Nissan Juke Service and Repair Manual : B27A2, B27A3, B27A4, B27A5 air mix door motor

DTC Logic

DTC DETECTION LOGIC

NOTE

:
If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC- 51, "DTC Logic".

If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. HAC-52, "DTC Logic".

If air mix door motors DTC (B27A2 B27A5) are detected, there is probably a disconnected connector or an open circuit in air mix door motor drive power supply harness.

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.With CONSULT-III


1. Turn ignition switch ON.

2. Select Self Diagnostic Result mode of HVAC using CONSULT-III.

3. Check DTC.

Is DTC detected? YES >> Refer to HAC-69, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK AIR MIX DOOR MOTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect air mix door motor connector.

3. Turn ignition switch ON.

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

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 2.

NO >> Repair harness or connector between air mix door motor and fuse.

2.CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between air mix door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> Repair harness or connector.

3.CHECK AIR MIX DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between air mix door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 4.

NO >> Repair harness or connector.

4.CHECK AIR MIX DOOR MOTOR

Check air mix door motor. Refer to HAC-70, "Component Inspection".

Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-91, "Removal and Installation".

NO >> Replace air mix door motor. Refer to HAC-100, "AIR MIX DOOR MOTOR : Removal and Installation".

Component Inspect

1.CHECK AIR MIX DOOR MOTOR

1. Remove air mix door motor. Refer to HAC-100, "AIR MIX DOOR MOTOR : Removal and Installation".

2. Check resistance between air mix door motor terminals. Refer to applicable table for the normal value.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace air mix door motor. Refer to HAC-100, "AIR MIX DOOR MOTOR : Removal and Installation".

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