2004 INFINITI QX56 Factory Service Manual

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Page 2473 of 3371

INFINITI QX56 2004 Factory Service Manual LT-42
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
How to Proceed With Trouble DiagnosisEKS007AG
1. Confirm the symptom or customer complaint.
2. Understand operation

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INFINITI QX56 2004 Factory Service Manual HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
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2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM h

Page 2475 of 3371

INFINITI QX56 2004 Factory Service Manual LT-44
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
2. CHECK PARKING BRAKE SWITCH SIGNAL
1. Disconnect parking brake switch connector.
2. Turn ignition switch ON.
3. Ch

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INFINITI QX56 2004 Factory Service Manual HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
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2. CHECK DAYTIME LIGHT RELAY
1. Apply battery voltage to daytime light relay terminal 2 an

Page 2477 of 3371

INFINITI QX56 2004 Factory Service Manual LT-46
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
Aiming AdjustmentEKS007AK
Refer to LT- 3 1 , "Aiming Adjustment" .
Bulb ReplacementEKS007AL
Refer to LT- 3 3 , "D

Page 2478 of 3371

INFINITI QX56 2004 Factory Service Manual AUTO LIGHT SYSTEM
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AUTO LIGHT SYSTEMPFP:28491
Component Parts and Harness Connector LocationEKS007AO
WKIA3394E

Page 2479 of 3371

INFINITI QX56 2004 Factory Service Manual LT-48
AUTO LIGHT SYSTEM
Revision: August 20072004 QX56
System DescriptionEKS007AP
Automatically turns on/off the parking lamps and the headlamps in accordance with ambient light.
Timing for when the l

LT-48
AUTO LIGHT SYSTEM
Revision: August 20072004 QX56
System DescriptionEKS007AP
Automatically turns on/off the parking lamps and the headlamps in accordance with ambient light.
Timing for when the lamps turn on/off can be selected using four modes.
OUTLINE
The auto light control system uses an optical sensor that detects outside brightness.
When the lighting switch is in “AUTO” position, it automatically turns on/off the parking lamps and the head-
lamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the set-
ting, refer to LT-55, "
SETTING CHANGE FUNCTIONS" .
Optical sensor ground is supplied
to optical sensor terminal 3
through BCM (body control module) terminal 18.
When ignition switch is turned to “ON” position and when outside brightness is darker than prescribed level,
input is supplied
to BCM terminal 58
through optical sensor terminal 4.
The headlamps will then illuminate. For a description of headlamp operation, refer to LT- 6 , "
System Descrip-
tion" .
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the AUTO position, and the ignition switch is turned from
ON or ACC to OFF, and one of the front doors is opened, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
DELAY TIMER FUNCTION
When the ignition switch is ON and auto light switch is ON, the BCM turns on/off the headlamps. In delay timer
function, ignition is OFF, auto light sensor power source is OFF and the headlamps are not turned on/off by the
BCM. On condition that:
when the state of ignition switch ON or ACC is ON and output judgment by auto light function is headlamp
ON changes to ignition switch and ACC are OFF and any door switch is ON, output judgment by BCM
should be headlamp ON for 5 minutes by timer. After time out, output judgment by BCM should be head-
lamp OFF.
when the state of any door switch is turned to ON from OFF while 45 second or 5 minute timer is counting,
timer stops, and restarts counting for 5 minutes, then BCM judges output as headlamp ON. After time out,
BCM judges output as headlamp OFF.
when the state of front door switch (driver side), front door switch (passenger side), rear door switch LH,
rear door switch RH or back door latch (door ajar switch) is ON turns to all door switches are OFF while 45
second or 5 minute timer is counting, timer stops, and restarts counting for 45 seconds, then BCM judges
output as headlamp ON. After timer out, BCM judges output as headlamp OFF.
when the state is ignition switch ON or ACC is ON or auto light switch OFF while timer is counting, timer
stops counting and BCM turns on/off lamps according to headlamp function, front fog lamp function, auto
light function and headlamp battery save function.
Delay timer control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS007AQ
Refer to LAN-5, "CAN COMMUNICATION" .
Major Components and FunctionsEKS007AR
Components Functions
BCM
Turns on/off circuits of tail light and headlamp according to signals from light sensor, lighting switch
(AUTO), driver door switch, passenger door switch, rear door switch, and ignition switch (ON,
OFF).
Optical sensor
Converts ambient light (lux) to voltage, and sends it to BCM. (Detects lightness of 50 to 1,300 lux)

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INFINITI QX56 2004 Factory Service Manual AUTO LIGHT SYSTEM
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SchematicEKS007AS
WKWA1197E

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