Evaporator Temperature Sensor / Switch: Testing and Inspection

INTAKE SENSOR





Description

COMPONENT DESCRIPTION

Intake Sensor





The intake sensor (1) is located on the evaporator. It converts air temperature after it passes through the evaporator (2) into a resistance value which is then input to the unified meter and A/C amp.




Component Function Check
1.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function STEP-2. Scan Tool Testing and Procedures.
24 or -24 is displayed.
YES - Go to Diagnosis Procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Turn ignition switch ON.
4. Check voltage between intake sensor harness connector and ground.





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





Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK INTAKE SENSOR
Check intake sensor. SEE Component Inspection.
Is the inspection result normal?
YES - Replace unified meter and A/C amp.
NO - Replace intake sensor.
4.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector and unified meter and A/C amp. harness connector.





4. Check continuity between intake sensor harness connector and ground.





Is the inspection result normal?
YES - Replace unified meter and A/C amp.
NO - Repair harness or connector.




Component Inspection
1.CHECK INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Check resistance between intake sensor terminals.





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