Rear Air Control (Rear) Diagnosis Procedure #2

BLOWER MOTOR CONTROL SYSTEM


Rear Air Control (Rear) Diagnosis Procedure #2

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

REAR AIR CONTROL (REAR) INOPERATIVE
1.CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY





1. Disconnect rear air control (rear) harness connector.
2. Turn ignition switch ON.
3. Check voltage between rear air control (rear) harness connector
R209 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 CIRCUIT





Check voltage between rear air control (front) harness connector
R209 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 CIRCUIT





1. Turn ignition switch OFF.
2. Check continuity between rear air control (front) harness connector R209 terminal 6 and ground.

Continuity should exist.

Is the inspection result normal?
YES - GO TO 4.
NO - Repair harness or connector.
4.CHECK REAR AIR CONTROL (REAR) LIN BUS CIRCUIT FOR OPEN





1. Disconnect A/C auto amp. connector.
2. Check continuity between A/C auto amp. harness connector
M50 (A) terminal 47 and rear air control (rear) harness connector R209 (B) terminal 5.

Continuity should exist.

Is the inspection result normal?
YES - Replace A/C auto amp. Service and Repair.
NO - Repair harness or connector.