B279B

B279B, B279C MODE DOOR MOTOR (REAR)

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 MODE DOOR MOTOR (REAR) COMMUNICATION SIGNAL

1.Turn ignition switch ON.
2.Check output waveform between mode door motor (rear) harness connector and ground with the oscilloscope.





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

2. CHECK INSTALLATION OF MODE DOOR MOTOR (REAR)

Check mode door motor (rear) 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 mode door motor (rear). 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 mode door motor (rear) and A/C auto amp. connector.
3.Check continuity between mode door motor (rear) 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