Nissan Xterra. Manual - part 471

INL-16

< DTC/CIRCUIT DIAGNOSIS >

BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT

BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT

Description

INFOID:0000000009483124

Provides the battery saver output/power supply. Also cuts the power supply when the interior room lamp bat-

tery saver is activating.

Component Function Check

INFOID:0000000009483125

1.

CHECK BATTERY SAVER OUTPUT/POWER SUPPLY FUNCTION

CONSULT

1. Turn ignition switch ON.

2. Turn each interior room lamp ON.

-

Front room/map lamp assembly

-

Cargo lamp

-

Room lamp 2nd row

3. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.

4.  While operating the test item, check that each interior room lamp turns ON/OFF.

Is the inspection result normal?

YES

>> Battery saver output/power supply circuit is normal.

NO

>> Refer to 

INL-16, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009483126

Regarding Wiring Diagram information, refer to 

INL-35, "Wiring Diagram"

.

1.

CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT

CONSULT

1. Turn ignition switch ON.

2. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active

test item.

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

nector M20 terminal 56 and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Replace BCM after making sure the battery saver output/power supply circuit is not shorted to

voltage. Refer to 

BCS-50, "Removal and Installation"

.

2.

CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OPEN CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect the following connectors.

-

BCM  M20

-

Ignition keyhole illumination (if equipped)

-

Front room/map lamp assembly

-

Cargo lamp

-

Room lamp 2nd row

OFF

: Interior room lamp OFF

ON

: Interior room lamp ON

(+)

(-)

Test item

Voltage

Connector

Terminal

BATTERY SAVER

M20

56

Ground

OFF

0V

ON

Battery voltage

ALLIA0408GB

BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT

INL-17

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3. Check continuity between BCM connector and each interior room lamp connector.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair the harness or connectors.

3.

CHECK BATTERY SAVER OUTPUT/POWER SUPPLY SHORT CIRCUIT

Check continuity between BCM connector M20 terminal 56 and

ground.

Is the inspection result normal?

YES

>> Replace the interior room lamp. Refer to 

INL-59,

"Removal and Installation"

.

NO

>> Repair the harness or connectors.

BCM

Interior room lamp

Continuity

Connector

Terminal

Connector

Terminal

M20

56

Ignition keyhole illumination (if equipped)

M150

1

Yes

Front room/map lamp assembly

R9

1

Cargo lamp

R11

2

Room lamp 2nd row

R12

2

Connector

Terminal

—

Continuity

M20

56

Ground

No

ALLIA0409GB

INL-18

< DTC/CIRCUIT DIAGNOSIS >

INTERIOR ROOM LAMP CONTROL CIRCUIT

INTERIOR ROOM LAMP CONTROL CIRCUIT

Description

INFOID:0000000009483127

Controls the following interior room lamps (ground side) by PWM signal.

• Front room/map lamp assembly

• Room lamp 2nd row

NOTE:

PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).

Component Function Check

INFOID:0000000009483128

CAUTION:

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

• Battery saver output/power supply

• Front room/map lamp bulbs

• Room lamp 2nd row bulb

1.

CHECK INTERIOR ROOM LAMP CONTROL FUNCTION

CONSULT

1. Switch the front room/map lamp assembly and room lamp 2nd row switches to DOOR.

2. Turn ignition switch ON.

3. Select “INT LAMP” of BCM (INT LAMP) active test item.

4. While operating the test item, check that each interior room lamp turns ON/OFF (gradual brightening/dim-

ming).

Is the inspection result normal?

YES

>> Interior room lamp control circuit is normal.

NO

>> Refer to 

INL-18, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009483129

Regarding Wiring Diagram information, refer to 

INL-35, "Wiring Diagram"

.

1.

CHECK INTERIOR ROOM LAMP CONTROL OUTPUT

CONSULT

1. Turn ignition switch ON.

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

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

nector M20 terminal 63 and ground.

Is the inspection result normal?

YES

>> Interior room lamp control circuit is operating normally.

Fixed ON>> GO TO 3

Fixed OFF>> GO TO 2

2.

CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

ON

: Interior room lamp gradual brightening

OFF

: Interior room lamp gradual dimming

(+)

(-)

INT LAMP

Voltage

Connector

Terminal

M20

63

Ground

ON

0V

OFF

Battery voltage

ALLIA0410GB

INTERIOR ROOM LAMP CONTROL CIRCUIT

INL-19

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1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, room lamp 2nd row connector

and front room/map lamp connector.

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

and interior room lamp connectors.

Is the inspection result normal?

YES

>> Check interior room lamp for an open. If OK, replace the

BCM. Refer to 

BCS-50, "Removal and Installation"

. If

NG, replace the interior room lamp. Refer to 

INL-59,

"Removal and Installation"

.

NO

>> Repair the harness or connectors.

3.

CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector M20, room lamp 2nd row connector

and front room/map lamp connector.

3. Check continuity between BCM connector M20 terminal 63 and

ground.

Is the inspection result normal?

YES

>> Check interior room lamp for a short circuit. If OK,

replace the BCM. Refer to 

BCS-50, "Removal and

Installation"

. If NG, replace the interior room lamp. Refer to 

INL-59, "Removal and Installation"

.

NO

>> Repair the harness or connectors.

Terminal

Terminal

Continuity

Connector

Terminal

Component

Connector

Terminal

M20 (A)

63

Room lamp 2nd 
row 

R12 (B)

1

Yes

Front room/map 
lamp 

R9 (C)

2

AWLIA0727ZZ

Connector

Terminal

—

Continuity

M20

63

Ground

No

ALLIA0413GB