Front lamp INFINITI FX35 2005 Service Manual

FRONT FOG LAMP LT-79
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Revision: 2005 July 2005 FX
FRONT FOG LAMPPFP:26150
Component Parts and Harness Connector LocationAKS007O5
System DescriptionAKS007CI
Control of the front fog lamps is dependent upon the position of the combination switch (lighting switch). The
lighting switch must be in the 2ND position or AUTO position (headlamp is ON) for front fog lamp opera-
tion.When the lighting switch is placed in the fog lamp position the BCM (body control module) receives input
signal requesting the front fog lamps to illuminate. When the headlamps are illuminated, this input signal is
communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communi-
cation lines. The CPU (central processing unit) located in the IPDM E/R controls the front fog lamp relay coil.
When activated, this relay directs power to the front fog lamps.
OUTLINE
Power is supplied at all times

through 15A fuse (No. 88, located in IPDM E/R)

to front fog lamp relay, located in IPDM E/R,

through 15A fuse (No. 78, located in IPDM E/R)

to CPU located in IPDM E/R, and

to ignition relay, located in IPDM E/R, from battery direct,

through 10A fuse (No. 71, located in IPDM E/R)

to CPU located in IPDM E/R.
Power is also supplied at all times

through 50A fusible link (letter M, located in fuse, fusible link and relay box)

to BCM terminal 55,

through 15A fuse [No. 22, located in fuse block (J/B)]

to BCM terminal 42.
When ignition switch is in ON or START position, power is supplied

through 15A fuse [No. 1, located in fuse block (J/B)]
PKIB3475E

LT-80
FRONT FOG LAMP
Revision: 2005 July 2005 FX

to BCM terminal 38.
When ignition switch is in ACC or ON position, power is supplied

through 10A fuse [No. 6, located in fuse block (J/B)]

to BCM terminal 11.
Ground is supplied

to BCM terminals 49 and 52

through grounds M35, M45 and M85,

to IPDM E/R terminals 38 and 60

through grounds E21, E50 and E51.
FRONT FOG LAMP OPERATION
The front fog lamp switch is built into combination switch. The lighting switch must be in the 2ND position or
AUTO position (headlamp is ON) and the front fog lamp switch must be ON for front fog lamp operation.
With the front fog lamp switch in the ON position, the CPU located in the IPDM E/R grounds the coil side of the
front fog lamp relay. The front fog lamp relay then directs power

through IPDM E/R terminal 37

to front fog lamp LH terminal 1,

through IPDM E/R terminal 36

to front fog lamp RH terminal 1.
Ground is supplied

to front fog lamp LH terminal 2

through grounds E21, E50 and E51,

to front fog lamp RH terminal 2

through grounds E21, E50 and E51.
With power and grounds supplied, front fog lamps illuminate.
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 2ND position (ON), the front fog lamp switch is ON, and
the ignition switch is turned from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the front fog lamps (and headlamps) remain illuminated for 5 minutes, then the front fog
lamps (and headlamps) are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionAKS007CJ
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS0080V
Refer to LAN-30, "CAN Communication Unit" .

FRONT FOG LAMP LT-81
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Revision: 2005 July 2005 FX
Wiring Diagram — F/FOG —AKS007CL
TKWM0819E

LT-82
FRONT FOG LAMP
Revision: 2005 July 2005 FX
TKWM0620E

FRONT FOG LAMP LT-83
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Terminals and Reference Values for BCMAKS007XP
Terminals and Reference Values for IPDM E/RAKS007CN
Terminal
No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
2 GY Combination switch input 5 ON Lighting, turn, wiper OFF
Wiper dial position 4
3 L/B Combination switch input 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
4 PU/W Combination switch input 3
5 Y/R Combination switch input 2
6 SB Combination switch input 1
11 LG/R Ignition switch (ACC) ACC — Battery voltage
32 GY/R Combination switch output 5 ON Lighting, turn, wiper OFF
Wiper dial position 4
33 G Combination switch output 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
34 W/B Combination switch output 3
35 W/G Combination switch output 2
36 W/R Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 L CAN − H—— —
40 R CAN − L—— —
42 L/R Battery power supply OFF — Battery voltage
49 B Ground ON — Approx. 0V
52 B Ground ON — Approx. 0V
55 G Battery power supply OFF — Battery voltage
PKIB3468E
PKIB3469E
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Termi- nal
No. Wire
color Signal
name Measuring condition
Reference value
Ignition
switch Operation or condition
36 W Front fog
lamp (RH) ONLighting switch must be in the 2ND position or AUTO position
(headlamp is ON) and front fog lamp switch must be ON. OFF Approx. 0V
ON Battery voltage
37 SB Front fog
lamp (LH) ONLighting switch must be in the 2ND position or AUTO position
(headlamp is ON) and front fog lamp switch must be ON. OFF Approx. 0V
ON Battery voltage
38 B Ground ON — Approx. 0V
48 L CAN − H— — —

LT-84
FRONT FOG LAMP
Revision: 2005 July 2005 FX
How to Proceed With Trouble DiagnosisAKS007CO
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 7 9 , "
System Description" .
3. Perform Preliminary Check. Refer to LT- 8 4 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does front fog lamp operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Preliminary CheckAKS007CP
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES
Check for blown fuses.
Refer to LT- 8 1 , "
Wiring Diagram — F/FOG —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
49 R CAN − L— — —
60 B Ground ON — Approx. 0V
Te r m i -
nal
No. Wire
color Signal
name Measuring condition
Reference value
Ignition
switch Operation or condition
Unit Power source Fuse and fusible link No.
BCM Battery
M
22
Ignition switch ON or START position 1 Ignition switch ACC or ON position 6
IPDM E/R Battery 88

FRONT FOG LAMP LT-85
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2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or conector.
CONSULT-II Functions (BCM)AKS007CQ
Refer to LT- 1 8 , "CONSULT-II Functions (BCM)" in HEADLAMP.
CONSULT-II Functions (IPDM E/R)AKS00CM5
Refer to LT- 2 0 , "CONSULT-II Functions (IPDM E/R)" in HEADLAMP.
Terminal Ignition switch position
(+) (-) OFF ACC ON
Connector Terminal
(Wire color)
M3 11 (LG/R)
Ground Approx. 0V
Battery
voltage Battery
voltage
38 (W/L) Approx. 0V Approx. 0V Battery
voltage
M4 42 (L/R)
Battery
voltage Battery
voltage Battery
voltage
55 (G) Battery
voltage Battery
voltage Battery
voltage
PKIB5197E
Terminal Continuity
Connector Terminal (Wire color) Ground Yes
M4 49 (B)
52 (B)
PKIB3545E

LT-86
FRONT FOG LAMP
Revision: 2005 July 2005 FX
Front Fog Lamp Does Not Illuminate (Both Sides)AKS007I9
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “HEAD LAMP” data monitor,
make sure “FR FOG SW” turns ON-OFF linked with operation of
lighting switch.
Without CONSULT-II
Refer to LT- 11 5 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check combination switch (lighting switch). Refer to LT-
11 5 , "Combination Switch Inspection" .
2. FRONT FOG LAMP ACTIVE TEST
With CONSULT-II
1. Select “IPDM E/R” on CONSULT-II, and select “ACTIVE TEST” on “SELECT DIAG MODE” screen.
2. Select “LAMPS” on “SELECT TEST ITEM” screen.
3. Touch “FOG” screen.
4. Make sure front fog lamp operation.
Without CONSULT-II
1. Start auto active test. Refer to PG-24, "
Auto Active Test" .
2. Make sure front fog lamp operation.
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 “FR FOG REQ” turns ON when lighting switch is in FOG position.
OK or NG
OK >> Replace IPDM E/R.
NG >> Replace BCM. Refer to BCS-16, "
Removal and Installa-
tion of BCM" .
When lighting switch is FOG
position : FR FOG SW ON
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Front fog lamp should operate.
Front fog lamp should operate.
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When lighting switch is FOG
position : FR FOG REQ ON
SKIA5898E

FRONT FOG LAMP LT-87
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4. CHECK FRONT FOG LAMP INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect front fog lamp RH and LH connector.
3. Select “IPDM E/R” on CONSULT-II, and select “ACTIVE TEST” on “SELECT DIAG MODE” screen.
4. Select “LAMPS” on “SELECT TEST ITEM” screen.
5. Touch “FOG” screen.
6. When front fog lamp is operating, check voltage between front fog lamp RH and LH harness connector and ground.
Without CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect front fog lamp RH and LH connector.
3. Start auto active test. Refer to PG-24, "
Auto Active Test" .
4. When front fog lamp is operating, check voltage between front fog lamp RH and LH harness connector and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK FRONT FOG LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E8 ter- minal 36 (W) and front fog lamp RH harness connector E102
terminal 1 (W).
4. Check continuity between IPDM E/R harness connector E8 ter- minal 37 (SB) and front fog lamp LH harness connector E45 ter-
minal 1 (SB).
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness or connector.
Terminal
Voltage
(+)
(-)
Connector Terminal (Wire color)
RH E102 1 (W) Ground Battery voltage
LH E45 1 (SB)
Terminal Voltage
(+)
(-)
Connector Terminal (Wire color)
RH E102 1 (W) Ground Battery voltage
LH E45 1 (SB)SKIA5899E
36 (W) – 1 (W) : Continuity should exist.
37 (SB) – 1(SB) : Continuity should exist.
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LT-88
FRONT FOG LAMP
Revision: 2005 July 2005 FX
6. CHECK FRONT FOG LAMP GROUND
1. Turn ignition switch OFF.
2. Check continuity between front fog lamp RH harness connector E102 terminal 2 (B) and ground.
3. Check continuity between front fog lamp LH harness connector E45 terminal 2 (B) and ground.
OK or NG
OK >> Check front fog lamp bulbs.
NG >> Repair harness or connector.
Front Fog Lamp Does Not Illuminate (One Side)AKS007IA
1. CHECK BULB
Check bulb of lamp which does not illuminate.
OK or NG
OK >> GO TO 2.
NG >> Replace front fog lamp bulb.
2. CHECK FRONT FOG LAMP CIRCUIT
1. Disconnect IPDM E/R connector and front fog lamp RH or LH connector.
2. Check continuity between IPDM E/R harness connector E8 ter- minal 36 (W) and front fog lamp RH harness connector E102
terminal 1 (W).
3. Check continuity between IPDM E/R harness connector E8 ter- minal 37 (SB) and front fog lamp LH harness connector E45 ter-
minal 1 (SB).
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK FRONT FOG LAMP GROUND
1. Check continuity between front fog lamp RH harness connector E102 terminal 2 (B) and ground.
2. Check continuity between front fog lamp LH harness connector E45 terminal 2 (B) and ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness or connector. 2 (B) – Ground : Continuity should exist.
2 (B) – Ground : Continuity should exist.
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36 (W) – 1 (W) : Continuity should exist.
37 (SB) – 1 (SB) : Continuity should exist.
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2 (B) – Ground : Continuity should exist.
2 (B) – Ground : Continuity should exist.
SKIA5901E