headlamp INFINITI QX56 2004 Factory Repair Manual

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-35
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System DescriptionEKS007AB
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
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

through 10A fuse [No. 19, located in the fuse block (J/B)]

to combination meter terminal 8, and

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70, and

through 10A fuse [No. 45, located in the IPDM E/R (intelligent power distribution module engine room)]

to daytime light relay terminals 2 and 5.
When the ignition switch is in ON or START position, power is supplied

through 10A fuse [No. 14, located in the fuse block (J/B)]

to combination meter terminal 24, and

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to combination meter terminal 17 and

to BCM terminal 67

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 (central processing unit) 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

through 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 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, "COMBINATION SWITCH READING FUNCTION" .
AUTO LIGHT OPERATION
For auto light operation, refer to LT-4 8, "System Description" in AUTO LIGHT SYSTEM.
CAN Communication System DescriptionEKS007AC
Refer to LAN-5, "CAN COMMUNICATION" .

LT-36
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
SchematicEKS007AD
WKWA3109E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-37
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Wiring Diagram — DTRL —EKS007AE
WKWA3110E

LT-38
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
WKWA3111E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-39
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WKWA1402E

LT-40
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: August 20072004 QX56
WKWA1403E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-41
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Terminals and Reference Values for BCMEKS007AF
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
2 SB Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
3 G/Y Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
4 Y Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
5 G/B Combination switch input 2
ONLighting, turn, wiper OFF
Wiper dial position 4
6 V Combination switch input 1
32 R/G Combination switch output 5 ONLighting, turn, wiper OFF
Wiper dial position 4
33 R/Y Combination switch output 4 ONLighting, turn, wiper OFF
Wiper dial position 4
34 L Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

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 description and function description. Refer to LT-35, "
System Description" .
3. Perform the Preliminary Check. Refer to LT-42, "
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 CheckEKS007AH
CHECK BCM CONFIGURATION
1. CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-13, "
READ CONFIGURATION PROCE-
DURE" .
OK or NG
OK >> Continue preliminary check. Refer to LT- 4 2 , "INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT" .
NG >> Change BCM configuration for "DTRL" to "WITH". Refer to BCS-16, "
WRITE CONFIGURATION
PROCEDURE" .
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES AND FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 3 7 , "
Wiring Diagram — DTRL —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible
link)OFF
—Battery voltage Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Unit Power source Fuse No.
BCMBattery f
Ignition switch ON or START position 59
Daytime light relay Battery 45

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-43
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2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between BCM and fuse
or fusible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> Inspection End.
NG >> Check ground circuit harness.
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.
BCM
(–)Ignition switch position
(+)
OFF ACC ON
ConnectorTerminal
(wire color)
M18 38 (W/L)
Ground0V 0VBattery
voltage
M20 70 (W/B)Battery
voltageBattery
voltageBattery
voltage
WKIA1436E
BCM
Continuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground Yes
LIIA0915E
Brake indicator in combination meter should illuminate
when parking brake is applied and turn OFF when
released.

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. Check voltage between parking brake switch harness connector
M11 terminal + (G) 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 harness connector
M24 terminal 23 (G) and parking brake switch harness connec-
tor M11 terminal + (G).
OK or NG
OK >> Replace combination meter. Refer to IP-13, "Combina-
tion Meter" .
NG >> Repair harness or connector.
CONSULT-II FunctionsEKS007AI
Refer to LT- 1 8 , "CONSULT-II Function (BCM)" in HEADLAMP (FOR USA).
Refer to LT- 2 1 , "
CONSULT-II Function (IPDM E/R)" in HEADLAMP (FOR USA).
Daytime Light Control Does Not Operate Properly (Normal Headlamps Operate
Properly)
EKS007AJ
1. CHECK DAYTIME LIGHT RELAY POWER SUPPLY CIRCUIT
1. Remove daytime light relay.
2. Check voltage between daytime light relay harness connector
E103 terminals 2 (G), 5 (G) and ground
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.+ (G) - Ground : Battery voltage should exist.
WKIA0481E
+ (G) - 23 (G) : Continuity should exist.
WKIA1445E
2 (G), 5 (G) - Ground : Battery voltage should exist.
WKIA1446E