Nissan Frontier D40. Manual — part 634
DAYTIME RUNNING LIGHT SYSTEM
EXL-9
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DAYTIME RUNNING LIGHT SYSTEM
System Diagram
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System Description
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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 (lighting and turn signal
switch) to determine when to activate the daytime light system. The BCM sends a daytime light request to the
IPDM E/R via the CAN communication lines. The IPDM E/R grounds the daytime light relay which in turn, pro-
vides 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.
AWLIA1751GB
EXL-10
< FUNCTION DIAGNOSIS >
DAYTIME RUNNING LIGHT SYSTEM
Component Parts Location
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Component Description
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1.
IPDM E/R E119, E122, E123, E124
2.
Parking brake switch B84
3.
BCM M18, M20 (view with lower instru-
ment panel LH removed)
4.
ECM E16 (view with ECM cover re-
moved)
5.
Daytime light relay 1 E103
6.
Daytime light relay 2 E104
7.
Combination switch (lighting and turn
signal switch) M28
8.
Combination meter M24
AWNIA0928ZZ
Part name
Description
BCM
• Receives combination switch (lighting and turn signal switch)
inputs via BCM combination switch reading function.
• Receives park brake applied input from the park brake switch.
• Receives engine running status from the ECM via CAN com-
munication.
DAYTIME RUNNING LIGHT SYSTEM
EXL-11
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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.
Parking brake switch
Outputs parking 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.
EXL-12
< FUNCTION DIAGNOSIS >
AUTO LIGHT SYSTEM
AUTO LIGHT SYSTEM
System Diagram
INFOID:0000000005561489
System Description
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The auto light control system has an optical sensor that detects outside brightness.
When the combination switch (lighting and turn signal 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-27, "HEADLAMP : CONSULT-III Function (BCM - HEAD
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 combination switch (lighting and turn signal switch) position as a part of
the BCM combination switch reading function. When the combination switch (lighting and turn signal switch) is
in the AUTO position, the BCM automatically turns the lamps ON/OFF according to ambient light brightness.
When the key is turned OFF and all doors are closed, the auto light system keeps the headlamps ON for 45
seconds.
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)"
.
AWLIA1752GB
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