Nissan Frontier. Manual - part 800

TRAILER TOW

EXL-125

< WIRING DIAGRAM >

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ABLIA5658GB

EXL-126

< SYMPTOM DIAGNOSIS >

EXTERIOR LIGHTING SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

EXTERIOR LIGHTING SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000009478505

CAUTION:

Perform the self-diagnosis with CONSULT before the symptom diagnosis. Perform the trouble diagno-

sis if any DTC is detected.

Symptom

Possible cause

Inspection item

Headlamp does not 
switch to the high beam.

One side

• Fuse
• Harness between IPDM E/R 

and the front combination lamp

• Front combination lamp
• IPDM E/R

Headlamp (HI) circuit
Refer to 

EXL-36

.

Both sides

Symptom diagnosis
 "BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to 

EXL-129, "Diagnosis Procedure"

.

High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.)

• Combination meter
• BCM

• Combination meter. 

Data monitor "HI-BEAM IND"

• BCM (HEAD LAMP)

Active test "HEADLAMP"

Headlamp does not 
switch to the low beam.

One side

• Daytime light relay 2
• Harness between IPDM, day-

time light relay 2 and front com-
bination lamp LH.

• Front combination lamp (Low 

beam)

Headlamp (LO) circuit
Refer to 

EXL-39

.

Both sides

• Combination switch (lighting 

and turn signal switch)

• Harness between the combina-

tion switch (lighting and turn sig-
nal switch) and BCM

• BCM

Combination switch (lighting and 
turn signal switch)
Refer to 

BCS-47

.

High beam request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "HL HI REQ"

IPDM E/R

—

Headlamp does not turn 
ON.

One side

• Fuse
• Bulb
• Harness between IPDM E/R 

and the front combination lamp

• Front combination lamp
• IPDM E/R

Headlamp (LO) circuit
Refer to 

EXL-39

.

Both sides

Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to 

EXL-131, "Diagnosis Procedure"

.

Headlamp does not turn 
OFF.

When the ignition 
switch is turned ON

• BCM
• Combination switch (lighting 

and turn signal switch)

Combination switch (lighting and 
turn signal switch)
Refer to 

BCS-47

.

EXTERIOR LIGHTING SYSTEM SYMPTOMS

EXL-127

< SYMPTOM DIAGNOSIS >

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

• Combination switch (lighting 

and turn signal switch)

• Harness between the combina-

tion switch (lighting and turn sig-
nal switch) and BCM

• BCM
• IPDM E/R

Combination switch (lighting and 
turn signal switch)
Refer to 

BCS-47

.

• Optical sensor
• Harness between the optical 

sensor and BCM

• BCM

Optical sensor
Refer to 

EXL-53

.

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"

.

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-45

.

Both side

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

EXL-133, "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-47

.

Both sides

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

EXL-132, "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-50

.

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

Power supply and the ground circuit
Refer to 

MWI-31

.

Symptom

Possible cause

Inspection item

EXL-128

< SYMPTOM DIAGNOSIS >

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000009478506

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.