B279E

B279D, B279E REAR SHUT-OFF DOOR MOTOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Turn ignition switch ON.
2.Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
3.Check if any DTC No. is displayed in the self-diagnosis results.
Is DTC detected?
YES- Refer to "Diagnosis Procedure" .
NO- Inspection End.


Diagnosis Procedure

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

1. CHECK REAR SHUT-OFF DOOR MOTOR COMMUNICATION SIGNAL

1.Turn ignition switch ON.
2.Check output waveform between rear shut-off door motor harness connector and ground with the oscilloscope.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 3.

2. CHECK INSTALLATION OF REAR SHUT-OFF DOOR MOTOR

Check rear shut-off door motor is properly installed. Refer to "Exploded View Front Door Motors" Exploded View - Front Door Motors.
Is the inspection result normal?
Revision: March 20122013 Infiniti JX
YES- Replace shut-off door motor. Refer to "REAR SHUT-OFF DOOR MOTOR : Removal and Installation" Rear Shut-Off Door Motor.
NO- Repair or replace malfunctioning part.

3. CHECK MODE DOOR MOTOR (REAR) COMMUNICATION SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect rear shut-off door motor and A/C auto amp. connector.
3.Check continuity between rear shut-off door motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- Replace A/C auto amp. Refer to "Removal and Installation" Removal and Installation.
NO- Repair harness or connector.
Revision: March 20122013 Infiniti JX