B2796

B2796, B2797, B2798 COMMUNICATION ERROR

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.
REAR AIR CONTROL) FOR OPEN

1. CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. -> REAR AIR CONTROL) FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect rear air control and A/C auto amp. connector.
3.Check continuity between rear air control harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair harness or connector.
REAR AIR CONTROL) FOR SHORT

2. CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. -> REAR AIR CONTROL) FOR SHORT

Check continuity between rear air control harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
Revision: March 20122013 Infiniti JX
NO- Repair harness or connector.
A/C AUTO AMP.) CIRCUIT FOR

3. CHECK COMMUNICATION SIGNAL CIRCUIT (REAR AIR CONTROL -> A/C AUTO AMP.) CIRCUIT FOR OPEN

OPEN
Check continuity between rear air control harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.
A/C AUTO AMP.) CIRCUIT FOR

4. CHECK COMMUNICATION SIGNAL CIRCUIT (REAR AIR CONTROL -> A/C AUTO AMP.) CIRCUIT FOR SHORT

SHORT
Check continuity between rear air control harness connector and ground.





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