INFINITI FX35 2007 Service Manual

COMBINATION METERS DI-25
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Revision: 2006 July 2007 FX35/FX45
Fuel Level Sensor Unit and Pump (Main) Harness
Check continuity at following terminals.

If the results of check are NG, replace fuel pump assembly. If the
results of check are OK, replace fuel level sensor unit.
Fuel Level Sensor Unit (Sub)
Check resistance between terminals 1 and 2.
*1 and *2: When float rod is in contact with stopper.
Removal and Installation of Combination MeterNKS003IC
Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
Disassembly and Assembly of Combination MeterNKS002ZY
Terminal Continuity
2 - Signal terminal (A) Ye s
5 - Ground terminal (B)
SKIB3551J
Terminal Float position [mm (in)] Resistance
value [ Ω]
12 *1 Full 6 (0.24) Approx. 3
*2 Empty 203 (7.99) Approx. 48
SKIB8530E
1. Rear cover 2. Screws 3. Plate
4. Unified meter control unit assembly 5. Front cover 6. Reinforcing metal
7. Switch and meter housing
SKIA5790E

DI-26
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
DISASSEMBLY
1. Remove screws (A) and remove rear cover (1).
2. Disconnect odo/trip meter and illumination control switch con- nector (2).
3. Remove screws (A).
4. Remove tabs (A) and remove switch and meter housing (1).
5. Remove screws (A) and remove reinforcing metal (1).
SKIB8477E
SKIB8478E
SKIB8479E
SKIB8480E

COMBINATION METERS DI-27
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Revision: 2006 July 2007 FX35/FX45
6. Remove screws (A) and remove plate (1).
7. Disengage tabs (A) to separate front cover (1).
ASSEMBLY
Assembly is the reverse order of disassembly.
Removal and Installation of Odo/Trip Meter and Illumination Control SwitchNKS002ZZ
REMOVAL
1. Remove combination meter. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove switch and meter housing. Refer to DI-25, "
Disassembly and Assembly of Combination Meter" .
3. Remove screws (2), and remove switch assembly.
4. Remove screws (5), and remove odo/trip meter and illumination control switch.
INSTALLATION
Installation is the reverse order of removal.
SKIB8481E
SKIB8482E
SKIA5795E
SKIA5796E

DI-28
UNIFIED METER AND A/C AMP
Revision: 2006 July 2007 FX35/FX45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionNKS00300

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

The unified meter and A/C amp. corresponds to a CONSULT-II function (self-diagnosis results, CAN diag-
nosis support monitor, data monitor).
COMBINATION METER CONTROL FUNCTION

Unified meter and A/C amp. receives necessary information for combination meter from each unit by CAN
communication.

Unified meter and A/C amp. transmits a signals with communication line (TX, RX) between unified meter
and A/C amp. and combination meter.
Input/output signals between unified meter and A/C amp. and combination meter.
NOTE:
Combination meter performs fail-safe operation when unified meter and A/C amp. communication is malfunctioning. Refer to DI-8,
"FAIL-SAFE" . Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Low tire pressure warning lamp signal

Run-flat tire warning lamp signal

Brake warning lamp signal

A/T CHECK warning lamp signal

ICC warning lamp signal

Oil pressure switch signal

Door switch signal

AWD warning lamp signal

Key warning lamp signal

VDC OFF indicator lamp signal

SLIP indicator lamp signal

CRUISE indicator lamp signal

SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

Shift position indicator signal

Manual mode indicator signal

Manual mode gear position signal

CAN communication condition signal of A/T

Position lights request signal

Buzzer output signal

UNIFIED METER AND A/C AMP DI-29
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Revision: 2006 July 2007 FX35/FX45
A/C AUTO AMP. FUNCTION
Unified meter and A/C amp. controls each operation for A/C auto amp. Regarding A/C control, refer to AT C -
30, "AIR CONDITIONER CONTROL" in ATC section.
OTHER FUNCTIONS
Drive Computer Function
The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and transmitted to the display unit (without NAVI) and display control unit (with
NAVI) using CAN communication.
Signal Buffer Function
Unified meter and A/C amp. transmits each signal to other units with CAN communication.

DI-30
UNIFIED METER AND A/C AMP
Revision: 2006 July 2007 FX35/FX45
SchematicNKS00303
TKWM4365E

UNIFIED METER AND A/C AMP DI-31
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Revision: 2006 July 2007 FX35/FX45
CONSULT-II Function (METER A/C AMP)NKS00304
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAG RESULTS
Operation Procedure
1. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
2. Self-diagnosis results are displayed.
Display Item List
NOTE:
“TIME” means the following.

0: Means detected malfunction at present. (From malfunction detection to turning ignition switch OFF)

1 - 63: Means detected malfunction in the past. (Displays the number of ignition switch OFF → ON after
detecting malfunction. “SELF-DIAG RESULTS” is erased when exceeding “63”.)
System Diagnosis mode Description Reference
page
METER A/C AMP SELF-DIAG RESULTS
Unified meter and A/C amp. checks the conditions and dis-
plays memorized error. DI-31
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communi-
cation can be read. LAN-44
DATA MONITOR
Displays unified meter and A/C amp. input data in real
time. DI-32
SKIA4956E
Display item [Code] Malfunction is detected when...
Reference
page
CAN COMM CIRC [U1000] When a unified meter and A/C amp. is not transmitting or receiving CAN communica-
tion signal for 2 seconds or more. DI-34
METER COMM CIRC [B2202] Malfunction is detected in communication of between combination meter and unified
meter and A/C amp. DI-34
VEHICLE SPEED CIRC [B2205] When an erroneous speed signal is input for 1 second.
CAUTION:
Even when there is no malfunction on speed signal system, malfunction may be
misinterpreted when battery has low voltage (when maintaining 7 - 8 V for about
2 seconds). DI-37

DI-32
UNIFIED METER AND A/C AMP
Revision: 2006 July 2007 FX35/FX45
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch either “MAIN SIGNALS” or “SELECTION FROM MENU” on the “DATA MONITOR” screen.
3. When “SELECTION FROM MENU” is selected, touch individual items to be monitored. When “MAIN SIG- NALS” is selected, main items will be monitored.
4. Touch “START”.
5. Touch “RECORD” while monitoring, then the status of the moni- tored item can be recorded. To stop recording, touch “STOP”.
Display Item List
X: Applicable
MAIN SIGNALS Monitors main signals.
SELECTION FROM MENU Selects and monitors individual signal.
SKIA4957E
Display item [Unit] MAIN
SIGNALS SELECTION
FROM MENU Contents
SPEED METER [km/h] or [mph] X X Displays the value of vehicle speed signal, which is input from
ABS actuator and electric unit (control unit).
SPEED OUTPUT [km/h] or [mph] X X Displays the value of vehicle speed signal, which is transmitted
to each unit with CAN communication.
TACHO METER [rpm] X X Displays the value of engine speed signal, which is input from
ECM.
W TEMP METER [ °C] or [ °F] X X Displays the value of engine coolant temperature signal, which
is input from ECM.
FUEL METER [lit.] X X Displays the value, which processes a resistance signal from
fuel gauge.
DISTANCE [km] or [mile] X X Displays the value, which is calculated by vehicle speed signal
from ABS actuator and electric unit (control unit), fuel gauge and
fuel consumption from ECM.
FUEL W/L [ON/OFF] X X Indicates [ON/OFF] condition of low-fuel warning lamp.
MIL [ON/OFF] X Indicates [ON/OFF] condition of malfunction indicator lamp.
AIR PRES W/L [ON/OFF] X Indicates [ON/OFF] condition of low tire pressure warning lamp.
SEAT BELT W/L [ON/OFF]
*1X Indicates [ON/OFF] condition of seat belt warning lamp.
BUZZER [ON/OFF] X X Indicates [ON/OFF] condition of buzzer.
DOOR W/L [ON/OFF] X Indicates [ON/OFF] condition of door warning lamp.
HI-BEAM IND [ON/OFF] X Indicates [ON/OFF] condition of high beam indicator.
TURN IND [ON/OFF] X Indicates [ON/OFF] condition of turn indicator.
OIL W/L [ON/OFF] X Indicates [ON/OFF] condition of oil pressure warning lamp.
VDC/TCS IND [ON/OFF] X Indicates [ON/OFF] condition of VDC OFF indicator lamp.
ABS W/L [ON/OFF] X Indicates [ON/OFF] condition of ABS warning lamp.
SLIP IND [ON/OFF] X Indicates [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF]
*2X Indicates [ON/OFF] condition of brake warning lamp.
KEY G W/L [ON/OFF] X Indicates [ON/OFF] condition of key warning lamp (green).

UNIFIED METER AND A/C AMP DI-33
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Revision: 2006 July 2007 FX35/FX45
NOTE:
Monitored item that does not match the vehicle is deleted from the display automatically.
*1: It dose not change when fastening or unfastening the passenger seat belt.
*2: Monitor keeps indicating “OFF” when brake warning lamp is on by the parking brake operation or low brake fluid level.
Power Supply and Ground Circuit InspectionNKS003HN
1. CHECK FUSE
Check for blown unified meter and A/C amp. fuses.
OK or NG
OK >> GO TO 2.
NG >> Be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-3, "
POWER
SUPPLY ROUTING CIRCUIT" .
KEY R W/L [ON/OFF] X Indicates [ON/OFF] condition of key warning lamp (red).
KEY KNOB W/L [ON/OFF] X Indicates [ON/OFF] condition of key knob warning lamp.
M RANGE SW [ON/OFF] X X Indicates [ON/OFF] condition of manual mode range switch.
NM RANGE SW [ON/OFF] X X Indicates [ON/OFF] condition of except for manual mode range
switch.
AT SFT UP SW [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift-up switch.
AT SFT DWN SW [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift-down switch.
BRAKE SW [ON/OFF] X Indicates [ON/OFF] condition of brake switch (stop lamp switch).
AT-M IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T manual mode indicator.
AT-M GEAR [5-1] X X Indicates [5-1] condition of A/T manual mode gear position.
P RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift P range indicator.
R RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift R range indicator.
N RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift N range indicator.
D RANGE IND [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift D range indicator.
AT CHECK W/L X Indicates [ON/OFF] condition of AT CHECK warning lamp.
CRUISE IND [ON/OFF] X Indicates [ON/OFF] condition of CRUISE indicator lamp.
SET IND [ON/OFF] X Indicates [ON/OFF] condition of SET indicator lamp.
CRUISE W/L [ON/OFF] X Indicates [ON/OFF] condition of ICC warning lamp.
4WD LOCK SW [ON/OFF] X This item is not used for this model. “OFF” is always displayed.
4WD LOCK IND [ON/OFF] X This item is not used for this model. “OFF” is always displayed.
4WD W/L [ON/OFF] X Indicates [ON/OFF] condition of AWD warning lamp.
RR COMB STATE [OK/NG] X Indicates [OK/NG] condition of rear combination lamp circuit. Display item [Unit]
MAIN
SIGNALS SELECTION
FROM MENU Contents
Power source Fuse No.
Battery power supply 19 ACC power supply 10, 11
Ignition power supply 12

DI-34
UNIFIED METER AND A/C AMP
Revision: 2006 July 2007 FX35/FX45
2. CHECK POWER SUPPLY CIRCUIT
Check voltage between unified meter and A/C amp. harness con-
nector terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness between unified meter and A/C amp. and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between unified meter and A/C amp. harness connector M56 terminals 29, 30 and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
DTC [U1000] CAN Communication CircuitNKS00305
Symptom: Display “CAN COMM CIRC [U1000]” at the result of self-diagnosis for unified meter and A/C amp.
1. CHECK CAN COMMUNICATION
1. Select “SELF-DIAG RESULTS” mode for “METER A/C AMP” with CONSULT-II.
2. Print out CONSULT-II screen.
>> Go to “LAN system”. Refer to LAN-49, "
CAN System Specification Chart" .
DTC [B2202] Meter Communication CircuitNKS00306
Symptom: Display “METER COMM CIRC [B2202]” at the result of self-diagnosis for unified meter and A/C
amp.
1. CHECK CONNECTOR
Check combination meter, unified meter and A/C amp. and terminals (combination meter side, unified meter
and A/C amp. side, and harness side) for looseness or bent terminals.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
Terminals Ignition switch position
(+) (–) OFF ACC ON
Connector Terminal
M56 21
Ground Battery
voltage Battery
voltage Battery
voltage
22 0 V 0 V Battery
voltage
M57 46 0 V Battery
voltage Battery
voltage
PKIB3570E
29 – Ground : Continuity should exist.
30 – Ground
SKIA5202E