ignition INFINITI FX35 2004 Service Manual

LT-68
AUTO LIGHT SYSTEM
Revision: 2004 November 2004 FX35/FX45
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 Signals, Main Signals, Selection From 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 item to be tested, and check operation.
3. Touch “START”.
4. Touch “STOP” while testing to stop the operation.
Trouble Diagnosis Chart by SymptomAKS007F3
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
Position lights request TAIL & CLR REQ ON/OFF×× ×Signal status input from BCM
Headlamp low beam request HL LO REQ ON/OFF×× ×Signal status input from BCM
Headlamp high beam request HL HI REQ ON/OFF×× ×Signal status input from BCM
Font fog lights request FR FOG REQ ON/OFF×× ×Signal status input from BCM
Te s t i t e mCONSULT-II
screen displayDescription
Headlamp relay (HI, LO) output
LAMPSAllows headlamp relay (HI, LO) to operate by switching operation (OFF, HI ON,
LO ON) at your option (Head lamp high beam repeats ON–OFF every 1 second).
Front fog lamp relay output Allows fog lamp relay to operate by switching operation ON-OFF at your option
Tail lamp relay output TAIL LAMP Allows tail lamp relay to operate by switching operation ON-OFF at your option
Trouble phenomenon Malfunction system and reference

Parking lamps and headlamps will not illuminate when out-
side of the vehicle becomes dark. (Lighting switch 1st posi-
tion and 2nd position operate normally.)

Parking lamps and headlamp will not go out when outside
of the vehicle becomes light. (Lighting switch 1st position
and 2nd position operate normally.)

Headlamps go out when outside of the vehicle becomes
light, but parking lamps stay on.

Refer to LT- 6 4 , "WORK SUPPORT" .

Refer to LT- 6 9 , "Lighting Switch Inspection" .

Refer to LT- 6 9 , "Optical Sensor System Inspection" .
If above systems are normal, replace BCM.
Parking lamps illuminate when outside of the vehicle
becomes dark, but headlamps stay off. (Lighting switch 1st
position and 2nd position operate normally.)

Refer to LT- 6 4 , "WORK SUPPORT" .

Refer to LT- 6 9 , "Optical Sensor System Inspection" .
If above systems are normal, replace BCM.
Auto light adjustment system will not operate. (Lighting switch
AUTO, 1st position and 2nd position operate normally.)

Refer to LT- 6 9 , "Optical Sensor System Inspection" .
If above system is normal, replace BCM.

LT-70
AUTO LIGHT SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and optical sensor connector.
3. Check continuity (open circuit) between BCM harness connector
M3 terminal 17 (Y/G) and optical sensor harness connector M37
terminal 1 (Y/G).
4. Check continuity (short circuit) between BCM harness connector
M3 terminal 17 (Y/G) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Check continuity (open circuit) between BCM harness connector
M3 terminal 14 (P) and optical sensor harness connector M37
terminal 2 (P).
2. Check continuity (short circuit) between BCM harness connector
M36 terminal 14 (P) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Check continuity (open circuit) between BCM harness connector
M3 terminal 18 (B) and optical sensor harness connector M37
terminal 3 (B).
2. Check continuity (short circuit) between BCM harness connector
M37 terminal 18 (B) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.17 (Y/G) – 1 (Y/G) : Continuity should exist.
17 (Y/G) – Ground : Continuity should not exist.
SKIA5891E
14 (P) – 2 (P) : Continuity should exist.
14 (P) – Ground : Continuity should not exist.
SKIA5892E
18 (B) – 3 (B) : Continuity should exist.
18 (B) – Ground : Continuity should not exist.
SKIA5893E

AUTO LIGHT SYSTEM
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Revision: 2004 November 2004 FX35/FX45
5. CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M3 terminal 17
(Y/G) and ground.
OK or NG
OK >> Replace the optical sensor.
NG >> Replace BCM. Refer to BCS-15, "
Removal and Installa-
tion of BCM" .
Removal and Installation for Optical SensorAKS007F6
REMOVAL
1. Insert a screwdriver or similar tool and remove front defroster
grill (LH). Refer to IP-15, "
(V) Front Defroster Grille (LH/RH)" in
“IP” section.
2. Disconnect optical sensor connector.
3. Remove optical sensor.
INSTALLATION
Install in the reverse order of removal.17 (Y/G) – Ground : Approx. 5V should exist.
SKIA5894E
PKIA5275E

FRONT FOG LAMP
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Revision: 2004 November 2004 FX35/FX45
FRONT FOG LAMPPFP:26150
Component Parts and Harness Connector LocationAKS007O5
System DescriptionAKS007CI
Control of the fog lamps is dependent upon the position of the combination switch (lighting switch). The light-
ing switch must be in the 2ND position or AUTO position (LOW beam is ON) for front fog lamp operation.
When the lighting switch is placed in the fog lamp position the BCM (body control module) receives input sig-
nal requesting the fog lamps to illuminate. When the headlamps are illuminated, this input signal is communi-
cated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication
lines. The central processing unit of 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

to ignition relay [located in IPDM E/R (intelligent power distribution module engine room)]

through 15A fuse [No. 88, located in IPDM E/R (intelligent power distribution module engine room)]

to front fog lamp relay [located in IPDM E/R (intelligent power distribution module engine room)]

through 15A fuse [No. 78, located in IPDM E/R (intelligent power distribution module engine room)]

to CPU (central processing unit) [located in IPDM E/R (intelligent power distribution module engine room)]

through 10A fuse [No. 71, located in IPDM E/R (intelligent power distribution module engine room)]

to CPU (central processing unit) [located in IPDM E/R (intelligent power distribution module engine
room)].
Power is also supplied at all times

through 50A fusible link (letter M, located in the fuse and fusible link block)

to BCM (body control module) terminal 55

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

to BCM (body control module) terminal 42.
When the ignition switch is in ON or START position, power is supplied
PKIA5269E

LT-78
FRONT FOG LAMP
Revision: 2004 November 2004 FX35/FX45

to ignition relay [located in IPDM E/R (intelligent power distribution module engine room)]

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

to BCM (body control module) terminal 38.
When the ignition switch is in ACC or ON position, power is supplied

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

to BCM (body control module) terminal 11.
Ground is supplied

to BCM (body control module) terminals 49 and 52

through grounds M35, M45 and M85

to IPDM E/R (intelligent power distribution module engine room) terminals 38 and 60

through grounds E21, E50 and E51.
Fog Lamp Operation
The fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position or
AUTO position (LOW beam is ON) and the fog lamp switch must be ON for fog lamp operation.
With the fog lamp switch in the ON position, the CPU of the IPDM E/R grounds the coil side of the fog lamp
relay. The 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, and

to front fog lamp RH terminal 2

through grounds E21, E50 and E51.
With power and grounds supplied, the 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 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 fog lamps (and headlamps) remain illuminated for 5 minutes, then the 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-6, "CAN Communication Unit" .

FRONT FOG LAMP
LT-81
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Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Values for BCMAKS007XP
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
2 GY Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
3 L/B Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
4 PU/W Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
5 Y/R Combination switch input 2
ONLighting, turn, wiper OFF
Wiper dial position 4
6 SB Combination switch input 1
11 LG/R Ignition switch (ACC) ACC — Battery voltage
32 GY/R Combination switch output 5 ONLighting, turn, wiper OFF
Wiper dial position 4
33 G Combination switch output 4 ONLighting, turn, wiper OFF
Wiper dial position 4
34 W/B Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

LT-82
FRONT FOG LAMP
Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Values for IPDM E/RAKS007CN
How to Proceed With Trouble DiagnosisAKS007CO
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 7 7 , "
System Description" .
3. Perform the Preliminary Check. Refer to LT- 8 2 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the 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 fuses for blown-out.
35 W/G Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
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 Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
SKIA5292E
Terminal
No.Wire
colorSignal
nameMeasuring condition
Reference value
Ignition
switchOperation or condition
36 WFront fog
lamp (RH) ONLighting switch must be in the 2ND position or AUTO position
(LOW beam is ON) and the front fog lamp switch must be ON.OFF Approx. 0V
ON Battery voltage
37 SBFront fog
lamp (LH)ONLighting switch must be in the 2ND position or AUTO position
(LOW beam is ON) and the front fog lamp switch must be ON.OFF Approx. 0V
ON Battery voltage
38 B Ground ON — Approx. 0V
48 L CAN− H— — —
49 R CAN− L— — —
60 B Ground ON — Approx. 0V
Unit Power source Fuse and fusible link No.
BCMBatteryM
22
Ignition switch ON or START position 1
Ignition switch ACC or ON position 6

FRONT FOG LAMP
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Refer to LT-79, "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" .
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 >> Check harness for open or short between BCM and
fuse.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> INSPECTION END
NG >> Check ground circuit harness.
CONSULT-II FunctionsAKS007CQ
Refer to LT- 1 8 , "CONSULT-II Functions (BCM)" in HEAD LAMP.
Refer to LT- 2 1 , "
CONSULT-II Functions (IPDM E/R)" in HEAD LAMP.
IPDM E/R Battery71
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88 Unit Power source Fuse and fusible link No.
Terminals Ignition switch position
(+)
(-) OFF ACC ON
ConnectorTerminal
(Wire color)
M311 (LG/R)
Ground0VBattery
voltageBattery
voltage
38 (W/L) 0V 0VBattery
voltage
M442 (L/R)Battery
voltageBattery
voltageBattery
voltage
55 (G)Battery
voltageBattery
voltageBattery
voltage
PKIA5204E
Terminals
Continuity
Connector Terminal (Wire color)
M449 (B)
Ground Yes
52 (B)
PKIA5191E

FRONT FOG LAMP
LT-85
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Revision: 2004 November 2004 FX35/FX45
4. CHECK 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 “TAIL LAMP” on “SELECT TEST ITEM” screen.
5. Touch “FOG” screen.
6. When 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 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 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.
Terminals
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.
SKIA5900E

LT-86
FRONT FOG LAMP
Revision: 2004 November 2004 FX35/FX45
6. CHECK 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 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 >> GOTO 3.
NG >> Repair harness or connector.
3. CHECK 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.
SKIA5901E
36 (W) – 1 (W) : Continuity should exist.
37 (SB) – 1 (SB) : Continuity should exist.
SKIA5900E
2 (B) – Ground : Continuity should exist.
2 (B) – Ground : Continuity should exist.
SKIA5901E