Nissan Maxima. Instruction — part 608
EXL-174
< SYSTEM DESCRIPTION >
[HALOGEN TYPE]
HEADLAMP
SYSTEM DESCRIPTION
HEADLAMP
System Diagram
INFOID:0000000010051021
System Description
INFOID:0000000010051022
Control of the headlamp system operation is dependent upon the position of the combination switch (lighting
and turn signal 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 (intelligent power distribution module engine room) across 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.
Component Parts Location
INFOID:0000000010051023
ABLIA2706GB
AWLIA1631ZZ
HEADLAMP
EXL-175
< SYSTEM DESCRIPTION >
[HALOGEN TYPE]
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Component Description
INFOID:0000000010051024
LOW BEAM OPERATION
When the lighting switch is in 2ND position, the BCM receives input requesting the headlamps to illuminate.
This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R
controls the headlamp low relay coil which supplies power to the low beam headlamps.
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 across 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) through the CAN communication lines and
turns the high beam indicator lamp ON.
EXTERIOR LAMP BATTERY SAVER CONTROL
With the lighting switch (combination switch) in the 2nd position and the ignition switch is turned from ON or
ACC to OFF, the battery saver feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes unless the lighting switch position is
changed. If the lighting switch position is changed, then the headlamps are turned off.
This setting can be changed by CONSULT. Refer to
EXL-193, "BATTERY SAVER : CONSULT Function (BCM
1.
IPDM E/R E17, E18, E200
2.
BCM M16, M17, M18, M19 (view with
combination meter removed)
3.
Combination switch (lighting and turn
signal switch) M28
4.
Combination meter M24
EXL-176
< SYSTEM DESCRIPTION >
[HALOGEN TYPE]
DAYTIME RUNNING LIGHT SYSTEM
DAYTIME RUNNING LIGHT SYSTEM
System Diagram
INFOID:0000000010051025
System Description
INFOID:0000000010051026
The headlamp system for Canada vehicles is equipped with a daytime light relay that activates the high beam
headlamps at approximately half illumination whenever the engine is running. If the parking brake is
depressed before the engine is started, the daytime lights will not be illuminated. The daytime lights will illumi-
nate once the parking brake is released. Thereafter, the daytime lights will continue to operate when the park-
ing brake is depressed.
Component Parts Location
INFOID:0000000010051027
ABLIA2702GB
1.
IPDM E/R E17, E18, E200, E201
2.
BCM M16,M17, M18, M19 (view with
combination meter removed)
3.
Combination switch (lighting and turn
signal switch) M28
4.
Combination meter M24
5.
Parking brake switch E35
6.
Daytime light relay E228
AWLIA1632ZZ
DAYTIME RUNNING LIGHT SYSTEM
EXL-177
< SYSTEM DESCRIPTION >
[HALOGEN TYPE]
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Component Description
INFOID:0000000010051028
After starting the engine with the parking brake released and the lighting switch in the OFF or 1ST position, the
headlamp high beam automatically turns on. With the lighting switch in the 2nd position or with autolamps ON,
the headlamps function the same as conventional light systems.
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 RH high beam lamp. Power flows backward through the RH high beam
lamp to the IPDM E/R, through the high beam fuses, through the LH high beam lamp circuit to the LH high
beam lamp and on to ground. The high beam lamps are wired in series which causes them to illuminate at a
reduced intensity.
• Hi: "HIGH BEAM" position
• Lo: "LOW BEAM" position
• P: "FLASH TO PASS" position
•
×: Lamp "ON"
• –: Lamp "OFF"
• z: Lamp dims. (Added functions)
• *: When starting the engine with the parking brake released, the daytime lights will operate.
When starting the engine with the parking brake depressed, the daytime lights will not operate.
Engine
With engine stopped
With engine running
Lighting switch
OFF 1ST 2ND OFF 1ST 2ND
Hi
Lo
P
Hi
Lo
P
Hi
Lo
P
Hi
Lo
P
Hi
Lo
P
Hi
Lo
P
Headlamp
High beam
–
–
–
–
–
×
×
–
×
z
*
z
*
×
z
*
z
*
×
×
–
×
Low beam
–
–
–
–
–
×
×
×
×
–
–
×
–
–
×
×
×
×
Tail lamp
–
–
–
×
×
×
×
×
×
–
–
–
×
×
×
×
×
×
License and instrument illumina-
tion lamp
–
–
–
×
×
×
×
×
×
–
–
–
×
×
×
×
×
×
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