2004 INFINITI FX35 Fuel system

POWER DOOR LOCK SYSTEM
BL-41
C
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E
F
G
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K
L
MA
B
BL
Revision: 2004 November 2004 FX35/FX45
Trouble Diagnosis Chart by SymptomAIS004M0
Always check the “Work Flow” before troubleshooting. Refer to BL-37, "Work Flow" .
*1 : Lock operation
*2 : Unlock operation
*3 : Driver side
*4 : Except driver sideSymptom Diagnoses service procedureReference
page
Key reminder door system does not operate properly.1.Check key reminder door mode.*
*: Key reminder door mode can be changed.
First check key reminder door mode.BL-40
2. Preliminary CheckBL-38
3. Check key switch.BL-46
4. Check door switch. BL-42
5. Replace BCM.BCS-15
Power door lock does not operate with door lock and unlock switch.1. Preliminary checkBL-382. Check door lock and unlock switch.BL-48
3. Replace BCM.BCS-15
Power door lock does not operate with door key cylinder operation.
(Power door lock operate properly with door lock and unlock switch.)1. Check front door key cylinder switch.BL-53*1
BL-54*2
2. Replace power window main switch. –
Specific door lock actuator does not operate.1. Check door lock actuator.BL-50
*3
BL-51*4
2. Replace BCM.BCS-15
All door lock actuator (except passenger side and fuel lid) does not
operate.*
*: Only model with intelligent key system.1. Check select unlock relay circuit.BL-55
Select unlock does not operate.
(All other power door lock system is “OK”.)1. Check select unlock mode.*
*: Select unlock mode can be changed.
First check select unlock mode.BL-40
2. Replace BCM.BCS-15
Fuel lid opener actuator does not operate.
(All door lock actuators operates properly.)1.Check fuel lid opener actuator.BL-52

BL-52
POWER DOOR LOCK SYSTEM
Revision: 2004 November 2004 FX35/FX45
2. CHECK DOOR LOCK ACTUATOR SIGNAL
Check voltage between BCM connector M4 terminals 50, 51 and
ground.
OK or NG
OK >> Replace front door lock assembly (passenger side) or rear door lock actuator LH/RH.
NG >> Replace BCM.
Check Fuel Lid Opener Actuator AIS004M6
1. CHECK FUEL LID OPENER ACTUATOR HARNESS
1. Turn ignition switch OFF.
2. Disconnect BCM and fuel lid lock actuator connector.
3. Check continuity between BCM connector M4 terminals 44, 50
and fuel lid lock actuator connector B70 terminals 1, 2.
4. Check continuity between BCM connector M4 terminals 44, 50
and ground.
OK or NG
OK >> Replace fuel lid actuator.
NG >> Repair or replace harness.
Con-
nectorTerminal
(Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
M450 (PU)
GroundDoor lock/unlock switch
is turned to LOCK.0 → Battery voltage
51 (W/B)Door lock/unlock switch
is turned to UNLOCK.0 → Battery voltage
PIIA6385E
44 (Y) – 2 (L) : Continuity should exist.
50 (PU) – 1 (PU) : Continuity should exist.
44 (Y) – Ground : Continuity should not exist.
50 (PU) – Ground : Continuity should not exist.
PIIA6386E

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2004 November 2004 FX35/FX45
SYSTEM DESCRIPTIONPFP:00000
System DiagramAFS001SB
VDC FunctionAFS001SC

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under steer-
ing / over steering) is determined from information from G-sensor, wheel sensor, etc., and this information
is used to improve vehicle stability by controlling the braking and engine power to all four wheels.

SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, body and brake pedal lightly vibrate and mechanical noises may be heard. This is
normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when vehicle is sub-
ject to strong shaking or large vibration, such as when vehicle is on a turn table, a ship or a steep slope
such as bank while engine is running. In this case, restart engine on a normal road, and if ABS warning
lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no problem.
TCS FunctionAFS001SD

The wheel spin of the drive wheels is detected by ABS actuator and electric unit (control unit) from the
wheel speed signals from four wheels, so if wheel spin occurs, drive wheel right and left brake fluid pres-
sure control and engine fuel cut are performed while throttle value is restricted to reduce the engine
torque and decrease the amount of wheel spin. In addition, the degree throttle is opened is controlled to
achieve the optimum engine torque.

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

TCS may be activated any time vehicle suddenly accelerates, suddenly down/upshifts, or is driven on a
road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
ABS FunctionAFS001SE

The anti-lock brake system is a function that detects wheel revolution while braking, and it improves han-
dling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.

If the electrical system breaks down, then the fail-safe function starts, the ABS becomes inoperative, and
ABS warning lamp turns on.

Electrical system diagnosis by CONSULT-II is available.

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
SFIA1160E

BRC-30
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Note 1: After completing repairs of shorted sensor circuit, when turn ignition switch ON, ABS warning lamp
turned on. Check that ABS warning lamp turned off while driving vehicle at approximately 30 km/h (19 MPH)
or more for approximately 1 minute according to self-diagnosis procedure. In addition, if wheel sensor 2 is dis-
played for wheels, check wheel sensor circuit and also check ABS actuator and electric unit (control unit)
power voltage.
Note 2: If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for
CAN communication line first.
Note 3: “ACTUATOR RLY” on the CONSULT-II self-diagnostic results indicates the malfunction of actuator
relay or circuit. Actuator relay is imbedded in ABS actuator and electric unit (control unit).
DATA MONITOR
Operation Procedure
1. After turning OFF ignition switch, connect CONSULT-II and CONVERTER to data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
2. Turn ignition switch ON.
3. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAN COMM CIRCUIT
[U1000]

CAN communication line is open or shorted.

ABS actuator and electric unit (control unit) internal malfunc-
tion

Battery voltage for EMC is suddenly interrupted for approxi-
mately 0.5 seconds or more.BRC-53, "
Inspection 14:
CAN Communication
System" (Note 2)
BR FLUID LEVEL LOW
[C1155]Brake fluid level drops or circuit between ABS actuator and elec-
tric unit (control unit) and brake fluid level switch is open or
shorted.BRC-51, "
Inspection 11:
Brake Fluid Level Switch
System"
VARIANT CODING
[C1170]V coding is not functioning.ABS actuator and elec-
tric unit (control unit) and
circuit
G - SENSOR (AWD model)
[C1113]Decel G sensor is malfunctioning, or signal line of Decel G sen-
sor is open or shorted.BRC-44, "
Inspection 6:
Yaw Rate/Side G-Sensor
(2WD model), Yaw Rate/
Side/Decel G-sensor
(AWD models) System"
ENGINE SIGNAL 1
[C1130]Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine fuel cut system is malfunction-
ing.–
ENGINE SIGNAL 2
[C1131]Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine ETC system is malfunctioning.–
ENGINE SIGNAL 3
[C1132]Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine CAN system is malfunctioning.–
ENGINE SIGNAL 4
[C1133]Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine torque down system is malfunc-
tioning.–
ENGINE SIGNAL 6
[C1136]Based on the signal from ECM, ABS actuator and electric unit
(control unit) judges that engine control system is malfunctioning.–
ACTUATOR RLY
[C1140] (Note 3)

Actuator solenoid valve relay is ON, even if control unit sends
off signal.

Actuator solenoid valve relay is OFF, even if control unit sends
on signal.BRC-47, "
Inspection 8:
Actuator Motor System"
DECEL G SEN SET (AWD model)
[C1160]Neutral position correction of Decel G -sensor is not finished.BRC-52, "
Inspection 13:
When “DECEL G SEN
SET” Appears on Self-
Diagnosis Results Dis-
play (AWD Model)"
Self-diagnostic item Malfunction detecting condition Check system

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
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L
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SECTION DI
A
B
DI
Revision: 2004 November 2004 FX35/FX45
DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
COMBINATION METERS ........................................... 4
System Description .................................................. 4
UNIFIED METER CONTROL UNIT ...................... 4
UNIFIED METER AND A/C AMP. ......................... 4
HOW TO CHANGE THE DISPLAY FOR ODO/
TRIP METER ........................................................ 5
POWER SUPPLY AND GROUND CIRCUIT ........ 5
WATER TEMPERATURE GAUGE ........................ 6
TACHOMETER ..................................................... 6
FUEL GAUGE ....................................................... 6
SPEEDOMETER ................................................... 6
Component Parts and Harness Connector Location ..... 6
Combination Meter ................................................... 7
CHECK .................................................................. 7
Circuit Diagram ........................................................ 8
Wiring Diagram — METER — .................................. 9
Terminals and Reference Value for Combination
Meter ....................................................................... 11
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 12
Meter/Gauge Operation and Odo/Trip Meter ......... 12
SELF-DIAGNOSIS FUNCTION .......................... 12
HOW TO ALTERNATE DIAGNOSIS MODE ....... 12
CONSULT-II Function ............................................ 13
How to Proceed With Trouble Diagnosis ................ 13
Diagnosis Flow ....................................................... 13
Power Supply and Ground Circuit Inspection ........ 15
Symptom Chart 1 ................................................... 16
Symptom Chart 2 ................................................... 16
Vehicle Speed Signal Inspection ............................ 17
Engine Speed Signal Inspection ............................ 18
Water Temperature Signal Inspection .................... 19
Fuel Level Sensor Signal Inspection 1 ................... 20
FUEL GAUGE ..................................................... 20
Fuel Level Sensor Signal Inspection 2 ................... 21LOW-FUEL WARNING LAMP ............................. 21
CAN Communication System Inspection ................ 22
Communication Line Inspection ............................. 22
Odo/Trip Meter and Illumination Control Switch
Inspection ............................................................... 24
Fuel Gauge Pointer Fluctuates, Indicator Wrong
Value or Varies ....................................................... 24
Fuel Gauge Does Not Move to FULL position ........ 25
Electrical Components Inspection .......................... 25
CHECK FUEL LEVEL SENSOR UNIT ................ 25
Removal and Installation ........................................ 26
COMBINATION METER ASSEMBLY .................. 26
Disassembly and Assembly for Combination Meter ... 26
DISASSEMBLY ................................................... 26
ASSEMBLY ......................................................... 27
Removal and Installation of Odo/Trip Meter and Illu-
mination Control Switch .......................................... 27
REMOVAL ........................................................... 27
INSTALLATION ................................................... 27
UNIFIED METER AND A/C AMP .............................. 28
System Description ................................................. 28
INPUT/OUTPUT SIGNALS ................................. 28
FAIL-SAFE .......................................................... 29
CAN Communication System Description .............. 29
CAN Communication Unit ....................................... 29
Schematic ............................................................... 30
CONSULT-II Function ............................................. 31
CONSULT-II BASIC OPERATION ....................... 31
SELF-DIAGNOSTIC RESULTS ........................... 32
DATA MONITOR ................................................. 32
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 34
REMOVAL ........................................................... 34
INSTALLATION ................................................... 34
COMPASS ................................................................. 35
System Description ................................................. 35
DIRECTION DISPLAY ......................................... 35
Wiring Diagram – COMPAS – ................................ 37
Removal and Installation of Compass .................... 38
WARNING LAMPS .................................................... 39

DI-4
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
COMBINATION METERSPFP:24814
System DescriptionAKS005MH
UNIFIED METER CONTROL UNIT

Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the
unified meter control unit, which is built into the combination meter. Unified meter control unit receives sig-
nals from unified meter and A/C amp.

Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified
meter and A/C amp.

Digital meter is adopted for odo/trip meter*.
*The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.

Odo/trip meter, A/T indicator and ICC system display segments can be checked in diagnosis mode.

Meters/gauges can be checked in diagnosis mode.
Illumination Control
The unified meter control unit outputs the odo/trip meter and A/T
indicator lighting when the ignition switch is turned on. When the
lighting switch is turned on, light on for the combination meter dial,
illumination control switch and external lighting are output. In addi-
tion, when the lighting switch is turned on, the illumination control
switch on the left side of the combination meter can be used to
adjust the brightness of each light. The brightness can be adjusted
to sixteen different levels: From 0 (no lights) to 15 (maximum).
Pressing the illumination control switch will brighten or darken the
lights. When the key switch is in the START position, the combina-
tion meter dial lighting and illumination control switch lighting are
turned off.
UNIFIED METER AND A/C AMP.
Refer to DI-28, "System Description" in “UNIFIED METER AND A/C AMP”.
SKIA4795E

DI-12
COMBINATION METERS
Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Value for Unified Meter and A/C Amp.AKS005MN
Meter/Gauge Operation and Odo/Trip MeterAKS005MO
SELF-DIAGNOSIS FUNCTION

Odo/trip meter segment, A/T indicator segment and ICC system display segment operation can be
checked in self-diagnosis mode.

Meters/gauges can be checked in self-diagnosis mode.
HOW TO ALTERNATE DIAGNOSIS MODE
1. Turn ignition switch ON, and switch the odo/trip meter to “trip A” or “trip B”.
NOTE:
If the diagnosis function is activated with the trip meter A displayed, the mileage on the trip meter A will
indicate 0000.0, but the actual trip mileage will be retained. (Trip B operates the same way.)
2. Turn ignition switch OFF.
36 — Trip transfer switch OFFTrip transfer switch is pushed Approx. 0V
Trip transfer switch is released Approx. 5V Terminal
No.Wire
colorItemCondition
Reference value
Ignition
switchOperation or condition
Terminal
No.Wire
colorItemCondition
Reference value
Ignition
switchOperation or condition
1 L CAN H — — —
9PUTX communication line (To
combination meter)ON —
11 R C A N L — — —
19 L/BRX communication line (From
combination meter)ON —
21 R/W Battery power supply OFF — Battery voltage
22 G/R Ignition switch ON or START ON — Battery voltage
26 R/GVehicle speed signal
(8-pulse)ONSpeedometer operated
[When vehicle speed is
approx. 40 km/h (25 MPH)]
28 W/B Fuel level sensor signal — —Refer to DI-25, "
CHECK FUEL
LEVEL SENSOR UNIT" .
29 B Ground (for power) ON — Approx. 0V
30 B Ground ON — Approx. 0V
36 B/W Fuel level sensor ground ON — Approx. 0V
46 L/W Ignition switch ACC or ON ACC — Battery voltage
SKIA3362E
SKIA3361E
PKIA1935E

COMBINATION METERS
DI-13
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G
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MA
B
DI
Revision: 2004 November 2004 FX35/FX45
3. Turn ignition switch ON while pressing trip transfer switch and
trip reset switch at the same time.
4. After ignition switch is turned ON, release trip transfer switch
and trip reset switch. (With 7 seconds after the ignition switch is
turned ON.)
5. All the segments on the odo/trip meter, A/T indicator and ICC
system display illuminates, and simultaneously the low-fuel
warning lamp indicator illuminates. At this time, the unified meter
control unit is turned to diagnosis mode.
NOTE:
If any of the segments is not displayed, replace combination
meter.
6. Push the odo/trip meter switch. Each meter/gauge should indi-
cate as shown in the figure while pushing odo/trip meter switch.
(At this time, the low-fuel warning lamp goes off.)
CONSULT-II FunctionAKS005MP
Refer to DI-31, "CONSULT-II Function" in “UNIFIED METER AND A/C AMP”.
How to Proceed With Trouble DiagnosisAKS005MQ
1. Confirm the symptom or customer complaint.
2. Perform diagnosis according to diagnosis flow. Refer to DI-13, "
Diagnosis Flow" .
3. According to the symptom chart, repair or replace the cause of the symptom.
4. Does the meter operate normally? If so, go to 5. If not, go to 2.
5. INSPECTION END
Diagnosis FlowAKS005MR
1. CHECK SELF-DIAGNOSTIC RESULTS OF UNIFIED METER AND A/C AMP.
1. Start engine.
2. Select “METER A/C AMP” on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp.
Refer to DI-31, "
CONSULT-II Function" .
3. After erasing the self-diagnostic results, perform self-diagnosis again.
Self-diagnostic results content
No malfunction detected>>GO TO 2.
Malfunction detected>> Go to DI-16, "
Symptom Chart 2" .
SKIA4817E
SKIA6170E
SKIA4831E