2005 INFINITI FX35 Ignition switch

LT-184
INTERIOR ROOM LAMP
Revision: 2005 July 2005 FX
4. CHECK PERSONAL LAMP CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M4 terminal 41 (R/B) and personal lamp harness connector.
OK or NG
OK >> Replace BCM if personal lamp does not work after setting the connector again. Refer to BCS-16,
"Removal and Installation of BCM" .
NG >> Repair harness or connector.
Ignition Key Hole Illumination Control Does Not OperateAKS007FH
1. CHECK EACH SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor to
make sure switches listed in display item list turn ON-OFF linked
with switch operation. Refer to LT- 1 7 8 , "
Display Item List" for
switches and their functions.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
2. ACTIVE TEST
1. Select “BCM” on CONSULT-II. Select “INT LAMP”.
2. Select “IGN ILLUM” active test to make sure lamp operates.
OK or NG
OK >> Replace BCM. Refer to BCS-16, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.
Terminal
Continuity
BCM Personal lamp
Connector Terminal
(Wire color) Connector
Terminal
(Wire color)
M4 41 (R/B) RH R55
2 (R) Yes
LH R54
PKIB3517E
PKIB3532E
Ignition key hole illumination should operate.
PKIA7642E

INTERIOR ROOM LAMP LT-185
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3. CHECK IGNITION KEY HOLE ILLUMINATION INPUT
1. Turn ignition switch OFF.
2. Check voltage between ignition key hole illumination harness connector M24 terminal 1 (R/B) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 6.
4. CHECK IGNITION KEY HOLE ILLUMINATION BULB
1. Disconnect ignition key hole illumination connector.
2. Check continuity between ignition key hole illumination terminals 1 and 2.
OK or NG
OK >> GO TO 5.
NG >> Replace ignition key hole illumination. Refer to LT- 1 5 5 ,
"Bulb Replacement, Removal and Installation" .
5. CHECK IGNITION KEY HOLE ILLUMINATION CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M3 terminal 1 (PU) and ignition key hole illumination harness connector M24
terminal 2 (PU).
OK or NG
OK >> Replace BCM if ignition key hole illumination does not work after setting the connector again. Refer to BCS-16,
"Removal and Installation of BCM" .
NG >> Repair harness or connector.
6. CHECK IGNITION KEY HOLE ILLUMINATION CIRCUIT
1. Disconnect BCM connector and ignition key hole illumination connector.
2. Check continuity between BCM harness connector M4 terminal 41 (R/B) and ignition key hole illumination harness connector
M24 terminal 1 (R/B).
OK or NG
OK >> Replace BCM if ignition key hole illumination does not work after setting the connector again. Refer to BCS-16,
"Removal and Installation of BCM" .
NG >> Repair harness or connector. 1 (R/B) – Ground : Battery voltage.
PKIA5260E
1 – 2 : Continuity should exist.
PKIA7789E
1 (PU) – 2 (PU) : Continuity should exist.
PKIA7643E
41 (R/B) – 1 (R/B) : Continuity should exist.
PKIB3520E

LT-186
INTERIOR ROOM LAMP
Revision: 2005 July 2005 FX
All Step Lamps Do Not OperateAKS007FI
1. CHECK EACH DOOR SWITCH
Select “BCM” on CONSULT-II. With “INT LAMP” data monitor to
make sure switches listed below turn ON-OFF linked with switch
operation.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
2. CHECK STEP LAMP INPUT
1. Turn ignition switch OFF.
2. Check voltage between front door driver side step lamp harness connector D9 terminal 1 (R) and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK STEP LAMP CIRCUIT
1. Disconnect BCM connector and front door driver side step lamp connector.
2. Check continuity between BCM harness connector M4 terminal 47 (Y/R) and front door driver side step lamp harness connector
D9 terminal 2 (SB).
OK or NG
OK >> Replace BCM if step lamp does not work after setting the connector again. Refer to BCS-16, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector.
Switch name CONSULT screen
Driver side door switch DOOR SW - DR
Passenger side door switch DOOR SW - AS
Rear RH side door switch DOOR SW - RR
Rear LH side door switch DOOR SW - RL
PKIB3532E
1 (R) – Ground : Battery voltage.
PKIA5264E
47 (Y/R) – 2 (SB) : Continuity should exist.
PKIB3522E

INTERIOR ROOM LAMP LT-187
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Revision: 2005 July 2005 FX
4. CHECK STEP LAMP CIRCUIT
1. Disconnect BCM connector and front door driver side step lamp connector.
2. Check continuity between BCM harness connector M4 terminal 41 (R/B) and front door driver side step lamp harness connector
D9 terminal 1 (R).
OK or NG
OK >> Replace BCM if step lamp does not work after setting the connector again. Refer to BCS-16, "
Removal and
Installation of BCM" .
NG >> Repair harness or connector.
All Interior Room Lamps Do Not OperateAKS007FJ
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 (R/B) 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-16, "
Removal and Installa-
tion of BCM" .
Bulb ReplacementAKS007FK
INTERIOR ROOM LAMP
1. Remove interior room lamp. Refer to LT- 1 8 8 , "Removal and
Installation" .
2. Insert a suitable tool and remove lens.
3. Remove bulb.
4. Installation is the reverse order of removal.
MAP LAMP
Refer to LT- 1 5 2 , "Bulb Replacement" in “MAPLAMP”.
PERSONAL LAMP
Refer to LT- 1 5 3 , "Bulb Replacement" in “PERSONAL LAMP”.
41 (R/B) – 1 (R) : Continuity should exist.
PKIB3523E
41 (R/B) – Ground : Battery voltage.
PKIB3524E
Interior room lamp :12V - 10W
PKIB3637E

ILLUMINATION LT-189
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Revision: 2005 July 2005 FX
ILLUMINATIONPFP:27545
System DescriptionAKS007EI
Control of illumination lamps operation is dependent upon position of lighting switch (combination switch).
When lighting switch is placed in the 1ST or 2ND position (or if auto light system is activated), BCM (body con-
trol module) receives input signal requesting illumination lamps to illuminate. This input signal is communi-
cated to IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines.
The CPU (central processing unit) located in the IPDM E/R controls tail lamp relay coil. This relay, when ener-
gized, directs power to illumination lamps, which then illuminate.
Power is supplied at all times

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

to tail lamp relay, located in IPDM E/R, and

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,

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

to CPU located in IPDM E/R,

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

to unified meter and A/C amp. terminal 21, and

to combination meter terminal 8.
With ignition switch in ON or START position, power is supplied

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

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

to BCM terminal 38,

through 10A fuse [No. 12, located in fuse block (J/B)]

to unified meter and A/C amp. terminal 22,

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

to combination meter terminal 7.
With ignition switch 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

to unified meter and A/C amp. terminals 29 and 30, and

to combination meter terminals 5, 6, and 15

through grounds M35, M45, and M85,

to IPDM E/R terminals 38 and 60

through grounds E21, E50, and E51.
ILLUMINATION OPERATION BY LIGHTING SWITCH
With lighting switch in the 1ST or 2ND position (or if auto light system is activated), BCM receives input signal
requesting illumination lamps to illuminate. This input signal is communicated to IPDM E/R across the CAN
communication lines. The CPU located in the IPDM E/R controls tail lamp relay coil, which, when energized,
directs power

through IPDM E/R terminal 22

to glove box lamp terminal 1

to A/T device (illumination) terminal 11

to snow mode switch (illumination) terminal 5

to VDC off switch (illumination) terminal 3

LT-190
ILLUMINATION
Revision: 2005 July 2005 FX

to clock (illumination) terminal 3

to hazard switch (illumination) terminal 3

to heated seat switch (driver side) (illumination) terminal 5

to heated seat switch (passenger side) (illumination) terminal 5

to LDW switch (illumination) terminal 5

to door mirror remote control switch (illumination) terminal 16

to A/C and AV switch (illumination) terminal 3

to NAVI control unit (illumination) terminal 25

to DVD player (illumination) terminal 12

to front cigarette lighter socket terminal 2

to rear power window switch LH (illumination) terminal 6 (without interruption detection function for rear
door window), and

to rear power window switch RH (illumination) terminal 6 (without interruption detection function for rear
door window).
Illumination control

through combination meter terminal 19

to A/T device (illumination) terminal 12

to snow mode switch (illumination) terminal 6

to VDC off switch (illumination) terminal 4

to clock (illumination) terminal 4

to hazard switch (illumination) terminal 4

to heated seat switch (driver side) (illumination) terminal 6

to heated seat switch (passenger side) (illumination) terminal 6

to door mirror remote control switch terminal 15

to LDW switch (illumination) terminal 4,

to A/C and AV switch (illumination) terminal 4

to NAVI control unit (illumination) terminal 30, and

to DVD player (illumination) terminal 10.
Ground is supplied at all times

to glove box lamp terminal 2, and

to front cigarette lighter socket terminal 3

through grounds M35, M45 and M85,

to rear power window switch LH (illumination) terminal 7 (without interruption detection function for rear
door window), and

to rear power window switch RH (illumination) terminal 7 (without interruption detection function for rear
door window)

through grounds B15 and B45.
With power and ground supplied, illumination lamps illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
When the lighting switch is in the 1ST or 2ND position (or if auto light system is activated), and ignition switch
is turned from ON or ACC to OFF, battery saver control function is activated.
Under this condition, illumination lamps remain illuminated for 5 minutes, then illumination lamps are turned
off.
When the lighting switch is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after
illumination lamps are turned off by battery saver control, and illumination lamps illuminate again.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionAKS007EJ
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

PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2005 July 2005 FX
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System DescriptionAKS005S9

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relay via IPDM E/R control cir-
cuit.

IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
pressure switch signal, and hood switch signal reception, etc.

It controls operation of each electrical part via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R-integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control
Using CAN communication line, it receives signal from BCM and controls the following lamps:

Headlamps (Hi, Lo)

Parking, license plate and tail lamps

Tail lamps

Front fog lamps
2. Wiper control Using CAN communication line, it receives signals from BCM and controls the front wipers.
3. Rear window defogger relay control Using CAN communication line, it receives signals from BCM and controls the rear window defogger
relay.
4. A/C compressor control Using CAN communication line, it receives signals from ECM and controls the A/C compressor.
5. Cooling fan control Using CAN communication line, it receives signals from ECM and controls cooling fan .
6. Horn control Using CAN communication line, it receives signals from BCM and controls horn relay.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L line, CAN H
line), it is possible to transmit maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control

When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication recovers normally, it also returns to normal control.

Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Fail-safe mode
Headlamp

With the ignition switch ON, the headlamp (low) is ON.

With the ignition switch OFF, the headlamp (low) is OFF.
Parking, license plate and tail lamps

With the ignition switch ON, the parking, license plate and tail lamps is ON.

With the ignition switch OFF, the parking, license plate and tail lamps is OFF.
Cooling fan

With the ignition switch ON, the cooling fan HI operates.

With the ignition switch OFF, the cooling fan stops.
Front wiper Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it
was in just before fail-safe control was initiated.
Rear window defogger Rear window defogger relay is OFF
A/C compressor A/C compressor is OFF
Front fog lamps Front fog lamp is OFF

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) PG-19
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IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.
1. CAN communication status

CAN communication is normally performed with other control units.

Individual unit control by IPDM E/R is normally performed.

When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status

Process to stop CAN communication is activated.

All systems controlled by IPDM E/R are stopped. When 3 seconds have elapsed after CAN communi-
cation with other control units is stopped, mode switches to sleep status.
3. Sleep status

IPDM E/R operates in low power mode.

CAN communication is stopped.

When a change in CAN communication line is detected, mode switches to CAN communication status.

When a change hood switch or ignition switch signal is detected, mode switches to CAN communica-
tion status.
CAN Communication System DescriptionAKS005SA
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. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected 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 UnitAKS00AOF
Refer to LAN-30, "CAN Communication Unit" .
Function of Detecting Ignition Relay MalfunctionAKS005SB

When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail
and parking lamps for 10 minutes to indicate ignition relay malfunction.

When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF. Ignition switch signal Ignition relay status Tail lamp relay
ON ON —
OFF OFF — ON OFF —
OFF ON ON (10 minutes)