Intake Door Motor Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - AUTOMATIC ".

SYMPTOM:

• Intake door does not change.
• Intake door motor does not operate normally.

1. CHECK INTAKE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND
   1. Turn ignition switch OFF.
   2. Disconnect the A/C auto amp. harness connector M49 and the intake door motor harness connector M58.
   3. Check continuity between A/C auto amp. harness connector M49 terminals 21, 22 and the intake door motor harness connector M58 terminals 1, 6.

      Connector	Terminal	Connector	Terminal	Continuity
      M49	21	M58	6	Yes
      	22		1

   4. Check continuity between A/C auto amp. harness connector M49 terminals 21, 22 and ground.

      Connector	Terminal	-	Continuity
      M49	21	Ground	No
      	22

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace harness as necessary.

2. CHECK A/C AUTO AMP. FOR INTAKE AIR DOOR MOTOR POWER AND GROUND
   1. Reconnect A/C auto amp. harness connector.
   2. Turn ignition switch ON.
   3. Check voltage between A/C auto amp. harness connector M49 terminal 21 and terminal 22 while placing the HVAC system into self-diagnostic mode.

      Connector	Terminals		Condition	Voltage (Approx.)
      	(+)	(-)
      M49	21	22	Self-diagnostic mode (opening)	Battery voltage
      	22	21	Self-diagnostic mode (closing)	Battery voltage

      Is the inspection result normal? 

      YES: Inspect intake air door for binding or mechanical failure. If intake air door moves freely, replace the intake air door motor. Refer to "REMOVAL AND INSTALLATION ".

      NO: Replace A/C auto amp. Refer to "REMOVAL AND INSTALLATION ".