in-vehicle sensor as the interior air temperature.
- Perform the correction of the temperature detected with the in-vehicle sensor for each air conditioner control.


Diagnosis Procedure


1. CHECK IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect the in-vehicle sensor connector.
3.Turn the ignition switch ON.
4.Check voltage between in-vehicle sensor harness connector and the ground.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK IN-VEHICLE SENSOR GROUND CIRCUIT CONTINUITY

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Check continuity between in-vehicle 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 IN-VEHICLE SENSOR

Check the in-vehicle sensor components. .
Is the inspection result normal?
YES- INSPECTION END
NO- Replace the in-vehicle sensor.

4. CHECK IN-VEHICLE SENSOR OPEN CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Check continuity between in-vehicle 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 IN-VEHICLE SENSOR SHORT CIRCUIT

Check continuity between in-vehicle sensor harness connector and the ground.





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


Component Inspection


1. CHECK IN-VEHICLE SENSOR

1.Turn the ignition switch OFF.
2.Remove the in-vehicle sensor. Exploded View.
3.Check the resistance between the in-vehicle sensor terminals. Refer to the applicable table for the normal value.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace the in-vehicle sensor.