Nissan Xterra. Manual - part 390

EXL-48

< DTC/CIRCUIT DIAGNOSIS >

OFF-ROAD LAMPS SWITCH CIRCUIT

OFF-ROAD LAMPS SWITCH CIRCUIT

Description

INFOID:0000000009484898

The off-road lamps switch sends a momentary ground signal to the BCM requesting the off-road lamps be acti-

vated. The BCM controls the off-road lamps relay based on inputs from the combination switch (lighting and

turn signal switch), the off-road lamps switch and the off-road lamp cover sensors. If the headlamps are on

high beam, the off-road lamp covers are removed and the off-road lamps switch is activated, the BCM grounds

the off-road lamp relay. When the off-road lamps relay is energized, power flows from the off-road lamps relay

to the off-road lamps assembly. 

Component Function Check

INFOID:0000000009484899

1.

CHECK OFF-ROAD LAMPS SWITCH OPERATION

Check that the indicator lamp on the off-road lamps switch illuminates from the off-road lamps switch, combi-

nation switch (lighting and turn signal switch) and off-road lamp cover sensor.
Is the inspection result normal?

YES

>> Off-road lamps switch function is OK.

NO

>> Inoperative from off-road lamps switch only, refer to 

EXL-48, "Diagnosis Procedure"

. 

Diagnosis Procedure

INFOID:0000000009484900

Regarding Wiring Diagram information, refer to 

EXL-106, "Wiring Diagram"

.

1.

CHECK OFF-ROAD LAMPS SWITCH VOLTAGE

1. Turn the ignition switch OFF.

2. Disconnect the off-road lamps switch connector M80.

3. Turn the ignition switch ON.

4. Check the voltage between the off-road lamps switch connector

M80 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> GO TO 2.

2.

CHECK OFF-ROAD LAMPS SWITCH SIGNAL CIRCUIT

1. Turn the ignition switch OFF. 

2. Disconnect BCM connector M18.

3. Check continuity between the off-road lamps switch harness

connector (A) and BCM harness connector (B).

4. Check continuity between the off-road lamps switch harness

connector (A) and ground.

(+)

(

−)

Voltage

Connector

Terminal

M80

1

Ground

5V

AWLIA1701ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M80

1

M18

31

Yes

AWLIA1702ZZ

OFF-ROAD LAMPS SWITCH CIRCUIT

EXL-49

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-50, "Removal and Installation"

.

NO

>> Repair the harness.

3.

CHECK OFF-ROAD LAMPS SWITCH GROUND CIRCUIT

1. Turn the ignition switch OFF.

2. Check continuity between the off-road lamps switch harness

connector M80 terminals 2, 6 and ground.

Does continuity exist?

YES

>> GO TO 4

NO

>> Repair the harness or connector.

4.

CHECK OFF-ROAD LAMPS SWITCH INDICATOR CIRCUIT

1. Disconnect off-road lamps relay.

2. Check continuity between the off-road lamps relay harness connector and off-road lamps switch harness

connector.

Does continuity exist?

YES

>> Check off-road lamps circuit. If OK, Replace off-road lamps switch. If NG, refer to 

EXL-53, "Diag-

nosis Procedure"

.

NO

>> Repair and replace the harness.

A

—

Continuity

Connector

Terminal

M80

1

Ground

No

Connector

Terminal

—

Continuity

M80

2

Ground

Yes

6

AWLIA1703ZZ

Off-road lamps relay

Off-road lamps switch

Continuity

Connector

Terminal

Connector

Terminal

M81

5

M80

5

Yes

EXL-50

< DTC/CIRCUIT DIAGNOSIS >

OFF-ROAD LAMP COVER SENSOR CIRCUIT

OFF-ROAD LAMP COVER SENSOR CIRCUIT

Description

INFOID:0000000009484901

The off-road lamp cover sensors sense the presence of the off-road lamp covers. If the off-road lamp covers

are installed on the vehicle, the BCM will not activate the off-road lamps. The BCM controls the off-road lamps

relay based on inputs from the combination switch (lighting and turn signal switch), the off-road lamps switch

and the off-road lamp cover sensors. When the off-road lamps relay is energized, power flows from the off-

road lamps relay to the off-road lamps assembly. 

Component Function Check

INFOID:0000000009484902

1.

CHECK OFF-ROAD LAMPS SWITCH OPERATION

Check that the indicator lamp on the off-road lamps switch illuminates from the off-road lamps switch, combi-

nation switch (lighting and turn signal switch) and off-road lamp cover sensor.
Is the inspection result normal?

YES

>> Off-road lamps switch function is OK.

NO

>> Inoperative from off-road lamp cover sensor only, refer to 

EXL-50, "Diagnosis Procedure"

. 

Diagnosis Procedure

INFOID:0000000009484903

Regarding Wiring Diagram information, refer to 

EXL-106, "Wiring Diagram"

.

1.

CHECK OFF-ROAD LAMPS FUSE

1. Turn the ignition switch OFF.

2. Check that the following fuse is not open.

Is the fuse open?

YES

>> Replace the fuse after repairing the affected circuit.

NO

>> GO TO 2

2.

CHECK OFF-ROAD LAMP COVER SENSOR POWER SUPPLY

1. Disconnect the off-road lamp assembly connectors.

2. Turn the ignition switch ON.

3. Check the voltage between the off-road lamp assembly connec-

tors and ground.

Is battery voltage present?

YES

>> GO TO 3

NO

>> GO TO 6

3.

CHECK OFF-ROAD LAMP COVER SENSOR GROUND CIRCUIT

1. Turn the ignition switch OFF.

Unit

Location

Fuse No.

Capacity

Off-road lamp cover sensor 

Fuse block (J/B)

12

10A

(+)

(

−)

Voltage

Connector

Terminal

LH

B527

1

Ground

Battery voltage

RH

B529

1

AWLIA1704ZZ

OFF-ROAD LAMP COVER SENSOR CIRCUIT

EXL-51

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

2. Check continuity between the off-road lamp assembly harness

connectors and ground.

Does continuity exist?

YES

>> GO TO 4.

NO

>> Repair the harness.

4.

CHECK OFF-ROAD LAMP COVER SENSOR OUTPUT SIGNAL

1. Disconnect BCM connector M19 and connect the off-road lamp assembly.

2. Remove off-road lamp cover.

3. Turn the ignition switch ON.

4. Check voltage between off-road lamp cover sensor harness connector and ground.

Is inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-50, "Removal and Installation"

.

NO

>> GO TO 5

5.

CHECK OFF-ROAD LAMP COVER SENSOR SIGNAL CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect off-road lamp assembly.

3. Check continuity between the off-road lamp assembly harness

connectors (A) and BCM harness connector (B).

4. Check continuity between the off-road lamp assembly harness

connector and ground.

Is inspection result normal?

YES

>> Replace the off-road lamp cover sensor.

NO

>> Repair the harness.

6.

CHECK OFF-ROAD LAMP COVER SENSOR CIRCUIT FOR OPEN

1. Turn the ignition switch OFF.

2. Disconnect fuse block (J/B) connector M4.

3. Check continuity between the off-road lamp assembly harness connector and fuse block (J/B) harness

connector.

Connector

Terminal

—

Continuity

LH

B527

2

Ground

Yes

RH

B529

2

AWLIA1705ZZ

(+)

(-)

Voltage

Connector

Terminal

LH

B527

3

Ground

5V

RH

B529

3

A

B

Continuity

Connector

Terminal

Connector

Terminal

LH

B527

3

M19

42

Yes

RH

B529

3

A

—

Continuity

Connector

Terminal

LH

B527

3

Ground

No

RH

B529

3

AWLIA1706ZZ