Mode Door Motor (Rear) Diagnosis Procedure
REAR AIR CONTROL SYSTEM
Mode Door Motor (Rear) Diagnosis Procedure
Regarding Wiring Diagram information, Electrical Diagrams.
DIAGNOSTIC PROCEDURE INOPERATIVE MODE DOOR MOTOR (REAR)
1.CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY
1. Disconnect rear air control (front) harness connector.
2. Turn ignition switch ON.
3. Check voltage between rear air control (front) harness connector R108 terminal 1 and ground.
Battery voltage should exist.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK REAR AIR CONTROL (FRONT) LIN BUS VOLTAGE
Check voltage between rear air control (front) harness connector
R108 terminal 5 and ground.
Battery voltage should exist.
Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 4.
3.CHECK REAR AIR CONTROL (FRONT) GROUND CIRCUITS
1. Turn ignition switch OFF.
2. Check continuity between rear air control (front) harness connector R108 terminal 6 and ground.
Continuity should exist.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
4.CHECK LIN BUS VOLTAGE CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the mode door motor (rear) harness connector.
3. Check continuity between rear air control (front) harness connector R108 (B) terminal 5 and A/C auto amp. harness connector M50 (A) terminal 48.
48 - 5 : Continuity should exist.
Is the inspection result normal?
YES - Replace A/C auto amp. Service and Repair.
NO - Repair or replace harness as necessary.
5.CHECK A/C AUTO AMP. POWER AND GROUND FOR MODE DOOR MOTOR (REAR)
1. Reconnect all disconnected parts.
2. Turn ignition switch ON.
3. Press the mode switch to the FLOOR ( ) mode.
4. Check voltage between A/C auto amp. harness connector M50 terminal 43 and terminal 44 while pressing the mode switch to the vent ( ) mode.
Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 6.
6.CHECK MODE 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
M50 terminal 43 and terminal 44.
Continuity should exist.
Is the inspection result normal?
YES - Replace A/C auto amp.
NO - GO TO 7.
7.CHECK MODE DOOR MOTOR CIRCUITS FOR SHORT TO GROUND
Check continuity between A/C auto amp. harness connector M50 terminal 43, 44 and ground.
43 - Ground : Continuity should not exist.
44 - Ground : Continuity should not exist.
Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace harness as necessary.
8.CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN
1. Disconnect the mode door motor (rear) harness connector.
2. Check continuity between A/C auto amp. harness connector
M50 (A) terminal 43, 44 and the mode door motor (rear) harness connector B156 (B) terminal 5, 6.
5 - 43 : Continuity should exist.
6 - 44 : Continuity should exist.
Is the inspection result normal?
YES - Replace mode door motor. Removal and Installation.
NO - Repair or replace harness as necessary.
9.CHECK A/C AUTO AMP. POWER AND GROUND FOR MODE DOOR MOTOR (REAR)
Check voltage between A/C auto amp. harness connector M50 terminal 43 and terminal 44 while pressing the mode switch to the
FLOOR ( ) mode.
Is the inspection result normal?
YES - GO TO 10.
NO - Replace A/C auto amp. Service and Repair.
10.CHECK A/C AUTO AMP. FOR MODE DOOR MOTOR (REAR) PBR POWER AND GROUND
Check voltage between A/C auto amp. harness connector M50 (A) terminal 28 and M49 (B) terminal 3.
Is the inspection result normal?
YES - GO TO 14.
NO - GO TO 11.
11.CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M50 (A) terminal 28 and M49 (B) terminal 3.
Continuity should exist.
Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 12
12.CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR OPEN
1. Disconnect the mode door motor (rear) harness connector.
2. Check continuity between mode door motor (rear) harness connector B156 (B) terminal 3, 1 and A/C auto amp. harness connector M49 (C) terminal 3, M50 (A) terminal 28.
28 - 1 : Continuity should exist.
3 - 3 : Continuity should exist.
Is the inspection result normal?
YES - Replace mode door motor (rear). Removal and Installation.
NO - Repair or replace harness as necessary.
13.CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
Check continuity between A/C auto amp. harness connector M50 terminal 28 and ground.
Continuity should not exist.
Is the inspection result normal?
YES - Replace the A/C auto amp.
NO - Repair or replace harness as necessary.
14.CHECK PBR FEEDBACK VOLTAGE
Check voltage between A/C auto amp. harness connector M50 terminal 30 and ground while cycling mode switch through all modes.
Voltage : Approx. 1V - 4.5V
Is the inspection result normal?
YES - System OK.
NO - GO TO 15.
15.CHECK PBR FEEDBACK CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the mode door motor harness connector and A/C auto amp. harness connector.
3. Check continuity between mode door motor harness connector
B156 (B) terminal 2 and A/C auto amp. harness connector M50
(A) terminal 30.
Continuity should exist.
Is the inspection result normal?
YES - GO TO 16.
NO - Repair or replace harness as necessary.
16.CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT TO GROUND
Check continuity between A/C auto amp. harness connector M50 terminal 30 and ground.
Continuity should not exist.
Is the inspection result normal?
YES - Replace A/C auto amp. Service and Repair.
NO - Repair or replace harness as necessary.