Infiniti QX56 (JA60). Manual - part 623

INL-20

< COMPONENT DIAGNOSIS >

INTERIOR ROOM LAMP CONTROL CIRCUIT

2.

CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, door mirror connectors and

front room/map lamp assembly connector.

3. Check continuity between BCM connector M20 (A) terminal 63

and the door mirror connectors (B) and front room/map lamp

assembly connector (C).

4. Reconnect the front room/map lamp assembly connector. 

5. Check continuity between BCM connector M20 (A) terminal 63

and the 2nd and 3rd row personal lamp connectors (B) terminal

1.

Is the inspection result normal?

YES

>> Check interior room lamps for an open. If OK, replace BCM. Refer to 

BCS-59, "Removal and

Installation"

. If NG, replace interior room lamp. Refer to 

INL-77, "Removal and Installation"

 or 

MIR-

17, "Door Mirror Assembly"

.

NO

>> Repair the harness or connectors.

3.

CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, door mirror connectors and

2nd and 3rd row personal lamp connectors.

3. Switch the front room/map lamp assembly switch to ON posi-

tion. 

4. Check continuity between BCM connector M20 terminal 63 and

ground.

Is the inspection result normal?

YES

>> Check interior room lamps for a short circuit. If OK, replace BCM. Refer to 

BCS-59, "Removal and

Installation"

. If NG, replace interior room lamp. Refer to 

INL-77, "Removal and Installation"

 or 

MIR-

17, "Door Mirror Assembly"

.

BCM

Interior room lamp

Continuity

Connector

Terminal

Component

Connector

Terminal

M20 (A)

63

Door mirror LH

D4 (B)

13

Yes

Door mirror RH

D107 (B)

13

Front room/map 
lamp assembly 

R102 (C)

1

AWLIA0968ZZ

BCM

Interior room lamp

Continuity

Connector

Terminal

Component

Connector

Terminal

M20 (A)

63

Personal lamp 2nd 
row

R203 (B)

1

Yes

Personal lamp 3rd 
row

R205 (B)

1

ALLIA0412GB

Connector

Terminal

—

Continuity

M20

63

Ground

No

ALLIA0413GB

INTERIOR ROOM LAMP CONTROL CIRCUIT

INL-21

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

INL

N

O

P

NO

>> Repair the harness or connectors.

INL-22

< COMPONENT DIAGNOSIS >

STEP LAMP CIRCUIT

STEP LAMP CIRCUIT

Description

INFOID:0000000005146733

Controls the front and rear step lamps and the foot lamps (ground side) to turn the lamps ON and OFF.

Component Function Check

INFOID:0000000005146734

CAUTION:

 Before performing the diagnosis, check that the following is normal.

• Battery saver output/power supply

• Front step lamp bulbs

• Rear step lamp bulbs

• Foot lamp bulbs

1.

CHECK STEP LAMP OPERATION

CONSULT-III

1. Turn ignition switch ON.

2. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.

3. While operating the test item, check that the front/rear step lamps and foot lamps turn ON/OFF.

Is the inspection result normal?

YES

>> Step lamp circuit is normal.

NO

>> Refer to 

INL-22, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005146735

Regarding Wiring Diagram information, refer to 

INL-28, "Wiring Diagram"

.

1.

CHECK STEP LAMP OUTPUT

CONSULT-III

1. Turn ignition switch ON.

2. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.

3. While operating the test item, check voltage between BCM har-

ness connector M20 terminal 62 and ground.

Is the inspection result normal?

YES

>> Step lamp circuit is operating normally.

Fixed ON>>GO TO 3

Fixed OFF>>GO TO 2

2.

CHECK STEP LAMP OPEN CIRCUIT

ON

: Step lamp ON

OFF

: Step lamp OFF

Connector

Terminal

—

STEP LAMP 

TEST

Voltage

M20

62

Ground

ON

0V

OFF

Battery voltage

ALLIA0414GB

STEP LAMP CIRCUIT

INL-23

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

INL

N

O

P

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, front step lamp, rear step lamp

and foot lamp connectors.

3. Check continuity between BCM connector M20 (A) terminal 62

and step lamp connectors (B) and foot lamp connectors (C).

Is the inspection result normal?

YES

>> Check step lamp or foot lamp for an open. If OK, replace

BCM. Refer to 

BCS-59, "Removal and Installation"

. If

NG, replace step lamp or foot lamp. Refer to 

INL-77,

"Removal and Installation"

.

NO

>> Repair harness or connectors.

3.

CHECK STEP LAMP SHORT CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, front and rear step lamp con-

nectors and foot lamp connectors.

3. Check continuity between BCM connector M20 terminal 62 and

ground.

Is the inspection result normal?

YES

>> Check step lamp or foot lamp for a short circuit. If OK,

replace BCM. Refer to 

BCS-59, "Removal and Installa-

tion"

. If NG, replace step lamp or foot lamp. Refer to 

INL-77, "Removal and Installation"

.

NO

>> Repair the harness or connectors.

Connector

Terminal

Connector

Terminal

Continuity

M20 (A)

62

Front step lamp LH

D11 (B)

2

Yes

Front step lamp RH

D109 (B)

2

Rear step lamp LH

D206 (B)

2

Rear step lamp RH

D306 (B)

2

Foot lamp LH

M99 (C)

2

Foot lamp RH

M100 (C)

2

ALLIA0415GB

Connector

Terminal

—

Continuity

M20

62

Ground

No

ALLIA0416GB