Diagnosis Procedure

INTAKE DOOR MOTOR


Intake Door Motor Diagnosis Procedure


SYMPTOM:
- Intake door does not change.
- Intake door motor does not operate normally.

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
1.CHECK A/C AUTO AMP. FOR POWER AND GROUND





1. Turn ignition switch ON.
2. Check voltage between A/C auto amp. harness connector M49 terminal 21 and terminal 22 while placing the HVAC system into self-diagnostic mode.





Is the inspection result normal?
OK - GO TO 3.
NO - GO TO 2.
2.CHECK INTAKE DOOR MOTOR CIRCUITS FOR SHORT TO GROUND





1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M49 terminal 21, 22 and ground.

21 - Ground : Continuity should not exist.
22 - Ground : Continuity should not exist.

Is the inspection result normal?
OK - Replace A/C auto amp. Refer to Service and Repair.
NO - Repair or replace harness as necessary.
3.CHECK A/C AUTO AMP. FOR GROUND AND POWER





1. Press the BACK button to back out of self-diagnostic mode.
2. Check voltage between A/C auto amp. harness connector M49 terminal 21 and terminal 22 while placing the HVAC system into self-diagnostic mode.





Is the inspection result normal?
OK - GO TO 4.
NO - Replace A/C auto amp. Refer to Service and Repair.
4.CHECK INTAKE DOOR MOTOR AND CIRCUITS FOR OPEN





1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M49 terminal 21 and terminal 22.

Continuity should exist.

Is the inspection result normal?
OK - Replace intake door motor. Refer to Intake Door Motor.
NO - GO TO 5.
5.CHECK INTAKE DOOR MOTOR CIRCUITS FOR OPEN





1. Disconnect the intake door motor harness connector.
2. Check continuity between A/C auto amp. harness connector
M49 (A) terminal 21, 22 and the intake door motor harness connector M58 (B) terminal 1, 6.

21 - 6 : Continuity should exist.
22 - 1 : Continuity should exist.

Is the inspection result normal?
YES - Replace intake door motor. Refer to Intake Door Motor .
NO - Repair or replace harness as necessary.