fuse box INFINITI FX35 2004 Owner's Manual

PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2004 November 2004 FX35/FX45
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 room. It controls integrated relay via IPDM E/R control circuit.

IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
pressure switch signal, 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 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 relay.
5. Cooling fan control
Using CAN communication line, it receives signals from ECM and controls cooling fan relay.
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.
Tail and parking lamps

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

With the ignition switch OFF, the tail and parking 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 wiperUntil 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 OFF
A/C compressor A/C compressor OFF
Front fog lamps Front fog lamp relay OFF

FUSE BLOCK - JUNCTION BOX (J/B)
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Revision: 2004 November 2004 FX35/FX45
FUSE BLOCK - JUNCTION BOX (J/B)PFP:24350
Terminal ArrangementAKS007W8
CKIM0222E

PG-84
FUSE, FUSIBLE LINK AND RELAY BOX
Revision: 2004 November 2004 FX35/FX45
FUSE, FUSIBLE LINK AND RELAY BOXPFP:24382
Terminal ArrangementAKS007W9
CKIM0223E

SUNROOF
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Revision: 2004 November 2004 FX35/FX45
System DescriptionAIS003AZ
Power supplied at all time

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

to BCM terminal 55.

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

to BCM terminal 42.

through BCM terminal 54

to sunroof motor assembly terminal 7.
When ignition switch ON or START position,
Power is supplied

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

to BCM terminal 38.

through BCM terminal 53

to sunroof motor assembly terminal 9.
Ground is supplied

to BCM terminal 49 and 52

through body grounds M35, M45, M85 and R6.
TILT UP / SLIDE CLOSE OPERATION
When tilt up / slide close switch is pressed,
Ground is supplied

to sunroof motor assembly terminal 1

through sunroof switch terminal 3

through sunroof switch terminal 2

through body grounds M35, M45, M85 and R6.
Then, the sunroof tilt up / slide close.
TILT DOWN / SLIDE OPEN OPERATION
When tilt down / slide open switch is pressed,
Ground is supplied

to sunroof motor assembly terminal 5

through sunroof switch terminal 1

through sunroof switch terminal 2

through body grounds M35, M45, M85 and R6.
Then, the sunroof tilt down / slide open.
AUTO OPERATION
The power sunroof AUTO feature makes it possible to slide open and slide close or tilt up and tilt down the
sunroof without holding the sunroof switch in the down or up / tilt up or tilt down position.
RETAINED POWER OPERATION
When the ignition switch is turned to OFF position from ON position, power is supplied for 45 seconds.

through BCM terminal 53.

to sunroof motor assembly terminal 9.
When power is supplied, the sunroof can be operated.
The retained power operation is canceled when the driver or passenger side door is opened.
RAP signal period can be changed by CONSULT-II. Refer to RF-16, "
CONSULT-II Inspection Procedure" .

RF-18
SUNROOF
Revision: 2004 November 2004 FX35/FX45
Trouble Diagnosis Chart by SymptomAIS003D0
Power Supply and Ground Circuit Check of BCMAIS003D1
1. CHECK FUSE

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

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

Check 50A fusible link (letter M located in the fuse and fusible link box).
NOTE:
Refer to RF-10, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown out, 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 ON.
2. Check voltage between BCM connector M3, M4 terminal 38, 42, 55 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check BCM power supply circuit for open or short.
Symptom Diagnostic procedure and repair order Refer to page
Sunroof does not operate.1. Power supply and ground circuit check of BCMRF-18
2. Sunroof motor assembly power supply and ground
circuit checkRF-19
3. Sunroof switch system checkRF-20
4. Replace sunroof motor assembly.RF-29
Motor does not stop at the sunroof fully -open or fully-
closed position.1. Initialization procedure check.RF-12
2. Replace sunroof motor assembly.RF-29
Retained power operation does not operate properly.1. Check the retained power operation mode setting.RF-172. Door switch check.RF-22
3. Replace sunroof motor assembly.RF-29
Sunroof does not operate the interruption detection
function.1. Replace sunroof motor assembly.RF-29
38 (W/L) – Ground : Battery voltage
42 (L/R) – Ground : Battery voltage
55 (G) – Ground : Battery voltage
PIIA6160E

SC-10
STARTING SYSTEM
Revision: 2004 November 2004 FX35/FX45
STARTING SYSTEMPFP:23300
System Description AKS0079C
Power is supplied at all times:

through 40A fusible link (letter F, located in the fuse and fusible link box)

to ignition switch terminal 1

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

to CPU of IPDM E/R

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

to CPU of IPDM E/R.
When the selector lever in the P or N position, power is supplied:

from TCM, and through A/T assembly terminal 9

to IPDM E/R terminal 53.
Ground is supplied:

to IPDM E/R terminals 38, 50 and 60

from body grounds E21, E50 and E51.
With the ignition switch in the START position, and provided that the IPDM E/R receives a starter relay ON sig-
nal from the CAN lines, the IPDM E/R is energized and power is supplied:

from ignition switch terminal 5

to IPDM E/R terminal 4 and

through IPDM E/R terminal 3

to starter motor terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the
engine starts.

SC-16
STARTING SYSTEM
Revision: 2004 November 2004 FX35/FX45
DIAGNOSTIC PROCEDURE 2
Check “S” Connector Circuit
1. CHECK POWER SUPPLY FOR STARTER MOTOR “S” CONNECTOR
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn ignition switch OFF.
4. Disconnect starter motor S connector.
5. Check voltage between starter motor harness connector E312
*1
or F33*2 terminal 1 (B) and ground using a digital circuit tester.
NOTE:
*1: VK45DE, *2: VQ35DE
OK or NG
OK >> GO TO 2.
NG >> Check the following.

40A fusible link (letter F , located in fuse and fusible
link box)

Ignition switch

Starter relay [within the IPDM E/R (intelligent power distribution module engine room)].

Harness for open or short
2. CHECK “S” TERMINAL CONNECTION (VOLTAGE DROP TEST)
1. Turn ignition switch OFF.
2. Connect starter motor S connector.
3. Check voltage between starter motor harness connector E312
*1
or F33*2 terminal 1 (B) and battery positive terminal using a dig-
ital circuit tester.
NOTE:
*1: VK45DE, *2: VQ35DE
OK or NG
OK >> Starter motor “S” connector circuit is OK. Further inspec-
tion necessary. Refer to SC-14, "
WORK FLOW" .
NG >> Check harness between the battery and the starter motor “S” connector for poor continuity.
MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERA-
TURE
When the ignition switch is in START position,
Battery voltage should exist.
PKIA2807E
When the ignition switch is in START position,
Voltage: Less than 1V
PKIA2808E
Engine coolant temperature Voltage V
−30°C to −20°C (−22°F to −4°F) 8.4
−19°C to −10°C (−2°F to 14°F) 8.9
−9°C to 0°C (16°F to 32°F) 9.3
More than 1°C (More than 34°F) 9.7

CHARGING SYSTEM
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Revision: 2004 November 2004 FX35/FX45
CHARGING SYSTEMPFP:23100
System DescriptionAKS0079I
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times:

through 10A fuse (No. 33, located in the fuse and fusible link box)

to alternator terminal 4 (S).
Terminal B supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is
controlled by the IC regulator at terminal 4 (S) detecting the input voltage.
The charging circuit is protected by the 120A fusible link (VK45DE and VQ35DE AWD).
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied:

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

to combination meter terminal 7 for the charge warning lamp.
Ground is supplied:

to combination meter terminal 2

through alternator terminal 3 (L)

to alternator terminal E (VK45DE) or through body ground (VQ35DE)

through body ground E304 (VK45DE).
With power and ground supplied, the charge warning lamp will illuminate. When the alternator is providing suf-
ficient voltage with the engine running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.

CHARGING SYSTEM
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Revision: 2004 November 2004 FX35/FX45
DIAGNOSTIC PROCEDURE 5
Check “S” Terminal Circuit
1. CHECK “S” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check to see if “S” terminal is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair “S” terminal connection. Confirm repair by performing complete Battery/Starting/Charging
system test.
2. CHECK ALTERNATOR “S” TERMINAL CIRCUIT
Check voltage between alternator harness connector E311
*1 or
F26
*2 terminal 4 (LG) and ground using a digital circuit tester.
NOTE:
*1: VK45DE, *2: VQ35DE
OK or NG
OK >> GO TO 3.
NG >> Check the following.

10A fuse (No. 33, located in fuse and fusible link box)

Harness for open or short between alternator and
fuse
3. CHECK “S” TERMINAL CONNECTION (VOLTAGE DROP TEST)
1. Start the engine.
2. When the engine running at idle and warm, check voltage
between alternator connector E311
*1 or F26*2 terminal 4 (LG)
and battery positive terminal using a digital circuit tester.
NOTE:
*1: VK45DE, *2: VQ35DE
OK or NG
OK >> Replace the alternator. Confirm repair by performing
complete Battery/Starting/Charging system test.
NG >> Check harness between the battery and the alternator for poor continuity.
MALFUNCTION INDICATOR
The IC regulator warning function activates to illuminate “CHARGE” warning lamp, if any of the following
symptoms occur while alternator is operating:

Excessive voltage is produced.

No voltage is produced.Battery voltage should exist.
PKIA2816E
Voltage: Less than 0.2V
PKIA2817E