B2799

B2799, B279A AIR MIX 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 AIR MIX DOOR MOTOR (REAR) COMMUNICATION SIGNAL

1.Turn ignition switch ON.
2.Check output waveform between air mix 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 AIR MIX DOOR MOTOR (REAR)

Check air mix door motor (rear) is properly installed. Refer to "Exploded View Front Door Motors" Exploded View - Front Door Motors.
Revision: March 20122013 Infiniti JX
Is the inspection result normal?
YES- Replace air mix door motor (rear). Refer to "AIR MIX DOOR MOTOR : Removal and Installation Air Mix Door Motor (Driver Side)" Removal and Installation - Air Mix Door Motor (Driver Side).
NO- Repair or replace malfunctioning part.

3. CHECK AIR MIX DOOR MOTOR (REAR) COMMUNICATION SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect air mix door motor (rear) and A/C auto amp. connector.
3.Check continuity between air mix 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