Diagnosis Procedure

AIR MIX DOOR MOTOR


WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure

1.PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to Diagnosis Description
Does code No. 20 appear on the display?
YES - GO TO 2.
NO - Go to appropriate malfunctioning sensor circuit.
2.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to Diagnosis Description
Is it operated normally?
YES - END.
NO-1 - Malfunction is detected on driver seat side. GO TO 3.
NO-2 - Malfunction is detected on passenger seat side. GO TO 7.
3.CHECK INSTALLATION OF AIR MIX DOOR MOTOR (DRIVER SIDE)
Check installation of air mix door motor (driver side). Refer to Exploded View.
Is it installed normally?
YES - GO TO 4.
NO - Repair or replace air mix door motor (driver side).
4.CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
Check voltage between air mix door motor (driver side) harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK SIGNAL FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
Confirm A/C LAN signal between air mix door motor (driver side) harness connector and ground using an oscilloscope.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair harness or connector.
6.CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor (driver side) connector.
3. Check continuity between air mix door motor (driver side) harness connector and ground.





Is the inspection result normal?
YES - Replace air mix door motor (driver side).
NO - Repair harness or connector.
7.CHECK INSTALLATION OF AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check installation of air mix door motor (passenger side). Refer to Exploded View.
Is it installed normally?
YES - GO TO 8.
NO - Repair or replace air mix door motor (passenger side).
8.CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check voltage between air mix door motor (passenger side) harness connector and ground.





Is the inspection result normal?
YES - GO TO 9.
NO - Repair harness or connector.
9.CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Confirm A/C LAN signal between air mix door motor (passenger side) harness connector and ground using an oscilloscope.





Is the inspection result normal?
YES - GO TO 10.
NO - Repair harness or connector.
10.CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect air mix door motor (passenger side) connector.
3. Check continuity between air mix door motor (passenger side) harness connector and ground.





Is the inspection result normal?
YES - Replace air mix door motor (passenger side).
NO - Repair harness or connector.