fuse INFINITI FX35 2005 Service Manual

GI-18
HOW TO USE THIS MANUAL
Revision: 2005 July 2005 FX
14 Wire color

This shows a code for the color of the wire.
B = Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light Green BR = Brown
OR or O = Orange
P = Pink
PU or V (Violet) = Purple
GY or GR = Gray
SB = Sky Blue
CH = Dark Brown
DG = Dark Green
When the wire color is striped, the base color is given first, followed by the stripe color as shown
below:
Example: L/W = Blue with White Stripe
15 Option description

This shows a description of the option abbreviation used on the page.
16 Switch

This shows that continuity exists between terminals 1 and 2 when the switch is in the A posi-
tion. Continuity exists between terminals 1 and 3 when the switch is in the B position.
17 Assembly parts

Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell code

This identifies each page of the wiring diagram by section, system and wiring diagram page
number.
19 Current flow arrow

Arrow indicates electric current flow, especially where the direction of standard flow (vertically
downward or horizontally from left to right) is difficult to follow.

A double arrow “ ” shows that current can flow in either direction depending on cir-
cuit operation.
20 System branch

This shows that the system branches to another system identified by cell code (section and
system).
21 Page crossing

This arrow shows that the circuit continues to another page identified by cell code.

The C will match with the C on another page within the system other than the next or preced-
ing pages.
22 Shielded line

The line enclosed by broken line circle shows shield wire.
23 Component box in
wave line

This shows that another part of the component is also shown on another page (indicated by
wave line) within the system.
24 Component name

This shows the name of a component.
25 Connector number

This shows the connector number.

The letter shows which harness the connector is located in.

Example: M : main harness. For detail and to locate the connector, refer to PG section "Main
Harness", “Harness Layout”. A coordinate grid is included for complex harnesses to aid in
locating connectors.
26 Ground (GND)

The line spliced and grounded under wire color shows that ground line is spliced at the
grounded connector.
27 Ground (GND)

This shows the ground connection. For detailed ground distribution information, refer to
"Ground Distribution" in PG section.
28 Connector views

This area shows the connector faces of the components in the wiring diagram on the page.
29 Common component

Connectors enclosed in broken line show that these connectors belong to the same compo-
nent.
30 Connector color

This shows a code for the color of the connector. For code meaning, refer to wire color codes,
Number 14 of this chart.
31 Fusible link and fuse
box

This shows the arrangement of fusible link(s) and fuse(s), used for connector views of
"POWER SUPPLY ROUTING" in PG section.
The open square shows current flow in, and the shaded square shows current flow out.
32 Reference area

This shows that more information on the Super Multiple Junction (SMJ) and Joint Connectors
(J/C) exists on the PG section. Refer to "Reference Area" for details.
Num-
ber Item Description

GI-30
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: 2005 July 2005 FX
Cold or Hot Start Up
On some occasions an electrical incident may occur only when the car is started cold, or it may occur when
the car is restarted hot shortly after being turned off. In these cases you may have to keep the car overnight to
make a proper diagnosis.
CIRCUIT INSPECTION
Introduction
In general, testing electrical circuits is an easy task if it is approached in a logical and organized method.
Before beginning it is important to have all available information on the system to be tested. Also, get a thor-
ough understanding of system operation. Then you will be able to use the appropriate equipment and follow
the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring har-
ness or electrical component to do this.
NOTE:
Refer to “How to Check Terminal” to probe or check terminal.
Testing for “Opens” in the Circuit
Before you begin to diagnose and test the system, you should rough sketch a schematic of the system. This
will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your work-
ing knowledge of the system.
CONTINUITY CHECK METHOD
The continuity check is used to find an open in the circuit. The digital multimeter (DMM) set on the resistance
function will indicate an open circuit as over limit (no beep tone or no ohms symbol). Make sure to always start
with the DMM at the highest resistance level.
To help in understanding the diagnosis of open circuits, please refer to the previous schematic.

Disconnect the battery negative cable.

Start at one end of the circuit and work your way to the other end. (At the fuse block in this example)

Connect one probe of the DMM to the fuse block terminal on the load side.

Connect the other probe to the fuse block (power) side of SW1. Little or no resistance will indicate that
portion of the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an
over limit or infinite resistance condition. (point A)

Connect the probes between SW1 and the relay. Little or no resistance will indicate that portion of the cir-
cuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or infi-
nite resistance condition. (point B)

Connect the probes between the relay and the solenoid. Little or no resistance will indicate that portion of
the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or
infinite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the previous example.
OPEN A circuit is open when there is no continuity through a section of the circuit.
SHORT There are two types of shorts.

SHORT CIRCUIT
When a circuit contacts another circuit and causes the normal resistance to
change.

SHORT TO GROUND When a circuit contacts a ground source and grounds the circuit.
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SERVICE INFORMATION FOR ELECTRICAL INCIDENT GI-31
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VOLTAGE CHECK METHOD
To help in understanding the diagnosis of open circuits please refer to the previous schematic.
In any powered circuit, an open can be found by methodically checking the system for the presence of voltage.
This is done by switching the DMM to the voltage function.

Connect one probe of the DMM to a known good ground.

Begin probing at one end of the circuit and work your way to the other end.

With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).

Close SW1 and probe at relay.
voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).

Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the previous example.
Testing for “Shorts” in the Circuit
To simplify the discussion of shorts in the system, please refer to the following schematic.
RESISTANCE CHECK METHOD

Disconnect the battery negative cable and remove the blown fuse.

Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the
fuse.

Connect one probe of the DMM to the load side of the fuse terminal. Connect the other probe to a known
good ground.

With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.

Close SW1 and disconnect the relay. Put probes at the load side of fuse terminal and a known good
ground. Then, check for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.

Close SW1 and jump the relay contacts with jumper wire. Put probes at the load side of fuse terminal and
a known good ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
VOLTAGE CHECK METHOD

Remove the blown fuse and disconnect all loads (i.e. SW1 open, relay disconnected and solenoid discon-
nected) powered through the fuse.

Turn the ignition key to the ON or START position. Verify battery voltage at the battery + side of the fuse
terminal (one lead on the battery + terminal side of the fuse block and one lead on a known good ground).

With SW1 open and the DMM leads across both fuse terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
SGI847-A

GI-32
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: 2005 July 2005 FX
no voltage; short is further down the circuit than SW1.

With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check
for voltage.
voltage; short is between SW1 and the relay (point B).
no voltage; short is further down the circuit than the relay.

With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:

Remove the ground bolt or screw.

Inspect all mating surfaces for tarnish, dirt, rust, etc.

Clean as required to assure good contact.

Reinstall bolt or screw securely.

Inspect for “add-on” accessories which may be interfering with the ground circuit.

If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the
wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one
eyelet make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to “Ground Distribution” in PG section.
Voltage Drop Tests
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage
drop in a circuit is caused by a resistance when the circuit is in operation.
Check the wire in the illustration. When measuring resistance with DMM, contact by a single strand of wire will
give reading of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire
is not able to carry the current. The single strand will have a high resistance to the current. This will be picked
up as a slight voltage drop.
Unwanted resistance can be caused by many situations as follows:

Undersized wiring (single strand example)

Corrosion on switch contacts

Loose wire connections or splices.
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GW-16
POWER WINDOW SYSTEM
Revision: 2005 July 2005 FX
System DescriptionAIS004PX
WITH FRONT POWER WINDOW ANTI-PINCH SYSTEM
Power is supplied at all time

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

to BCM terminal 55, and

through BCM terminal 54

to power window main switch terminal 19

to front power window switch (passenger side) terminal 10.

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

to BCM terminal 42.
With ignition switch in ON or START position,
Power is supplied

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

to BCM terminal 38, and

trough BCM terminal 53

to power window main switch terminal 10

to rear power window switch (LH and RH) terminal 1.
Ground supplied

to BCM terminal 49 and 52

through body grounds M35, M45 and M85.

to power window main switch terminal 17

through body grounds M35, M45 and M85.

to front power window switch (passenger side) terminal 11

through body grounds M35, M45 and M85.
WITH FRONT AND REAR WINDOW ANTI-PINCH SYSTEM
Power is supplied at all time

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

to BCM terminal 55, and

through BCM terminal 54

to power window main switch terminal 19

to front power window switch (passenger side) terminal 10

to rear power window switch (LH and RH) terminal 10.

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

to BCM terminal 42.
With ignition switch in ON or START position,
Power is supplied

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

to BCM terminal 38, and

through BCM terminal 53

to power window main switch terminal 10
Ground supplied

to BCM terminal 49 and 52

through body grounds M35, M45 and M85.

to power window main switch terminal 17

through body grounds M35, M45 and M85.

to front power window switch (passenger side) terminal 11

through body grounds M35, M45 and M85.

to rear power window switch (LH and RH) terminal 11

through body grounds B15 and B45.

GW-28
POWER WINDOW SYSTEM
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Terminal and Reference Value for BCM / With Front Power Window Anti-Pinch
System
AIS004Q2
Terminal Wire color Item Condition Voltage [V]
(Approx.)
12 P/B Front door switch
passenger side signal ON (Open) 0
OFF (Close) Battery voltage
22 OR Power window serial link IGN SW ON or power window
timer operating.
38 W/L Ignition switch (ON or START) Ignition switch
(ON or START position) Battery voltage
39 L CAN - H — —
40 R CAN - L — —
42 L/R Power source (Fuse) — Battery voltage
49 B Ground (signal) — 0
52 B Ground (power) — 0
53 Y/B Rap signal IGN SW ON Battery voltage
Within 45 second after ignition
switch is turned to OFF Battery voltage
When driver side or passenger
side door is open in power win-
dow timer is operates 0
54 W Power window power supply — Battery voltage
55 G Power source (Fusible link) — Battery voltage
62 W Front door switch
driver side signal ON (Open) 0
OFF (Close) Battery voltage
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POWER WINDOW SYSTEM GW-37
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Terminal and Reference Value for BCM / With Front and Rear Power Window
Anti-Pinch
AIS004Q7
Terminal Wire color Item Condition Voltage [V]
(Approx.)
12 P/B Front door switch
passenger side signal ON (Open) 0
OFF (Close) Battery voltage
22 OR Power window serial link IGN SW ON or power window
timer operating.
38 W/L Ignition switch (ON or START) Ignition switch
(ON or START position) Battery voltage
39 L CAN - H — 0
40 R CAN - L — 0
42 L/R Power source (Fuse) — Battery voltage
49 B Ground (signal) — 0
52 B Ground (power) — 0
53 Y/B Rap signal IGN SW ON Battery voltage
Within 45 second after ignition
switch is turned to OFF Battery voltage
When driver side or passenger
side door is open in power win-
dow timer is operates 0
54 W Power window power supply — Battery voltage
55 G Power source (Fusible link) — Battery voltage
62 W Front door switch
driver side signal ON (Open) 0
OFF (Close) Battery voltage
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POWER WINDOW SYSTEM GW-45
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BCM Power Supply and Ground Circuit CheckAIS004QE
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 GW-15, "
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
Check voltage between BCM connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check BCM power supply circuit for open or short.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM connector M4 terminal 49, 52 and ground.
OK or NG
OK >> Power supply and ground circuit are OK.
NG >> Check BCM ground circuit for open or short.
Connector Terminal (Wire color)
Condition of
ignition switch Voltage [V]
(Approx.)
(+) (–)
M3 38 (W/L) Ground ON
Battery
voltage
M4 42 (L/R)
OFF
55 (G)
PIIB1383E
49 (B) – Ground : Continuity should exist.
52 (B) – Ground : Continuity should exist.
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REAR WINDOW DEFOGGER
Revision: 2005 July 2005 FX
REAR WINDOW DEFOGGERPFP:25350
Component Parts and Harness Connector LocationAIS004QY
System DescriptionAIS004QZ
The rear window defogger system is controlled by BCM (Body Control Module) and IPDM E/R (Intelligent
Power Distribution Module Engine Room).
The rear window defogger operates only for approximately 15 minutes.
Power is at all times supplied

through 20A fuse [No. 75, located in the IPDM E/R]

to rear window defogger relay terminals 3,

through 20A fuse [No. 80, located in the IPDM E/R]

to rear window defogger relay terminals 6,

through 10A fuse [No. 12, located in the fuse block]
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REAR WINDOW DEFOGGER GW-87
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to rear window defogger relay terminal 1,

through 15A fuse [No. 32, located in the fuse block (J/B)]

to A/C and AV switch terminal 1,

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.
With the ignition switch turned to ON or START position,
Power is supplied

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

to BCM terminal 38.
Ground is supplied

to BCM terminal 49 and 52

through body grounds M35, M45 and M85,

to A/C and AV switch terminal 5

through body grounds M35, M45 and M85,

to IPDM E/R terminals 38 and 60

through body grounds E21, E50 and E51.
When rear window defogger switch in A/C and AV switch is turned to ON,
Ground is supplied

to BCM terminal 9

through A/C and AV switch terminal 16

through A/C and AV switch terminal 5 and

through body grounds M35, M45 and M85.
Then rear window defogger switch is illuminated.
Then BCM recognizes that rear window defogger switch is turned to ON.
Then it sends rear window defogger switch signals to IPDM E/R, display control unit (with navigation system)
or display unit (without navigation system) via DATA LINE (CAN H, CAN L).
When display control unit (with navigation system) or display unit (without navigation system) receives rear
window defogger switch signals, and display on the screen.
When IPDM E/R receives rear window defogger switch signals,
Ground is supplied

to rear window defogger relay terminal 2

through IPDM E/R terminal 52

through IPDM E/R terminals 38 and 60 and

through body grounds E21, E50 and E51.
And then rear window defogger relay is energized.
When rear window defogger relay is turned ON, signals are transmitted.

through rear window defogger relay terminals 5 and 7

to rear window defogger terminal 1
Rear window defogger terminal 2 is grounded through grounds B15 and B45.
With power and ground supplied, rear window defogger filaments heat and defog the rear window.
When rear window defogger relay is turned to ON,
Power is supplied

through rear window defogger relay terminal 7

through fuse block (J/B) terminal 2C

through 15A fuse [No. 8, located in the fuse block (J/B)] and

through fuse block (J/B) terminal 5B

to door mirror defogger (driver side and passenger side) terminal 1.
Door mirror defogger (driver side and passenger side) terminal 2 is grounded through body grounds M35, M45
and M85.