Diagnosis Procedure

INTAKE SENSOR


Description


Intake Sensor
The intake sensor is located on the heater and cooling unit. It converts temperature of air after it passes through the evaporator into a resistance value which is then input to the front air control.





INTAKE SENSOR


Diagnosis Procedure

Regarding Wiring Diagram information, refer to Coupe or Sedan.





SYMPTOM: Intake sensor circuit is open or shorted.
1.CHECK VOLTAGE BETWEEN INTAKE SENSOR HARNESS CONNECTOR AND BODY GROUND





1. Disconnect intake sensor connector M69.
2. Press ignition switch ON.
3. Check voltage between intake sensor connector M69 terminal 1 and ground.





Is the inspection result normal?
YES - GO TO 2
NO - GO TO 4
2.CHECK INTAKE SENSOR GROUND CIRCUIT BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL





1. Press ignition switch OFF.
2. Disconnect front air control connector M152.
3. Check continuity between front air control connector M152 (A) terminal 26 and intake sensor harness connector M69 (B) terminal 4.





If OK, check harness for short.
Is the inspection result normal?
YES - GO TO 3
NO - Repair harness or connector.
3.CHECK INTAKE SENSOR
Check intake sensor. Refer to Diagnosis Procedure.
Is the inspection result normal?
YES - 1. Replace front air control. Refer to Service and Repair.
2. Confirm system operation.
NO - 1. Replace intake sensor. Refer to Intake Sensor.
2. Confirm system operation.
4.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL





1. Press ignition switch OFF.
2. Disconnect front air control connector M152.
3. Check continuity between front air control connector M152 (A) terminal 25 and intake sensor harness connector M69 (B) terminal 1.





If OK, check harness for short.
Is the inspection result normal?
YES - 1. Replace front air control, Refer to Service and Repair.
2. Confirm system operation.
NO - Repair harness or connector.