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Home >> Infiniti >> 2012 >> M37x AWD V6-3.7L (VQ37VHR) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B2755

B2755




B2753, B2754, B2755 AIR MIX DOOR MOTOR (PASSENGER SIDE)

DTC Logic


DTC DETECTION LOGIC

NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. CAN Comm Circuit.
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Control Unit.
- If All of door motors DTC (B2750 - B276A) are detected, check door motor PBR power supply and ground circuit. With Forest Air (With Forest
Air).
- If All of door motors DTC (B2750 - B2764) are detected, check door motor PBR power supply and ground circuit. Without Forest Air (Without
Forest Air).






DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Turn ignition switch ON.
2.Select "Self Diagnostic Result" mode of "HVAC" using CONSULT.
3.Check DTC.
Is DTC detected?
YES- .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) OPERATION

1.Turn ignition switch ON.
2.Operate temperature control switch (passenger side) and check by operation sound that air mix door motor (passenger side) operates.
Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 2.

2. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) DRIVE SIGNAL

Check voltage between air mix door motor RH harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 3.

3. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) DRIVE SIGNAL CIRCUIT FOR OPEN

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





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) DRIVE SIGNAL CIRCUIT FOR GROUND SHORT

Check continuity between air mix door motor RH harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair harness or connector.

5. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) DRIVE SIGNAL CIRCUIT FOR BATTERY SHORT

1.Turn ignition switch ON.
2.Check voltage between air mix door motor RH harness connector and ground.





Is the inspection result normal?
YES- GO TO 15.
NO- Repair harness or connector.

6. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check air mix door motor (passenger side). .
Is the inspection result normal?
YES- GO TO 7.
NO- Replace air mix door motor (passenger side). Air Mix Door Motor.

7. CHECK INSTALLATION OF AIR MIX DOOR MOTOR (PASSENGER SIDE) CONTROL LINKAGE

Check air mix door motor (passenger side) control linkage is properly installed. Door Motor.
Is the inspection result normal?
YES- GO TO 15.
NO- Repair or replace malfunctioning parts.

8. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR FEEDBACK SIGNAL

Operate temperature control switch (passenger side) and check by voltage between A/C auto amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 15.
NO- GO TO 9.

9. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN

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





Is the inspection result normal?
YES- GO TO 10.
NO- Repair harness or connector.

10. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT

Check continuity between air mix door motor RH harness connector and ground.





Is the inspection result normal?
YES- GO TO 11.
NO- Repair harness or connector.

11. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR POWER SUPPLY

1.Reconnect A/C auto amp. harness connector.
2.Turn ignition switch ON.
3.Check voltage between air mix door motor RH harness connector and ground.





Is the inspection result normal?
YES- GO TO 13.
NO- GO TO 12.

12. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR POWER SUPPLY CIRCUIT FOR OPEN

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





Is the inspection result normal?
YES- GO TO 15.
NO- Repair harness or connector.

13. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR GROUND CIRCUIT

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





Is the inspection result normal?
YES- GO TO 14.
NO- Repair harness or connector.

14. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR

Check air mix door motor (passenger side) PBR. .
Is the inspection result normal?
YES- GO TO 15.
NO- Replace air mix door motor (passenger side). Air Mix Door Motor.

15. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
Is the inspection result normal?
YES- Replace A/C auto amp. Removal And Installation.
NO- Repair or replace malfunctioning parts.


Component Inspection (Motor)


1. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE)

1.Turn ignition switch OFF.
2.Disconnect air mix door motor RH harness connector.
3.Supply air mix door motor (passenger side) terminals with battery voltage and check by visually and operation sound that air mix door motor (passenger side) operates.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace air mix door motor (passenger side). Air Mix Door Motor.


Component Inspection (PBR)


1. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) PBR

Check resistance between air mix door motor (passenger side) PBR terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace air mix door motor (passenger side). Air Mix Door Motor.
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