bcm INFINITI FX35 2007 Service Manual

LT-78
FRONT FOG LAMP
Revision: 2006 July 2007 FX35/FX45
FRONT FOG LAMPPFP:26150
Component Parts and Harness Connector LocationNKS002WW
System DescriptionNKS002WX
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 front fog lamp on 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) through the
CAN communication 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

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

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,

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

to CPU located in IPDM E/R.

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

to ignition relay (located IPDM E/R)

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

FRONT FOG LAMP LT-79
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Revision: 2006 July 2007 FX35/FX45

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 36

to front fog lamp RH terminal 1,

through IPDM E/R terminal 37

to front fog lamp LH terminal 1.
Ground is supplied

to front fog lamp RH and LH terminals 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 DescriptionNKS002WY
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 UnitNKS002WZ
Refer to LAN-49, "CAN System Specification Chart" .

LT-82
FRONT FOG LAMP
Revision: 2006 July 2007 FX35/FX45
Terminals and Reference Values for BCMNKS002X1
CAUTION:

Check combination switch system terminal waveform under the loaded condition with lighting
switch, turn signal switch and wiper switch OFF not to be fluctuated by overloaded.

Turn wiper intermittent dial position to 4 except when checking waveform or voltage of wiper inter-
mittent dial position. Wiper intermittent dial position can be confirmed on CONSULT-II. Refer to LT-
11 7 , "DATA MONITOR" .
Terminal
No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
3L/B Combination
switch input 4 ON Lighting, turn, wiper
switch
(Wiper intermittent
dial position 4) OFF Approx. 0 V
Front fog lamp switch
(Operates only front fog
lamp switch)
Approx. 0.8 V
11 L G Ignition switch
(ACC) ACC — Battery voltage
32 GY/R Combination
switch output 5 ON Lighting, turn, wiper
switch
(Wiper intermittent
dial position 4) OFF
Approx. 7.2 V
Front fog lamp switch
(Operates only front fog
lamp switch)
Approx. 1.0 V
38 W/L Ignition switch
(ON) ON — Battery voltage
39 L CAN − H— — —
40 P CAN − L— — —
42 L/R Battery power
supply OFF — Battery voltage
49 B Ground ON — Approx. 0 V
52 B Ground ON — Approx. 0 V
55 G Battery power
supply OFF — Battery voltage
PKIB4955J
PKIB4960J
PKIB4956J

FRONT FOG LAMP LT-83
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Revision: 2006 July 2007 FX35/FX45
Terminals and Reference Values for IPDM E/RNKS002X2
How to Proceed With Trouble DiagnosisNKS002X3
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 7 8 , "
System Description" .
3. Perform Preliminary Check. Refer to LT- 8 3 , "
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 CheckNKS002X4
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES
Check for blown fuses.
Refer to LT- 8 0 , "
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" .
Termi-
nal
No. Wire
color Signal
name Measuring condition
Reference value
Ignition
switch Operation or condition
36 W Front fog
lamp (RH) ON
Lighting switch must be in the 2ND position or AUTO position
(headlamp is ON) and front fog lamp switch must be ON. OFF Approx. 0 V
ON Battery voltage
37 SB Front fog
lamp (LH) ON
Lighting switch must be in the 2ND position or AUTO position
(headlamp is ON) and front fog lamp switch must be ON. OFF Approx. 0 V
ON Battery voltage
38 B Ground ON — Approx. 0 V
48 L CAN − H— — —
49 R CAN − L— — —
60 B Ground ON — Approx. 0 V
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

LT-84
FRONT FOG LAMP
Revision: 2006 July 2007 FX35/FX45
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 connector.
CONSULT-II Functions (BCM)NKS002X5
Refer to LT- 1 8 , "CONSULT-II Functions (BCM)" .
CONSULT-II Functions (IPDM E/R)NKS002X6
Refer to LT- 2 0 , "CONSULT-II Functions (IPDM E/R)" .
(+)
(-) Ignition switch position
BCM con- nector Terminal OFF ACC ON
M3 11
Ground Approx. 0 V
Battery
voltage Battery
voltage
38 Approx. 0 V Approx. 0 V Battery
voltage
M4 42
Battery
voltage Battery
voltage Battery
voltage
55 Battery
voltage Battery
voltage Battery
voltage
PKIA5204E
BCM connector Terminal
Ground Continuity
M4 49
Ye s
52
SKIA5294E

FRONT FOG LAMP LT-85
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Revision: 2006 July 2007 FX35/FX45
Front Fog Lamps Do Not Illuminate (Both Sides)NKS002X7
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 8 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check combination switch (lighting switch). Refer to LT-
11 8 , "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-21, "
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-14, "
Removal and Installa-
tion of BCM" .
When lighting switch is
front fog lamp ON position : FR FOG SW ON
PKIA7598E
Front fog lamp should operate.
Front fog lamp should operate.
SKIA5774E
When lighting switch is
front fog lamp ON position : FR FOG REQ ON
SKIA5898E

LT-90
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: 2006 July 2007 FX35/FX45
TURN SIGNAL AND HAZARD WARNING LAMPSPFP:26120
Component Parts and Harness Connector LocationNKS002XC
System DescriptionNKS002XD
OUTLINE
Power is supplied at all times

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

to BCM terminal 55,

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

to BCM terminal 42,

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

to combination meter terminal 8.

through 10A fuse [No. 20, located in fuse block (J/B)]

to rear combination lamp control unit terminal 1.
When ignition switch is in ON or START position, power is supplied

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

to BCM (body control module) terminal 38,

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

to combination meter terminal 7.
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 rear combination lamp control unit terminal 7

through grounds E21, E50 and E51,

to BCM terminals 49 and 52, and
PKIC9692E

TURN SIGNAL AND HAZARD WARNING LAMPS LT-91
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to combination meter terminals 5, 6 and 15

through grounds M35, M45 and M85.
TURN SIGNAL OPERATION
LH Turn Signal Lamp
When the turn signal switch is moved to the left position, BCM output turn signal from BCM terminal 45, inter-
preting it as turn signal is ON.
Connected from BCM terminal 45 to front combination lamp LH terminal 4.
Turn signal lamp turns ON

through front combination lamp LH terminal 8

to grounds E21, E50 and E51.
Connected from BCM terminal 45 to rear combination lamp control unit terminal 4.
Rear turn signal (LED) turns ON

through rear combination lamp control unit terminal 11

to rear combination lamp LH terminal 3,

through rear combination lamp LH terminal 4

to rear combination lamp control unit terminal 10.
BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal
indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combi-
nation meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN
communication lines for speeding up turn signal blinking.
RH Turn Signal Lamp
When the turn signal switch is moved to right position, BCM output turn signal from BCM terminal 46, interpret-
ing it as turn signal is ON.
Connected from BCM terminal 46 to front combination lamp RH terminal 4.
Turn signal lamp turns ON

through front combination lamp RH terminal 8

to grounds E21, E50 and E51.
Connected form BCM terminal 46 to rear combination lamp control unit terminal 5.
Rear turn signal (LED) turns ON

through rear combination lamp control unit terminal 9

to rear combination lamp RH terminal 3,

through rear combination lamp RH terminal 4

to rear combination lamp control unit terminal 8.
BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal
indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combi-
nation meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN
communication lines for speeding up turn signal blinking.
HAZARD LAMP OPERATION
When the hazard switch is depressed, BCM output turn signal from BCM terminals 45 and 46, interpreting it as
turn signal is ON.
Connected from BCM terminal 45 and 46 to front combination lamp RH and LH terminals 4.
Turn signal lamp turns ON

through front combination lamp RH and LH terminals 8

to grounds E21, E50 and E51.
Connected form BCM terminals 45 and 46 to rear combination lamp control unit terminals 4 and 5.
Rear turn signal (LED) turns ON

through rear combination lamp control unit terminal 11

to rear combination lamp LH terminal 3,

through rear combination lamp LH terminal 4

to rear combination lamp control unit terminal 10,

LT-92
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: 2006 July 2007 FX35/FX45

through rear combination lamp control unit terminal 9

to rear combination lamp RH terminal 3,

through rear combination lamp RH terminal 4

to rear combination lamp control unit terminal 8.
And hazard switch is depressed, ground is supplied

to hazard switch terminal 2

through BCM terminal 29,

to grounds M35, M45 and M85

through hazard switch terminal 1.
BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal
indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combi-
nation meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN
communication lines for speeding up turn signal blinking.
REMOTE CONTROL ENTRY SYSTEM OPERATION
When the remote control entry system is triggered by input from key fob, BCM output turn signal from BCM
terminals 45 and 46, interpreting it as turn signal is ON.
Connected from BCM terminals 45 and 46 to front combination lamp RH and LH terminals 4.
Turn signal lamp turns ON

through front combination lamp RH and LH terminals 8

to grounds E21, E50 and E51.
Connected form BCM terminals 45 and 46 to rear combination lamp control unit terminals 4 and 5.
Rear turn signal (LED) turns ON

through rear combination lamp control unit terminal 11

to rear combination lamp LH terminal 3,

through rear combination lamp LH terminal 4

to rear combination lamp control unit terminal 10,

through rear combination lamp control unit terminal 9

to rear combination lamp RH terminal 3,

through rear combination lamp RH terminal 4

to rear combination lamp control unit terminal 8.
BCM sends signal to the unified meter and A/C amp. through the CAN communication, and turns ON turn sig-
nal indicator lamp with combination meter.
With power and input supplied, BCM controls the flashing of hazard warning lamps when key fob is used to
activate remote control entry system.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
CAN Communication System DescriptionNKS002XE
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 UnitNKS002XF
Refer to LAN-49, "CAN System Specification Chart" .

TURN SIGNAL AND HAZARD WARNING LAMPS LT-97
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Revision: 2006 July 2007 FX35/FX45
Terminals and Reference Values for BCMNKS002XI
CAUTION:

Check combination switch system terminal waveform under the loaded condition with lighting
switch, turn signal switch and wiper switch OFF not to be fluctuated by overloaded.

Turn wiper intermittent dial position to 4 except when checking waveform or voltage of wiper inter-
mittent dial position. Wiper intermittent dial position can be confirmed on CONSULT-II. Refer to LT-
11 7, "DATA MONITOR" .
Terminal
No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
2GY Combination
switch input 5 ON Lighting, turn,
wiper switch
(Wiper intermit-
tent dial position 4) OFF Approx. 0 V
Turn signal switch to right Approx. 1.0 V
3L/B Combination
switch input 4 ON Lighting, turn,
wiper switch
(Wiper intermit-
tent dial position 4) OFF Approx. 0 V
Turn signal switch to left Approx. 1.0 V
11 L G Ignition switch
(ACC) ACC — Battery voltage
29 G/Y Hazard switch
signal OFF Hazard switch ON Approx. 0 V
OFF Battery voltage
36 W/R Combination
switch output 1 ON Lighting, turn,
wiper switch
(Wiper intermit-
tent dial position 4) OFF
Approx. 7.2 V
Any of the conditions
below

Turn signal switch to
right

Turn signal switch to left
Approx. 1.2 V
38 W/L Ignition switch
(ON) ON — Battery voltage
39 L CAN − H— — —
40 P CAN − L— — —
PKIB4959J
PKIB4959J
PKIB4960J
PKIB4958J