light INFINITI QX56 2007 Factory Service Manual

LT-24
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Component Parts and Harness Connector LocationINFOID:0000000003533353
System DescriptionINFOID:0000000003533354
Daytime light system turns on daytime light lamps while driving. Daytime light lamps are not turned on if
engine is activated with parking brake applied. Release parking brake to turn on daytime light lamps. The
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-25
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lamps turn off when lighting switch is in the 2ND position or AUTO position (Headlamp is "ON") and when light-
ing switch is in the PASSING position. (Daytime light lamps are not turned off only by parking brake itself.)
A parking brake signal and engine run or stop signal are sent to BCM (body control module) by CAN commu-
nication line.
OUTLINE
Power is supplied at all times
• to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room),
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU (central processing unit) of the IPDM E/R,
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to combination meter terminal 8, and
• through 10A fuse (No. 45, located in the IPDM E/R)
• to daytime light relay terminals 2 and 5.
When the ignition switch is in ON or START position, power is supplied
• to ignition relay, located in the IPDM E/R,
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38, and
• through 10A fuse [No. 14, located in the fuse block (J/B)]
• to combination meter terminal 24.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminal 17
• through grounds M57, M61 and M79.
DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, the IPDM
E/R receives input requesting the daytime lights illuminate. This input is communicated across the CAN com-
munication lines. The CPU of the IPDM E/R controls the daytime light relay coil. When energized, this relay
directs power
• through daytime light relay terminal 3
• to front combination lamp LH terminal 2
• through front combination lamp LH terminal 6
• to IPDM E/R terminal 55
• through 10A fuse (No. 35, located in the IPDM E/R)
• through 10A fuse (No. 34, located in the IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 6.
Ground is supplied
• to front combination lamp RH terminal 2
• through grounds E9, E15 and E24.
With power and ground supplied, the daytime lights illuminate. The high beam headlamps are now wired in
series and illuminate at a reduced intensity.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "System Description" .
AUTO LIGHT OPERATION
Refer to LT-34, "System Description" .
CAN Communication System DescriptionINFOID:0000000003533355
Refer to LAN-4, "CAN Communication System" .

LT-26
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Schematic
INFOID:0000000003533356
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-27
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Wiring Diagram - DTRL -INFOID:0000000003533357
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LT-28
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-29
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LT-30
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Terminal and Reference Value for BCM
INFOID:0000000003533358
Refer to BCS-11, "Terminal and Reference Value for BCM" .
How to Proceed with Trouble DiagnosisINFOID:0000000003533359
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-24, "
System Description" .
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-31
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3. Perform the Preliminary Check. Refer to LT-31, "Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckINFOID:0000000003533360
CHECK BCM CONFIGURATION
1.CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-18, "
Configuration" .
OK or NG
OK >> Continue preliminary check. Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspec-
tion" .
NG >> Change BCM configuration for "DTRL" to "WITH". Refer to BCS-18, "
Configuration" .
INSPECT POWER SUPPLY AND GROUND CIRCUIT FOR BCM
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection".
INSPECTION PARKING BRAKE SWITCH CIRCUIT
1.CHECK BRAKE INDICATOR
1. Turn ignition switch ON.
2. Apply parking brake.
3. Release parking brake.
OK or NG
OK >> Inspection End.
NG >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect parking brake switch connector.
3. Turn ignition switch ON.
4. Check voltage between parking brake switch connector M11 ter-
minal 1 and ground.
OK or NG
OK >> Replace parking brake switch.
NG >> GO TO 3.
3.CHECK PARKING BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter connector M24 (A)
terminal 23 and parking brake switch connector M11 (B) terminal
1.
OK or NG
OK >> Replace combination meter. Refer to DI-21, "Removal
and Installation of Combination Meter" .
NG >> Repair harness or connector.Brake indicator in combination meter should illuminate
when parking brake is applied and turn OFF when re-
leased.
1 - Ground : Battery voltage should exist.
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1 - 23 : Continuity should exist.
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LT-32
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
CONSULT-II Function for BCM
INFOID:0000000003533361
Refer to BCS-16, "CONSULT-II Function (BCM)" .
CONSULT-II Function for IPDM E/RINFOID:0000000003533362
Refer to PG-18, "CONSULT-II Function (IPDM E/R)" .
Daytime Light Control Does Not Operate Properly (Normal Headlamps Operate Prop-
erly)
INFOID:0000000003533363
1.CHECK FUSE
Inspect 10A fuse (No. 45, located in the IPDM E/R).
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK DAYTIME LIGHT RELAY POWER SUPPLY CIRCUIT
1. Remove daytime light relay.
2. Check voltage between daytime light relay connector E103 ter-
minals 2, 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK DAYTIME LIGHT RELAY
1. Apply battery voltage to daytime light relay terminal 2 and
ground terminal 1.
2. Check continuity between terminals 3 and 5.
OK or NG
OK >> GO TO 4.
NG >> Replace daytime light relay.
4.CHECK DAYTIME LIGHT RELAY CIRCUIT
1. Disconnect IPDM E/R connector E122.
2. Check continuity between daytime light relay connector E103
(B) terminal 1 and front combination lamp LH connector E122
(A) terminal 44.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5.CHECK INPUT SIGNAL 2, 5 - Ground : Battery voltage should exist.
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3 - 5 : Continuity should exist.
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44 - 1 : Continuity should exist.
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-33
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1. Connect daytime light relay and IPDM E/R connector.
2. Apply parking brake and start engine. Headlamp switch OFF.
3. Select "IPDM E/R" on CONSULT-II. With data monitor, make
sure "DTRL REQ" turns OFF-ON linked with operation of park-
ing brake switch.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> GO TO 6.
6.CHECKING CAN COMMUNICATIONS
Select "BCM" on CONSULT-II and perform self-diagnosis for BCM.
Displayed self-diagnosis results
NO DTC>> Replace BCM. Refer to BCS-24, "BCM" .
CAN COMM CIRCUIT>> Check BCM CAN communication system.
Refer to BCS-18, "
CAN Communication Inspection
Using CONSULT-II (Self-Diagnosis)" .
Aiming AdjustmentINFOID:0000000003533364
Refer to LT-20, "Aiming Adjustment".
Bulb ReplacementINFOID:0000000003533365
Refer to LT-21, "Bulb Replacement".
Removal and InstallationINFOID:0000000003533366
Refer to LT-22, "Removal and Installation".
Disassembly and AssemblyINFOID:0000000003533367
Refer to LT-23, "Disassembly and Assembly". Parking brake ON : DTRL REQ OFF
Parking brake OFF : DTRL REQ ON
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