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DAYTIME LIGHT SYSTEMEXL-9
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DAYTIME LIGHT SYSTEM
System DiagramINFOID:0000000005369869
System DescriptionINFOID:0000000005146609
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 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.
Component Parts LocationINFOID:0000000005146610
AWLIA1751GB
AWLIA1626ZZ
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EXL-10
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DAYTIME LIGHT SYSTEM
Component Description
INFOID:0000000005369870
After starting the engine with the parking brake releas ed and the combination switch (lighting and turn signal
switch) in the OFF or 1ST position, the headlamp high beam automatically turns on at a reduced intensity.
With the combination switch (lighting and turn signal 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 swit ch 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.
1. IPDM E/R E119, E122, E123, E124 2. BCM M18, M20 (view with instrument
panel removed)3. Daytime light relay E103
4. Combination switch (lighting and turn signal switch) M28 5. Combination meter M23, M24 6. Parking brake switch M11
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AUTO LIGHT SYSTEMEXL-11
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AUTO LIGHT SYSTEM
System DiagramINFOID:0000000005146612
System DescriptionINFOID:0000000005146613
• BCM (Body Control Module) controls auto light operati on according to signals from optical sensor, combina-
tion switch (lighting and turn signal switch) and ignition switch.
• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate, tail and
headlamps according to CAN communication signals from BCM.
• Optical sensor detects ambient br ightness and converts light (lux) to voltage, then sends the optical sensor
signal to BCM.
OUTLINE
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 of the setting, Refer to BCS-22, "
HEADLAMP : CONSULT-III Function
(BCM - HEAD LAMP)".
AWLIA1752GB
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EXL-12
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AUTO LIGHT SYSTEM
Component Parts Location
INFOID:0000000005146614
Component DescriptionINFOID:0000000005146615
AUTO LIGHT OPERATION
The auto light system operates t he 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 (lighting and turn signal 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.
NOTE:
Timing for when lamps turn ON/OFF can be changed by the function setting of CONSULT-III. Refer to BCS-22,
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)".
1. BCM M18, M19, M20 (view with instru-
ment panel removed) 2. IPDM E/R E122, E123, E124 3. Optical sensor M302
4. Front door switch LH B8
RH B108 5. Rear door switch
LH B18
RH B116 6. Back door latch (door ajar switch)
D503
7. Combination switch (lighting and turn signal switch) M28
AWLIA1627ZZ
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HEADLAMP AIMING SYSTEM (MANUAL)EXL-13
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HEADLAMP AIMING SYSTEM (MANUAL)
System DiagramINFOID:0000000005146616
System DescriptionINFOID:0000000005146617
The headlamp aiming system (manual) controls the headlamp light axis height according to input from the
headlamp aiming switch. The variable internal resistance of the headlamp aiming switch controls the signal
ground of the headlamp aiming motors located on the front combination lamp LH and RH.
Component Parts LocationINFOID:0000000005146618
Component DescriptionINFOID:0000000005146619
AWLIA1717GB
1. BCM M18, M20 (view with instrument
panel removed) 2. IPDM E/R E121, E122, E123, E124 3. Combination switch (lighting and turn
signal switch) M28
4. Headlamp aiming switch M148
AWLIA0508ZZ
Part Description
Headlamp aiming motor Moves the headlamp up/down based on input from the headlamp aiming switch.
Headlamp aiming switch Controls variable ground to the headlamp aiming motor signal to move the headlamp aim-
ing motor up/down.
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EXL-14
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FRONT FOG LAMP
FRONT FOG LAMP
System DiagramINFOID:0000000005369879
System DescriptionINFOID:0000000005369880
The front fog lamps are activated with the combination switch (lighting and turn signal switch). The combina-
tion switch (lighting and turn signal switch) signal to the BCM is monitored with the BCM combination switch
reading function. When the fog lamps are turned ON wit h the combination switch (lighting and turn signal
switch), the BCM sends a front fog lamp request signal via CAN communication lines to the IPDM E/R. The
IPDM E/R grounds the front fog lamp relay coil to activate the front fog lamps.
Component Parts LocationINFOID:0000000005146622
Component DescriptionINFOID:0000000005369881
FRONT FOG LAMP OPERATION
When the combination switch (lighting and turn signal switch) is in front fog lamp ON position and also in 1ST
or 2ND position or AUTO position (headlamp is ON), the BCM detects FR FOG ON and the HEAD LAMP1, 2
ON or the AUTO LIGHT ON. The BCM sends a front fog lamp request ON signal via the CAN communication
lines to the IPDM E/R. The IPDM E/R then turns ON t he front fog lamp relay sending power to the front fog
lamps.
AWLIA1719GB
1. BCM M18, M20 (view with instrument
panel removed) 2. IPDM E/R E122, E123, E124 3. Combination switch (lighting and turn
signal switch) M28
AWNIA0509ZZ
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TURN SIGNAL AND HAZARD WARNING LAMPSEXL-15
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TURN SIGNAL AND HA ZARD WARNING LAMPS
System DiagramINFOID:0000000005146624
System DescriptionINFOID:0000000005146625
TURN SIGNAL OPERATION
When the combination switch (lighting and turn signal switch) is in LH or RH position with the ignition switch in
ON position, the BCM detects the TURN RH or TURN LH ON request. The BCM outputs the flasher signal to
the respective turn signal lamp. The BCM also sends a turn indicator signal ON request via the CAN commu-
nication lines to the combination meter. The combination meter then activates the appropriate turn signal indi-
cator and audible buzzer.
HAZARD LAMP OPERATION
When the hazard switch is in ON position, the BCM detects the hazard switch signal ON. The BCM outputs the
flasher signal (right and left). The BCM sends a hazar d indicator signal ON request via the CAN communica-
tion lines to the combination meter. The combinati on meter then activates the hazard indicator and audible
buzzer.
REMOTE KEYLESS ENTRY OPERATION
The remote keyless entry receiver transmits a hazard request signal to the BCM, then BCM controls hazard
lamps.
Refer to SEC-10, "
System Description".
Component Parts LocationINFOID:0000000005146626
AWLIA1721GB
AWLIA1628ZZ
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EXL-16
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TURN SIGNAL AND HAZARD WARNING LAMPS
Component Description
INFOID:0000000005146627
1. Combination meter M23, M24 2. Combination switch (lighting and turn signal switch) M283. Hazard switch M55
4. BCM M18, M20 (view with instrument panel removed)
Part name Description
BCM Controls turn signal and hazard flasher operation.
Combination switch (lighting and turn signal switch) Lighting and turn signal switch requests are output to the BCM.
Hazard switch Hazard flasher request signal is output to the BCM.
Combination meter Outputs turn and hazard indicator as requested by the BCM.
Revision: April 20092010 QX56