Nissan Juke Service and Repair Manual : B257B, B257C ambient sensor

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- 275, "DTC Logic".

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. HAC-276, "DTC Logic".

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 “PTC HEATER” using CONSULT-III.

3. Check DTC.

Is DTC detected? YES >> Refer to HAC-277, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK AMBIENT SENSOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect ambient sensor connector.

3. Turn ignition switch ON.

4. Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?


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

NO >> GO TO 4.

2.CHECK AMBIENT SENSOR GROUND CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect PTC heater control unit connector.

3. Check continuity between ambient sensor 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 AMBIENT SENSOR

Check ambient sensor. Refer to HAC-278, "Component Inspection".

Is the inspection result normal? YES >> Replace PTC heater control unit.

NO >> Replace ambient sensor.

4.CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect PTC heater control unit connector.

3. Check continuity between ambient sensor harness connector and PTC heater control unit harness connector.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 5.

NO >> Repair harness or connector.

5.CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between ambient sensor harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> Replace PTC heater control unit.

NO >> Repair harness or connector.

Component Inspection

1.CHECK AMBIENT SENSOR

1. Remove ambient sensor.

2. Check resistance between ambient sensor terminals. Refer to applicable table for the normal value.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace ambient sensor.

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