Infiniti QX56 (JA60). Manual - part 504

TURN SIGNAL LAMP CIRCUIT

EXL-45

< COMPONENT DIAGNOSIS >

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Is voltage reading as specified?

YES

>> GO TO 3.

NO

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

3.

CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN 

1. Turn the ignition switch OFF.

2. Disconnect BCM connector M20.

3. Check continuity between the BCM harness connector M20 and

the front turn/fog lamps.

4. Check continuity between the BCM harness connector M20 and

the rear combination lamp connectors. 

5. Check continuity between the BCM harness connector M20 and

the door mirror connectors. 

Are continuity test results as specified?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK TURN SIGNAL LAMP SHORT CIRCUIT

M20

LH

60

Ground

RH

61

PKID0926E

A

B

Continuity

Connector

Terminal

Connector

Terminal

Front LH

M20

60

E101

2

Yes

Front RH

61

E102

ALLIA0722GB

A

B

Continuity

Connector

Terminal

Connector

Terminal

Rear LH

M20

60

B35

4

Yes

Rear RH

61

B105

4

WKIA4774E

A

B

Continuity

Connector

Terminal

Connector

Terminal

Door mirror LH

M20

60

D4

15

Yes

Door mirror RH

61

D107

15

WKIA4524E

EXL-46

< COMPONENT DIAGNOSIS >

TURN SIGNAL LAMP CIRCUIT

Check continuity between the BCM harness connector M20 and

ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> GO TO 5.

5.

CHECK TURN SIGNAL LAMP GROUND CIRCUIT

1. Check continuity between the front turn/fog lamp harness con-

nectors and ground.

2. Check continuity between the rear combination lamp harnness

connectors and ground.

3. Check continuity between the door mirrors and ground. 

Are continuity test results as specified?

YES

>> Replace the malfunctioning lamp.

NO

>> Repair the harnesses or connectors.

Connector

Terminal

—

Continuity

LH

M20

60

Ground

No

RH

61

ALLIA0404GB

Connector

Terminal

—

Continuity

Front LH

E101

3

Ground

Yes

Front RH

E102

ALLIA0721GB

Connector

Terminal

—

Continuity

Rear LH

B35

6

Ground

Yes

Rear RH

B105

WKIA4775E

Connector

Terminal

—

Continuity

Door mirror RH

D107

11

Ground

Yes

Door mirror LH

D4

WKIA4525E

OPTICAL SENSOR

EXL-47

< COMPONENT DIAGNOSIS >

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OPTICAL SENSOR

Description

INFOID:0000000005146657

The optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to

the BCM.

Component Function Check

INFOID:0000000005146658

1.

CHECK OPTICAL SENSOR SIGNAL BY CONSULT-III

CONSULT-III

1. Turn the ignition switch ON.

2. Select "OPTICAL SENSOR" of BCM (HEAD LAMP) DATA MONITOR item.

3. Turn the lighting switch to AUTO.

4. With the optical sensor illuminating, check the monitor status. 

*: Illuminates the optical sensor. The value may be less than the standard value if brightness is weak.

Is the item status normal?

YES

>> Optical sensor is normal.

NO

>> Refer to 

EXL-47, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005146659

Regarding Wiring Diagram information, refer to 

EXL-62, "Wiring Diagram"

.

1.

CHECK OPTICAL SENSOR GROUND CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect BCM connector M18 and optical sensor connector

M302.

3. Check continuity between BCM harness connector M18 (A) ter-

minal 18 and optical sensor harness connector M302 (B) termi-

nal 3.

4. Check continuity between BCM harness connector M18 (A) ter-

minal 18 and ground. 

Are continuity test results as specified?

YES

>> GO TO 2.

NO

>> Repair harness or connector. 

2.

CHECK OPTICAL SENSOR SIGNAL CIRCUIT

Monitor item

Condition

Voltage

OPTICAL SENSOR

When illuminating

3.1V or more *

When shutting off light

0.6V or less

A

B

Connector

Terminal

Connector

Terminal

Continuity

M18

18

M302

3

Yes

A

—

Continuity

Connector

Terminal

M18

18

Ground

No

AWLIA1620ZZ

EXL-48

< COMPONENT DIAGNOSIS >

OPTICAL SENSOR

1. Check continuity between BCM harness connector M20 (A) ter-

minal 58 and optical sensor harness connector M302 (B) termi-

nal 4.

2. Check continuity between BCM harness connector M20 (A) ter-

minal 58 and ground.

Are the continuity test results as specified?

YES

>> Replace the optical sensor. Refer to 

EXL-151, "Removal and Installation"

.

NO

>> Repair harness or connector. 

A

B

Connector

Terminal

Connector

Terminal

Continuity

M20

58

M302

4

Yes

A

—

Continuity

Connector

Terminal

M20

58

Ground

No

AWLIA1621ZZ