light INFINITI QX4 2005 Factory Service Manual

HEADLAMP (FOR USA)
LT-21
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4. Select the desired part to be diagnosed on the "SELECT DIAG
MODE" screen.
DATA MONITOR
Operation Procedure
1. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen.
2. Touch "ALL SIGNALS", "MAIN SIGNALS" or "SELECTION FROM MENU" on the "SELECT MONITOR
ITEM" screen.
3. Touch "START".
4. Touch the required monitoring item on "SELECTION FROM MENU". In "ALL SIGNALS", all items are
monitored. In "MAIN SIGNALS", predetermined items are monitored.
5. Touch "RECORD" while monitoring to record the status of the item being monitored. To stop recording,
touch "STOP".
All Items, Main Items, Select Item Menu
NOTE:
Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the dis-
play may not be correct.
ACTIVE TEST
Operation Procedure
1. Touch "ACTIVE TEST" on "SELECT DIAG MODE" screen.
2. Touch "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch item to be tested, and check operation.
4. Touch "START".
5. Touch "STOP" while testing to stop the operation.
BCIA0031E
ALL SIGNALS All items will be monitored.
MAIN SIGNALS Monitor the predetermined item.
SELECTION FROM MENU Select any item for monitoring.
Item nameCONSULT-II
screen displayDisplay or
unitMonitor item selection
Description
ALL
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
Parking, license plate
and tail lamps requestTAIL&CLR REQ ON/OFF×× ×Signal status input from BCM
Headlamp low beam
requestHL LO REQ ON/OFF×× ×Signal status input from BCM
Headlamp high beam
requestHL HI REQ ON/OFF×× ×Signal status input from BCM
Daytime lights request DTRL REQ ON/OFF×–×Signal status input from BCM
Front fog lamps request FR FOG REQ ON/OFF×× ×Signal status input from BCM

LT-22
HEADLAMP (FOR USA)
Revision: October 20052005 QX56
Headlamp HI Does Not Illuminate (Both Sides)EKS00B83
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "HI BEAM SW" turns ON-OFF linked with operation of
lighting switch.
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT-100, "
Combination
Switch Inspection" .
2. HEADLAMP ACTIVE TEST
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST"
on "SELECT DIAG MODE" screen.
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "HI" on "ACTIVE TEST" screen.
4. Make sure headlamp high beam operates.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK IPDM E/R
1. Select "IPDM E/R" on CONSULT-II, and select "DATA MONI-
TOR" on "SELECT DIAG MODE" screen.
2. Make sure "HL LO REQ" and "HL HI REQ" turns ON when light-
ing switch is in HIGH position.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
Test item CONSULT-II screen display Description
Headlamp relay (HI, LO) out-
put
EXTERNAL LAMPSAllows headlamp relay (HI, LO) to operate by switching operation
(OFF, HI, LO) at your option (Headlamp high beam repeats ON-OFF
every 1 second).
Front fog lamp relay (FOG)
outputAllows fog lamp relay (FOG) to operate by switching operation ON-
OFF at your option.
Tail lamp relay outputAllows tail lamp relay to operate by switching operation ON-OFF at
your option.
When lighting switch is in
HIGH position: HI BEAM SW ON
SKIA4193E
Headlamp high beam should operate.
WKIA1438E
When lighting switch is in
HIGH position: HL LO REQ ON
: HL HI REQ ON
SKIA5775E

HEADLAMP (FOR USA)
LT-25
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4. INSPECTION BETWEEN IPDM E/R AND HEADLAMPS
1. Disconnect IPDM E/R connector and inoperative front combination lamp connector.
2. Check continuity between harness connector terminal of IPDM
E/R and harness connector terminal of inoperative front combi-
nation lamp.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Check for short and open circuits in harness between IPDM E/R and front combination lamps.
Repair as necessary.
High Beam Indicator Lamp Does Not IlluminateEKS00B85
1. BULB INSPECTION
Inspect CAN communication system. Refer to LAN-5, "
CAN COMMUNICATION" .
OK or NG
OK >> Replace combination meter. Refer to IP-13, "Combination Meter" .
NG >> Repair as necessary.
Headlamp LO Does Not Illuminate (Both Sides)EKS00B86
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "HEAD LAMP SW 1" and "HEAD LAMP SW 2" turns ON-
OFF linked with operation of lighting switch.
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT-100, "
Combination
Switch Inspection" .
2. HEADLAMP ACTIVE TEST
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST"
on "SELECT DIAG MODE" screen.
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "LO" on "ACTIVE TEST" screen.
4. Make sure headlamp low beam operates.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
Te r m i n a l s
Continuity IPDM E/R Front combination lamp
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E12356 (L/W) RH E107 6 (L/W)
Ye s
55 (G) LH E11 6 (G)
WKIA1853E
When lighting switch is in
2ND position: HEAD LAMP SW 1 ON
: HEAD LAMP SW 2 ON
WKIA4262E
Headlamp low beam should operate.
WKIA1438E

LT-26
HEADLAMP (FOR USA)
Revision: October 20052005 QX56
3. CHECK IPDM E/R
1. Select "IPDM E/R" on CONSULT-II, and select "DATA MONI-
TOR" on "SELECT DIAG MODE" screen.
2. Make sure "HL LO REQ" turns ON when lighting switch is in
2ND position.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
4. CHECK HEADLAMP INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connector.
3. Turn ignition switch ON.
4. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
5. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
6. Touch "LO" on "ACTIVE TEST" screen.
7. When headlamp low beam is operating, check voltage between
front combination lamp RH and LH harness connector and
ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E123
terminal 54 (R/Y) and front combination lamp RH harness con-
nector E107 terminal 5 (R/Y).
4. Check continuity between IPDM E/R harness connector E123
terminal 52 (L) and front combination lamp LH harness connec-
tor E11 terminal 5 (L).
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Repair harness or connector.When lighting switch is in
2ND position: HL LO REQ ON
SKIA5780E
Te r m i n a l s
Vo ltag e (+)
(–)
ConnectorTe r m i n a l
(Wire color)
RH E107 5 (R/Y)
Ground Battery voltage
LH E11 5 (L)
WKIA1855E
54 (R/Y) - 5 (R/Y) : Continuity should exist.
52 (L) - 5 (L) : Continuity should exist.
WKIA1856E

LT-28
HEADLAMP (FOR USA)
Revision: October 20052005 QX56
3. CHECK HEADLAMP GROUND
1. Turn the low beam headlamps OFF.
2. Check continuity between inoperative front combination lamp
connector terminal and ground.
OK or NG
OK >> Check front combination lamp and IPDM E/R connector.
Repair as necessary.
NG >> Repair open circuit in harness between inoperative front combination lamp and ground.
4. INSPECTION BETWEEN IPDM E/R AND HEADLAMPS
1. Disconnect IPDM E/R connector.
2. Check continuity between harness connector terminals of IPDM
E/R and harness connector terminals of inoperative front combi-
nation lamp.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Check for short circuits and open circuits in harness between IPDM E/R and front combination
lamp. Repair as necessary.
Headlamps Do Not Turn OFFEKS00B88
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "HEAD LAMP SW 1" and "HEAD LAMP SW 2" turns ON-
OFF linked with operation of lighting switch.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> GO TO 2.
2. CHECK LIGHTING SWITCH
Check lighting switch. Refer to LT-100, "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Replace lighting switch. Refer to LT- 1 0 2 , "
Removal and Installation" .
Te r m i n a l s
Continuity
ConnectorTe r m i n a l
(Wire color)
RH E107
1 (B) Ground Yes
LH E11
WKIA1857E
Terminals
Continuity IPDM E/R Front combination lamp
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wire color)
E12354 (R/Y) RH E107 5 (R/Y)
Ye s
52 (L) LH E11 5 (L)
WKIA1856E
When lighting switch is in
OFF position: HEAD LAMP SW 1 OFF
: HEAD LAMP SW 2 OFF
SKIA5200E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-33
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -PFP:26010
Component Parts and Harness Connector LocationEKS00B8D
WKIA3551E

LT-34
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: October 20052005 QX56
System DescriptionEKS00B8E
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

to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room), and

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

to BCM terminal 70, and

through 20A fuse (No. 53, located in the IPDM E/R)

to CPU (central processing unit) of the IPDM E/R, and

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, and

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, "COMBINATION SWITCH READING FUNCTION" .

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
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AUTO LIGHT OPERATION
For auto light operation, refer to LT-4 8, "System Description" in AUTO LIGHT SYSTEM.
CAN Communication System DescriptionEKS00B8F
Refer to LAN-5, "CAN COMMUNICATION" .

LT-36
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: October 20052005 QX56
SchematicEKS00B8G
WKWA2483E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-37
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Wiring Diagram — DTRL —EKS00B8H
WKWA2398E