Component Inspection

Component Inspection

Check passenger air mix actuator
1. Ignition "OFF"
2. A/C-ECU, passenger air mix actuator : Disconnect.
3. Connect (+) terminal of battery to WARM (+) of passenger air mix actuator and (-) terminal to COOL (-). (Component side)
4. Verify that the temperature actuator operates to the cool position.
5. Verify that the temperature actuator operates to the warm position with reverse connecting. (WARM (+) and COOL (-)). (Component side)
A. Specification : Refer the specifications in fig. 1








6. Is "Door position" display near the specified value ?
YES
1) Go to "Check potentiometer" procedure.
NO
1) Substitute with a known-good passenger air mix actuator and check for proper operation. If the problem is corrected, replace passenger air mix actuator and then go to "Verification of Vehicle Repair" procedure.
Check potentiometer
1. Ignition "OFF"
2. A/C-ECU : Connect, passenger air mix actuator : Disconnect.
3. Ignition "ON" (ENGINE "OFF").
4. Measure voltage between Signal (F/B) terminal of passenger air mix actuator harness connector and and Sensor ground (-) terminal of A/C-ECU harness connector. (Component side)
A. Specification : Refer the specifications in fig. 2








5. Is "voltage" display near the specified value ?
YES
1) Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good passenger air mix actuator and check for proper operation. If the problem is corrected, replace passenger air mix actuator and then go to "Verification of Vehicle Repair" procedure.