2008 INFINITI FX35 power supply

INTERIOR ROOM LAMPLT-139
< SERVICE INFORMATION >
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Ignition keyhole illumination turns ON at time when dr iver door is opened (door switch ON) or removed keyfob
from key cylinder. Illumination turns OFF when driver door is closed (door switch OFF).
Step lamp turns ON at time when driver door or pa ssenger door is opened (door switch ON). Lamp turns OFF
when the driver, passenger doors are closed (all door switches OFF).
POWER SUPPLY AND GROUND
Power is supplied at all times (without Intelligent Key system)
 through 15A fuse [No. 22, located in fuse block (J/B)]
 to key switch terminal 2 and
 to BCM terminal 42,
 through 50A fusible link (letter M, located in fuse, fusible link and relay box)
 to BCM terminal 55,
 through 10A fuse [No. 19, located in fuse block (J/B)]
 to combination meter terminal 8.
Power is supplied at all times (with Intelligent Key system)
 through 10A fuse (No.38, located in fuse, fusible link and relay box)
 to key switch and ignition knob switch terminal 1,
 through 15A fuse [No.22, located in fuse block (J/B)]
 to BCM terminal 42 and
 to key switch and ignition knob switch terminal 3,
 through 50A fusible link (letter M, located in fuse, fusible link and relay box)
 to BCM terminal 55,
 through 10A fuse [No. 19, located in fuse block (J/B)]
 to combination meter terminal 8.
When key plate inserted to key switch, power is supplied (without Intelligent Key system)
 through key switch terminal 1
 to BCM terminal 37.
When inserted key plate to key switch, power is supplied (with Intelligent Key system)
 through key switch and ignition knob switch terminal 4
 to BCM terminal 37.
When moved ignition knob switch, power is supplied (with Intelligent Key system)
 through ignition knob switch terminal 2
 to intelligent key unit terminal 27.
With ignition switch in the ON or START position, power is supplied
 through 15A fuse [No. 1, located in fuse block (J/B)]
 to BCM terminal 38,
 through 10A fuse [No. 14, located in fuse block (J/B)]
 to combination meter terminal 7.
Ground is supplied
 to BCM terminals 49 and 52, and
 to combination meter terminal 5, 6 and 15
 through grounds terminals M35, M45 and M85.
When driver side door is opened, ground is supplied
 to BCM terminal 62
 through front door switch (driver side) terminal 1
 through case ground of front door switch (driver side).
When passenger side door is opened, ground is supplied
 to BCM terminal 12
 through front door switch (passenger side) terminal 1
 through case ground of front door switch (passenger side).
When rear door RH is opened, ground is supplied
 to BCM terminal 13, and
 to personal lamp RH terminal 1
 through rear door switch RH terminal 1
 through case ground of rear door switch RH.
When rear door LH is opened, ground is supplied
 to BCM terminal 63, and
 to personal lamp LH terminal 1
 through rear door switch LH terminal 1
 through case ground of rear door switch LH.
When driver side door is unlocked by door lock and unlock switch, BCM receives a ground signal
 through grounds terminals M35, M45 and M85
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INTERIOR ROOM LAMPLT-141
< SERVICE INFORMATION >
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When personal lamp RH or LH switch is ON, ground supplied
 to personal lamp RH or LH terminal 3
 through grounds M35, M45 and M85.
And power is supplied
 from BCM terminal 41
 to personal lamp LH or RH terminal 2.
When vanity mirror lamp (driver side or passenger side) is ON, ground is supplied
 to vanity mirror lamp (driver side or passenger side) terminal 2
 through grounds M35, M45 and M85.
And power is supplied
 from BCM terminal 41
 to vanity mirror lamp (driver side or passenger side) terminal 1.
When luggage room lamp (back door side) is ON, ground is supplied
 to luggage room lamp (back door side) terminal 3
 through grounds B15 and B45.
And power is supplied
 from BCM terminal 41
 to luggage room lamp (back door side) terminals 2.
ROOM LAMP TIMER OPERATION
Without Intelligent Key System
When the interior room lamp and map lamp switch is in DOOR position, and when all conditions below are
met, BCM performs timer control (maximum 30 seconds ) for interior room lamp and map lamp ON/OFF.
In addition, when spot turns ON or OFF there is gradual brightening or dimming over 1 second.
Power is supplied
 to 15A fuse [No. 22, located infuse block (J/B)]
 through key switch terminal 2.
Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.
Ground is supplied
 from BCM terminal 22
 to power window main switch (door lock and unlock switch) terminal 14.
At the time that driver door are opened, BCM detects that driver door is unlocked. It determines that interior
room lamp and map lamp timer operation conditions are met, and turns interior room lamp and map lamp ON
for 30 seconds.
Key is in ignition key cylinder (key switch ON),
Power is supplied
 through key switch terminal 1
 to BCM terminal 37.
When the key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated.
BCM detects that key has been removed, determines that interior room lamp and map lamp timer conditions
are met, and turns interior room lamp and map lamp ON for 30 seconds.
When driver door opens → closes, and key is not inserted in key s witch (key switch OFF), BCM terminal 62
changes between 0V (door open) → 12V (door closed). BCM determines that conditions for interior room lamp
and map lamp operation are met and turns interior room lamp ON for 30 seconds.
Timer control is canceled under the following conditions.
 Driver door is locked [when locked keyfob or power wi ndow main switch (door lock and unlock switch), door
key cylinder switch].
 Driver door is opened (driver door switch turns ON).
 Ignition switch ON.
With Intelligent Key System
When the interior room lamp and map lamp switch is in DOOR position, and when all conditions below are
met, BCM performs timer control (maximum 30 second) for interior room lamp and map lamp ON/OFF.
In addition, when spot turns ON or OFF there is gradual brightening or dimming over 1 second.
Power is supplied
 to 15A fuse [No. 22, located in fuse and fuse block (J/B)]
 through key switch and ignition knob switch terminal 3.
Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.
And not turned ignition knob switch, power will not be supplied to Intelligent Key unit.
Ground is supplied
 from BCM terminal 22
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LT-142
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
 to power window main switch (door lock and unlock switch) terminal 14.
At the time that driver door are opened, BCM detects that driver door is unlocked. It determines that interior
room lamp and map lamp timer operation conditions are met, and turns interior room lamp and map lamp ON
for 30 seconds.
Key is in ignition key cylinder (key swit ch ON), or turned ignition knob switch,
Power is supplied
 through key switch and ignition knob switch terminal 4
 to BCM terminal 37,
 through key switch and ignition knob switch terminal 2
 to intelligent key unit terminal 27.
When the key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated.
And turned ignition knob switch, power supply to Intel ligent Key unit is terminated. BCM detects that key has
been removed, determines that interior room lamp and map lamp timer conditions are met, and turns interior
room lamp and map lamp ON for 30 seconds.
When driver door opens → closes, and key is not inserted in key s witch (or not turned ignition knob switch),
BCM terminal 62 changes between 0V (door open) → 12V (door closed). BCM determines that conditions for
interior room lamp and map lamp operation are met and turns interior room lamp ON for 30 seconds.
Timer control is canceled under the following conditions.
 Driver door is locked [when locked keyfob, power window main switch (door lock and unlock switch) or door
key cylinder switch].
 Driver door is opened (driver door switch terns ON).
 Ignition switch ON.
INTERIOR LAMP BATTERY SAVER CONTROL
If lamps is left “ON”, it will not be turned out even when door is closed.
BCM turns off lamps automatically to save battery 30 minutes after ignition switch is turned off.
BCM controls lamps listed below:
 Ignition key hole illumination
 Front step lamp (driver side)
 Front step lamp (passenger side)
 Rear step lamp RH
 Rear step lamp LH
 Front door inside handle illumination (driver side)
 Front door inside handle illumination (passenger side)
 Rear door inside handle illumination RH
 Rear door inside handle illumination LH
 Personal lamp RH
 Personal lamp LH
 Interior room lamp (without DVD player)
 Map lamp
 Vanity mirror lamp
 Luggage room lamp
After lamps turn OFF by battery sa ver system, lamps illuminate again when
 signal from keyfob, or power window main switch (door lock and unlock switch) or key cylinder is locked or
unlocked,
 door is opened or closed,
 key is removed from ignition key cylinder or inserted in ignition key cylinder, or turned ignition knob switch.
Interior lamp battery saver control period can be changed by the function setting of CONSULT-III.
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INTERIOR ROOM LAMPLT-153
< SERVICE INFORMATION >
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Terminal and Reference Value for BCMINFOID:0000000001328410
Te r m i n a l No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
1PU Ignition keyhole illumi-
nation signal
OFFIgnition keyhole
illumination Illuminated Battery voltage
Not illuminated Approx. 0 V
12 P/B Front door switch (pas-
senger) signal OFF
Front door switch
(passenger side) ON (open) Approx. 0 V
OFF (closed)
Approx. 7.5 - 8.0 V
13 P/L Rear door switch RH
signal OFFRear door switch
RH ON (open) Approx. 0 V
OFF (closed) Battery voltage
22 OR Power window switch
serial link —Power window
main switch (door
lock and unlock
switch) and power
window sub-
switch (front pas-
senger side) (door
lock and unlock
switch) Lock or unlock switch
ON
NOTE:
Approx. 10 seconds
after door lock and un-
lock switch (driver side
and passenger side) is
turned “LOCK” or “UN-
LOCK”.
Approx. 9.0 - 9.5 V
OFF Battery voltage
37 B/W Key-in detection switch
signal OFFVehicle key is removed. Approx. 0 V
Vehicle key is inserted. Battery voltage
38 W/L Ignition power supply ON — Battery voltage
39 L CAN − H— — —
40 P CAN − L— — —
41 R/B Battery saver output
signal OFF
30 minutes after ignition switch is turned to
OFF Approx. 0 V
ON — Battery voltage
42 L/R Battery power supply OFF — Battery voltage
47 Y/R Step lamp signal OFF Any door is open (ON) Approx. 0 V
All doors are closed (OFF) Battery voltage
48 PU/W Interior room lamp,
map lamp, front door
inside handle and rear
door inside handle illu-
mination output signal OFF Any door switch
ON (open) Approx. 0 V
OFF (closed) Ba ttery voltage
49 B Ground ON — Approx. 0 V
52 B Ground ON — Approx. 0 V
55 G Battery power supply OFF — Battery voltage
58 L Back door switch sig-
nal OFFBack door closure
motor (door
switch) ON (open) Approx. 0 V
OFF (closed) Battery voltage
SKIB3419J
PKIC0930E
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LT-154
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
How to Proceed with Trouble Diagnosis
INFOID:0000000001328411
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-138, "
System Description".
3. Perform Preliminary Check. Refer to LT-154, "
Preliminary Check".
4. Check symptom and repair or r eplace the cause of malfunction.
5. Does interior room lamp operate normally ? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Preliminary CheckINFOID:0000000001328412
CHECK FOR POWER SUPPLY AND GROUND CIRCUIT
1.CHECK FUSES
Check for blown fuses.
Refer to LT- 1 4 5 , "Wiring Diagram - ROOM/L -".
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate caus e of malfunction before installing new fuse. Refer to PG-
3.
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
62 W Front door switch (driv-
er side) signal
OFFFront door switch
(driver side) ON (open) Approx. 0 V
OFF (closed)
Approx. 7.0 - 7.5 V
63 P Rear door switch LH
signal OFF
Rear door switch
LH ON (open) Approx. 0 V
OFF (closed) Ba
ttery voltage
Te r m i n a l
No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
PKIB4960J
Unit Power source Fuse and fusible link No.
BCM Battery M
22
Ignition switch ON or START position 1
(+) (-)Ignition switch position
BCM con- nector Te r m i n a l O F F O N
M3 38 GroundApprox. 0 V Battery voltage
M4 42 Battery voltage Battery voltage
55 Battery voltage Battery voltage
PKIA7520E
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LT-164
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
2. Check continuity between BCM harness connector and frontstep lamp harness connector.
3. Check continuity between BCM harness connector and rear step lamp harness connector.
OK or NG
OK >> Replace BCM if step lamp does not work after setting the connector again. Refer to BCS-13,
"Removal and Installation of BCM".
NG >> Repair harness or connector.
All Interior Room La mps Do Not OperateINFOID:0000000001328419
1.CHECK POWER SUPPLY CIRCUIT
1. All interior room lamps switch are OFF.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M4 terminal 41 and ground.
OK or NG
OK >> Repair harness or connector. In a case of making a short circuit, be sure to disconnect cable from the nega-
tive terminal repairing harness, and then reconnect.
NG >> Replace BCM. Refer to BCS-13, "
Removal and Installa-
tion of BCM".
Bulb ReplacementINFOID:0000000001328420
IGNITION KEY HOLE ILLUMINATION (without Intelligent Key)
1. Remove combination meter. Refer to DI-22, "Removal and
Installation of Combination Meter".
2. Remove screw and remove NATS antenna amp.
3. Pull out ring and turn bulb socket to left to release lock.
4. Installation is the reverse order of removal.
IGNITION KEY HOLE ILLUMINA TION (with Intelligent Key)
BCM
connector Te r m i n a l Front step lamp
connector Terminal Continuity
M4 41 Driver side D9 1
Ye s
Passenger
side D39 1
BCM
connector Terminal Rear step lamp connector Terminal Continuity
M4 41 LH D80 1
Ye s
RH D60 1
PKIB3523E
41 – Ground : Battery voltage.
SKIA5952E
Ignition key hole illu mination : 12 V - 0.8 W
SKIA5575E
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PG-1
ELECTRICAL
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SECTION PG
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CONTENTS
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SERVICE INFORMATION .. ..........................2
DTC INDEX ..................................................... .....2
U1000 .................................................................. ......2
POWER SUPPLY ROUTING CIRCUIT ...............3
Schematic ........................................................... ......3
Wiring Diagram - POWER - ......................................4
Fuse ........................................................................16
Fusible Link .............................................................16
Circuit Breaker ........................................................16
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
17
System Description ............................................. ....17
CAN Communication System Description ...............18
CAN Communication Unit .......................................18
Function of Detecting Ignition Relay Malfunction ....18
CONSULT-III Function (IPDM E/R) ..................... ....18
Auto Active Test ......................................................20
Schematic ...............................................................22
IPDM E/R Terminal Arrangement ...........................23
IPDM E/R Power/Ground Circuit Inspection ...........23
U1000 CAN COMM CIRCUIT .................................24
Removal and Installation of IPDM E/R ....................24
GROUND ...........................................................26
Ground Distribution .............................................. ....26
HARNESS .........................................................40
Harness Layout ................................................... ....40
Wiring Diagram Codes (Cell Codes) .......................60
ELECTRICAL UNITS LOCATION ....................64
Electrical Units Location ..........................................64
HARNESS CONNECTOR .................................68
Description ...............................................................68
ELECTRICAL UNITS ........................................71
Terminal Arrangement .............................................71
SMJ (SUPER MULTIPLE JUNCTION) .............73
Terminal Arrangement .............................................73
STANDARDIZED RELAY .................................75
Description ...............................................................75
FUSE BLOCK - JUNCTION BOX (J/B) ............77
Terminal Arrangement .............................................77
FUSE, FUSIBLE LINK AND RELAY BOX ........78
Terminal Arrangement .............................................78
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POWER SUPPLY ROUTING CIRCUITPG-3
< SERVICE INFORMATION >
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POWER SUPPLY ROUTING CIRCUIT
SchematicINFOID:0000000001328865
TKWM4905E
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