Nissan Pathfinder (2009 year). Instruction — part 402
EXL-6
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
YES
>> GO TO 5
NO
>> GO TO 11
11.
REPAIR CHECK (OPERATION CHECK)
Check the operation of each part.
Does it operate normally?
YES
>> Inspection End.
NO
>> GO TO 3
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
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)"
.
ALLIA0381ZZ
2009 Pathfinder
AUTO LIGHT SYSTEM
EXL-13
< 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
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