Nissan Pathfinder (2009 year). Manual - part 402

EXL-6

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

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11.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.

Does it operate normally?

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2009 Pathfinder

HEADLAMP

EXL-7

< FUNCTION DIAGNOSIS >

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FUNCTION DIAGNOSIS

HEADLAMP

System Diagram

INFOID:0000000003939582

System Description

INFOID:0000000003939583

Control of the headlamp system operation is dependent upon the position of the lighting switch (combination
switch). When the lighting switch is placed in the 2nd position, the BCM (body control module) receives input
requesting the headlamps and park lamps to illuminate. This input is communicated to the IPDM E/R (intelli-
gent power distribution module engine room) via the CAN communication lines. The CPU (central processing
unit) of the IPDM E/R controls the headlamp high and headlamp low relay coils. When energized, these relays
direct power to the respective headlamps, which then illuminate.

HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION

With the lighting switch in the 2ND position and placed in HIGH position, the BCM receives input requesting
the headlamp high beams to illuminate. The flash to pass feature can be used any time and also sends a sig-
nal to the BCM. This input is communicated to the IPDM E/R via the CAN communication lines. The CPU of
the combination meter controls the ON/OFF status off the HIGH BEAM indicator. The CPU of the IPDM E/R
controls the headlamp high relay coil which supplies power to the high beam headlamps.
The combination meter receives a high beam request signal (ON) via the CAN communication lines and turns
the high beam indicator lamp ON.

Component Parts Location

INFOID:0000000003939584

AWLIA0002GB

WKIA4957E

2009 Pathfinder

EXL-8

< FUNCTION DIAGNOSIS >

HEADLAMP

Component Description

INFOID:0000000003939585

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter M24

Part name

Description

BCM

• Receives lighting switch requests via BCM combination switch 

reading function.

• Sends headlamp high/low request signal to the IPDM E/R.

IPDM E/R

Activates the headlamp high and headlamp low relays upon re-
quest from the BCM.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.

2009 Pathfinder

DAYTIME RUNNING LIGHT SYSTEM

EXL-9

< FUNCTION DIAGNOSIS >

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DAYTIME RUNNING LIGHT SYSTEM

System Diagram

INFOID:0000000003939586

System Description

INFOID:0000000003939587

The headlamp system for Canada vehicles is equipped with a daytime light control that activates the high
beam headlamps at approximately half illumination whenever the engine is operating. If the parking brake is
applied before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate
once the parking brake is released. Thereafter, the daytime lights will continue to operate when the parking
brake is applied.

OPERATION

The BCM monitors inputs from the parking brake switch and the combination switch to determine when to acti-
vate the daytime light system.  The BCM sends a daytime light request to the IPDM E/R via the CAN commu-
nication lines.  The IPDM E/R grounds the daytime light relay which in turn, provides power to the ground side
of the LH high beam lamp.  Power flows backward through the LH high beam lamp to the IPDM E/R, through
the high beam fuses, through the RH high beam lamp circuit to the RH high beam lamp and on to ground.  The
high beam lamps are wired in series which causes them to illuminate at a reduced intensity. 

ALLIA0621GB

2009 Pathfinder

EXL-10

< FUNCTION DIAGNOSIS >

DAYTIME RUNNING LIGHT SYSTEM

Component Parts Location

INFOID:0000000003939588

Component Description

INFOID:0000000003939589

1.

IPDM E/R E119, E122, E123, E124

2.

Parking brake switch E53

3.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

4.

ECM E16 (view with ECM cover re-
moved)

5.

Generator E205, E209

6.

Daytime light relay 1, E103

7.

Daytime light relay 2, E104

8.

Combination switch (lighting and turn 
signal switch) M28

9.

Combination meter M24

WKIA4958E

Part name

Description

BCM

• Receives combination switch inputs via BCM combination 

switch reading function.

• Recieves park brake applied input from the park brake switch.
• Receives engine running status from the ECM via CAN com-

munication. 

IPDM E/R

Receives daytime light request from the BCM and activates the 
daytime light relay.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.

2009 Pathfinder

DAYTIME RUNNING LIGHT SYSTEM

EXL-11

< FUNCTION DIAGNOSIS >

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Park brake switch

Outputs park brake status to the combination meter which for-
wards that information to the BCM via CAN communication.

ECM

Outputs engine running status to the BCM.

2009 Pathfinder

EXL-12

< FUNCTION DIAGNOSIS >

AUTO LIGHT SYSTEM

AUTO LIGHT SYSTEM

System Diagram

INFOID:0000000003939590

System Description

INFOID:0000000003939591

The auto light control system has an optical sensor that detects outside brightness.
When the lighting switch is in AUTO position, it automatically turns ON/OFF the parking, license plate, tail and
headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details,
Refer to 

EXL-26, "HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)"

.

AUTO LIGHT OPERATION

The auto light system operates the low beam and high beam headlamps, parking lamps, tail lamps and license
plate lamps. The BCM monitors the lighting switch (combination switch) position as a part of the BCM combi-
nation switch reading function.  When the lighting switch is in the AUTO position, the BCM automatically turns
the lamps ON/OFF according to ambient light brightness.   
NOTE:
Timing for when lamps turn ON/OFF can be changed by the function setting of CONSULT-III. Refer to 

EXL-26,

"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)"

.

ALLIA0381ZZ

2009 Pathfinder

AUTO LIGHT SYSTEM

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< FUNCTION DIAGNOSIS >

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Component Parts Location

INFOID:0000000003939592

Component Description

INFOID:0000000003939593

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M19,  M20 (view with lower  
instrument panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter M24

5.

Rear door switch
LH B18
RH B116

6.

Optical sensor M145

7.

Back door latch (door ajar switch) 
D502

8.

Front door switch
LH B8
RH B108

WKIA4959E

Part name

Description

BCM

BCM (Body Control Module) controls auto light operation accord-
ing to signals from optical sensor, lighting switch and ignition 
switch.

IPDM E/R

IPDM E/R (Intelligent Power Distribution Module Engine Room) 
operates parking, license plate, tail and headlamps according to 
CAN communication signals from BCM.

2009 Pathfinder