Nissan Quest E52. Manual - part 316

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< WIRING DIAGRAM >

REAR WINDOW DEFOGGER SYSTEM

JRLWC7485GB

DIAGNOSIS AND REPAIR WORK FLOW

DEF-19

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000009650819

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicle in.

>> GO TO 2.

2.

CHECK FOR DTC

Perform self diagnosis with CONSULT
Is any DTC detected?

YES

>> BCM: Refer to 

BCS-63, "DTC Index"

.

NO

>> GO TO 3.

3.

REPRODUCE THE MALFUNCTION INFORMATION

Check the malfunction on the vehicle that the customer describes.
Inspect the relation of the symptoms and the condition when the symptoms occur.

>> GO TO 4.

4.

IDENTIFY THE MALFUNCTIONING SYSTEM WITH “SYMPTOM DIAGNOSIS”

Use “Symptom diagnosis” from the symptom inspection result in step 3. Then identify where to start perform-
ing the diagnosis based on possible causes and symptoms.

>> GO TO 5.

5.

IDENTIFY MALFUNCTIONING PARTS WITH “COMPONENT DIAGNOSIS”

Perform the diagnosis with “Component diagnosis” of the applicable system.

>> GO TO 6.

6.

REPAIR OR REPLACE THE MALFUNCTIONING PARTS

Repair or replace the specified malfunctioning parts.

>> GO TO 7.

7.

FINAL CHECK

Check that malfunctions are not reproduced when obtaining the malfunction information from the customer,
referring to the symptom inspection result in step 3.
Are all malfunctions corrected?

YES

>> INSPECTION END

NO

>> GO TO 4.

DEF-20

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER SWITCH

DTC/CIRCUIT DIAGNOSIS

REAR WINDOW DEFOGGER SWITCH

WITH AUTO A/C

WITH AUTO A/C : Component Function Check

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1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.

Perform (“REAR DEF SW”) in BCM - REAR DEFOGGER “DATA MONITOR” mode by using CONSULT.

2.

Operate rear window defogger switch and check Monitor Status on CONSULT screen.

Is the inspection result normal?

YES

>> Rear window defogger switch function is OK.

NO

>> Refer to 

DEF-20, "WITH AUTO A/C : Diagnosis Procedure"

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WITH AUTO A/C : Diagnosis Procedure

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1.

CHECK AUTO A/C

Check the operating condition of auto A/C

Does auto A/C operate normally?

YES

>> GO TO 2.

NO

>> Perform auto A/C diagnosis. Refer to 

HAC-73, "Work Flow"

.

2.

CHECK BCM OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C auto amp. connector.

3.

Check voltage between A/C auto amp. harness connector and ground by oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and A/C auto amp. harness connector.

3.

Check continuity between BCM harness connector and ground.

Monitor Item

Condition

Monitor Status

REAR DEF SW

Rear window defogger switch

Pressed

On

Released

Off

(+)

(-)

Voltage

(Approx.)

A/C auto amp.

Connector

Terminal

M50

27

Ground

JPMIA0012GB

BCM

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M121

15

M50

27

Existed

REAR WINDOW DEFOGGER SWITCH

DEF-21

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

REPLACE A/C AUTO AMP.

1.

Turn ignition switch OFF.

2.

Replace A/C auto amp.

3.

Turn ignition switch ON.

4.

Operate rear window defogger switch and check the operating condition.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> GO TO 5.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

>> INSPECTION END

WITH MANUAL A/C

WITH MANUAL A/C : Component Function Check

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1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.

Perform (“REAR DEF SW”) in BCM - REAR DEFOGGER “DATA MONITOR” mode by using CONSULT.

2.

Operate rear window defogger switch and check Monitor Status on CONSULT screen.

Is the inspection result normal?

YES

>> Rear window defogger switch function is OK.

NO

>> Refer to 

DEF-21, "WITH MANUAL A/C : Diagnosis Procedure"

.

WITH MANUAL A/C : Diagnosis Procedure

INFOID:0000000009650823

1.

CHECK MANUAL A/C

Check the operating condition of manual A/C

Does manual A/C operate normally?

YES

>> GO TO 2.

NO

>> Perform manual A/C diagnosis. Refer to 

HAC-191, "Work Flow"

.

2.

CHECK BCM OUTPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect A/C amp. connector.

3.

Check voltage between A/C amp. harness connector and ground by oscilloscope.

BCM

Ground

Continuity

Connector

Terminal

M121

15

Not existed

Monitor Item

Condition

Monitor Status

REAR DEF SW

Rear window defogger switch

Pressed

On

Released

Off