Nissan Xterra. Manual - part 414

EXL-144

< SYMPTOM DIAGNOSIS >

EXTERIOR LIGHTING SYSTEM SYMPTOMS

Headlamp is not turned ON/OFF with the lighting 
switch AUTO.

• BCM
• Combination switch (lighting 

and turn signal switch)

• Harness between IPDM E/R 

and the front combination lamp

• IPDM E/R

Combination switch (lighting and 
turn signal switch)
Refer to 

BCS-8

.

• Optical sensor
• Harness between the optical 

sensor and BCM

• BCM

Optical sensor
Refer to 

EXL-64

.

Daytime light system does not activate.

• Either high beam bulb
• Parking brake switch
• Combination switch (lighting 

and turn signal switch)

• BCM
• IPDM E/R
• Daytime light relay 1
• Harness between IPDM E/R 

and daytime light relay 1.

Daytime light system description. 
Refer to 

EXL-9, "System Descrip-

tion"

.

Off-road lamps are not 
turned ON.

One side

• Off-road lamps bulb
• Harness between Off-road 

lamps relay and the Off-road 
lamp assembly

Off-road lamps circuit
Refer to 

EXL-53

.

Both side

• Off-road lamps switch
• Fuse
• Off-road lamps relay
• Off-road lamp cover sensor
• BCM
• Harness between fuse block (J/

B) and the Off-road lamp as-
sembly

• Off-road lamps switch circuit

Refer to 

EXL-48

.

• Off-road lamp cover sensor cir-

cuit
Refer to 

EXL-50

.

• Off-road lamps circuit

Refer to 

EXL-53

.

Off-road lamps are not 
turned OFF

Both side

• Off-road lamps relay
• BCM
• Harness between Off-road 

lamps relay and the BCM

Off-road lamps circuit
Refer to 

EXL-53

Front fog lamp is not 
turned ON.

One side

• Front fog lamp bulb
• Harness between IPDM E/R 

and the front combination lamp

• Front combination lamp
• IPDM E/R

Front fog lamp circuit
Refer to 

EXL-56

.

Both side

Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to 

EXL-151, "Diagnosis Procedure"

.

Parking lamp is not turned 
ON.

One side

• Fuse
• Parking lamp bulb
• Harness between IPDM E/R 

and the front/rear combination 
lamp

• Front/rear combination lamp
• IPDM E/R

Parking lamp circuit
Refer to 

EXL-58

.

Both sides

Symptom diagnosis
"PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED 
ON"
Refer to 

EXL-150, "Diagnosis Procedure"

.

Turn signal lamp does not 
blink.

Indicator lamp is nor-
mal.
(The applicable side 
performs the high flash-
er activation).

• Harness between BCM and 

each turn signal lamp

• Turn signal lamp bulb

Turn signal lamp circuit
Refer to 

EXL-61

.

Symptom

Possible cause

Inspection item

EXTERIOR LIGHTING SYSTEM SYMPTOMS

EXL-145

< SYMPTOM DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Turn signal indicator lamp 
does not blink.

One side

Combination meter

—

Both sides
(Always)

• Turn signal indicator lamp sig-

nal

• Combination meter
• BCM

• Combination meter. 

Data monitor "TURN IND"

• BCM (FLASHER)

Active test "FLASHER"

Both sides
(Does blink when acti-
vating the hazard warn-
ing lamp with the 
ignition switch OFF)

• The combination meter power 

supply and the ground circuit

• Combination meter

Combination meter
Power supply and the ground circuit
Refer to 

MWI-30

.

Symptom

Possible cause

Inspection item

EXL-146

< SYMPTOM DIAGNOSIS >

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000009484941

AUTO LIGHT SYSTEM

The auto light system may not turn the headlamp ON/OFF immediately after passing a dark area or a bright

area (short tunnel, sky bridge, shadowed area etc.). This is normal.

BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM

EXL-147

< SYMPTOM DIAGNOSIS >

C

D

E

F

G

H

I

J

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M

A

B

EXL

N

O

P

BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM

Description

INFOID:0000000009484942

The headlamps (both sides) do not switch to high beam when the combination switch (lighting and turn signal

switch) is in the HI or PASS setting.

Diagnosis Procedure

INFOID:0000000009484943

1.

COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION

Check the combination switch (lighting and turn signal switch). Refer to 

BCS-48, "Symptom Table"

.

Is the combination switch (lighting and turn signal switch) normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning part.

2.

CHECK HEADLAMP (HI) REQUEST SIGNAL INPUT

CONSULT DATA MONITOR

1. Select "HL HI REQ" of IPDM E/R DATA MONITOR item.

2. With operating the combination switch (lighting and turn signal switch), check the monitor status.

Is the item status normal?

YES

>> GO TO 3.

NO

>> Replace BCM. Refer to 

BCS-50, "Removal and Installation"

.

3.

HEADLAMP (HI) CIRCUIT INSPECTION

Check the headlamp (HI) circuit. Refer to 

EXL-39, "Description"

.

Is the headlamp (HI) circuit normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-27, "Removal and Installation"

.

NO

>> Repair or replace the malfunctioning part.

Monitor item

Condition

Monitor status

HL HI REQ

Combination switch (lighting 
and turn signal switch)
(2ND position)

HI or PASS

ON

Except for HI or 
PASS

OFF