2005 INFINITI QX4 turn signal

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-23
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Revision: October 20052005 QX56
4. CHECK HEADLAMP INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connectors.
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 "HI" on "ACTIVE TEST" screen.
7. When headlamp high 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 56 (L/W) and front combination lamp RH harness con-
nector E107 terminal 6 (L/W).
4. Check continuity between IPDM E/R harness connector E123
terminal 55 (G) and front combination lamp LH harness connec-
tor E11 terminal 6 (G).
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Repair harness or connector.
6. CHECK HEADLAMP GROUND
1. Turn ignition switch OFF.
2. Check continuity between front combination lamp RH harness
connector E107 terminal 2 (B) and ground.
3. Check continuity between front combination lamp LH harness
connector E11 terminal 2 (B) and ground.
OK or NG
OK >> Check front combination lamp connector for damage or
poor connection. Repair as necessary.
NG >> Repair harness or connector.
Terminals
Vo l ta g e (+)
(–)
ConnectorTe r m i n a l
(Wire color)
RH E107 6 (L/W)
Ground Battery voltage
LH E11 6 (G)
WKIA1852E
56 (L/W) - 6 (L/W) : Continuity should exist.
55 (G) - 6 (G) : Continuity should exist.
WKIA1853E
2 (B) - Ground : Continuity should exist.
2 (B) - Ground : Continuity should exist.
WKIA1854E

HEADLAMP (FOR USA)
LT-25
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Revision: October 20052005 QX56
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

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 -
LT-41
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Revision: October 20052005 QX56
Terminals and Reference Values for BCMEKS00B8I
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: October 20052005 QX56
How to Proceed With Trouble DiagnosisEKS00B8J
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-34, "
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 CheckEKS00B8K
CHECK BCM CONFIGURATION
1. CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-14, "
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 or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. 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 L CAN-H — — —
40 P CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible link) OFF — Battery voltage Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
Daytime light relay Battery 45