Nissan Juke Service and Repair Manual : B27A6, B27A7, B27A8, B27A9 mode 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 mode door motors DTC (B27A6 B27A9) are detected, there is probably a disconnected connector or an open circuit in mode 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-71, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK MODE DOOR MOTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect mode door motor connector.

3. Turn ignition switch ON.

4. Check voltage between mode 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 mode door motor and fuse.

2.CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between mode 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 MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between mode 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 MODE DOOR MOTOR

Check mode door motor. Refer to HAC-72, "Component Inspection".

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

NO >> Replace mode door motor. Refer to HAC-100, "MODE DOOR MOTOR : Removal and Installation".

Component Inspection

1.CHECK MODE DOOR MOTOR

1. Remove mode door motor. Refer to HAC-100, "MODE DOOR MOTOR : Removal and Installation".

2. Check resistance between mode 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 mode door motor. Refer to HAC-100, "MODE DOOR MOTOR : Removal and Installation".

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