INFINITI FX35 2007 Service Manual

COMBINATION METERS DI-5
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Revision: 2006 July 2007 FX35/FX45
COMBINATION METERSPFP:24814
System DescriptionNKS002ZC
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.

Odo/trip meter, shift position indicator and ICC system display segments can be checked in self-diagnosis
mode.

Meters/gauges can be checked in self-diagnosis mode.
UNIFIED METER AND A/C AMP.
Refer to DI-28, "COMBINATION METER CONTROL FUNCTION" in “UNIFIED METER AND A/C AMP”.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

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

to combination meter terminal 8, and

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

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

to unified meter and A/C amp. terminal 22.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to combination meter terminal 4,

through 15A fuse [No. 10, located in the fuse block (J/B)], and

through 15A fuse [No. 11, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 46.
Ground is supplied

to combination meter terminals 5, 6 and 15

through grounds M35, M45 and M85,

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

through grounds M35, M45 and M85.

DI-6
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
SPEEDOMETER
The speedometer indicates the vehicle speed.

ABS actuator and electric unit (control unit) provides a vehicle speed signal to the unified meter and A/C
amp. with CAN communication.

Unified meter and A/C amp. converts the vehicle speed signal to the 8-pulse signal, and outputs the vehi-
cle speed signal (8-pulse) to combination meter.

Combination meter indicates the vehicle speed according to vehicle speed signal (8-pulse) signal.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).

ECM provides engine speed signal to unified meter and A/C amp. with CAN communication.

Unified meter and A/C amp. transmits engine speed signal to combination meter with communication line.

Combination meter indicates the engine speed according to engine speed signal.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.

ECM provides engine coolant temperature signal to unified meter and A/C amp. with CAN communica-
tion.

Unified meter and A/C amp. transmits engine coolant temperature signal to combination meter with com-
munication line.

Combination meter indicates the engine coolant temperature according to engine coolant temperature
signal.
SKIB7332E
PKIB7631E
PKIB7632E

COMBINATION METERS DI-7
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Revision: 2006 July 2007 FX35/FX45
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.

Unified meter and A/C amp. reads a resistor signal from fuel level sensor.
Signal is supplied
–from unified meter and A/C amp. terminal 36
–through the fuel level sensor unit and fuel pump (main) terminals 5 and 2, and
–through the fuel level sensor unit (sub) terminals 2 and 1
–to unified meter and A/C amp. terminal 28 for the fuel gauge.

Unified meter and A/C amp. provides a fuel level signal to combination meter with communication line.

Combination meter indicates the approximate fuel level according to the fuel level signal.
ODO/TRIP METER

ABS actuator and electric unit (control unit) provides a vehicle speed signal to the unified meter and A/C
amp. with CAN communication.

Unified meter and A/C amp. converts the vehicle speed signal to the 8-pulse signal, and outputs the vehi-
cle speed signal (8-pulse) to combination meter.

Combination meter uses the vehicle speed signal (8-pulse) to calculate the mileage, and displays it.
How to Change The Display For Odo/trip Meter
Switch modes with following procedure.

When trip transfer switch is pressed, trip meter display changes.

If trip reset switch is pressed for 1 second or more while “trip A”
is displayed, only “trip A” is reset.
NOTE:
The record of the odo meter is kept even if the battery cable is dis-
connected. The record of the trip meter is erased when the battery
cable is disconnected.
SKIB8760E
SKIA4817E

DI-8
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
COMBINATION METER ILLUMINATION CONTROL
Daytime Mode
When ignition switch is turned ON, combination meter illumination is turned ON by unified meter control unit.
Nighttime Mode

Unified meter control unit is transferred to nighttime mode, with ignition switch turned ON and position
light request signal from BCM with CAN communication.

When nighttime mode, illumination control switch illumination
turns ON by unified meter control unit. Each illumination is con-
trolled by unified meter control unit.

Each illumination can be adjusted to 16 step by illumination con-
trol switch in nighttime mode.
NOTE:
For further details of illumination circuit, refer to LT- 1 8 6 , "
ILLUMINA-
TION" .
FAIL-SAF E
Combination meter performs fail-safe operation when unified meter and A/C amp. communication is malfunc-
tioning.
SKIA4795E
Function Fail-safe operation
Speedometer
Return to zero.
Tachometer
Fuel gauge
Water temperature gauge
Illumination control Combination meter illumination Change to nighttime mode.
Odo/trip meter Integrate in response to 8-pulse input.
A/T position indicator The display turns OFF.
Warning buzzer The warning buzzer turns OFF.
Warning lamp/indicator lamp ABS warning lamp
The lamp turns ON.
VDC OFF indicator
SLIP indicator
Brake warning lamp
Low tire pressure warning lamp
AWD warning lamp
Door warning lamp
The lamp turns OFF.
SET indicator lamp
CRUISE indicator lamp
ICC warning lamp
A/T CHECK warning lamp
Oil pressure warning lamp
Snow mode indicator lamp
Turn signal indicator
Malfunction indicator lamp
High beam indicator
Key warning lamp
Run-flat tire warning lamp

COMBINATION METERS DI-9
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Revision: 2006 July 2007 FX35/FX45
Component Parts and Harness Connector LocationNKS002ZD
SKIB8474E

DI-10
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
Arrangement of Combination MeterNKS002ZE
PKID0683E

COMBINATION METERS DI-11
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Revision: 2006 July 2007 FX35/FX45
Circuit DiagramNKS002ZF
TKWM5121E

DI-12
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
Wiring Diagram — METER —NKS002ZG
TKWM4342E

COMBINATION METERS DI-13
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Revision: 2006 July 2007 FX35/FX45
TKWM4343E

DI-14
COMBINATION METERS
Revision: 2006 July 2007 FX35/FX45
Terminals and Reference Value for Combination MeterNKS002ZH
Terminal
No. Wire
color Item Condition
Reference value
Ignition
switch Operation or condition
1G Vehicle speed signal
(8-pulse) ON Speedometer operated
[When vehicle speed is
approx. 40 km/h (25 MPH)] NOTE:
Maximum voltage may be 5 V due
to specifications (connected units).
4 LG ACC power supply ACC — Battery voltage
5 B Ground ON — Approx. 0 V
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7 G/Y Ignition power supply ON — Battery voltage
8 R/W Battery power supply OFF — Battery voltage
13 L/B TX communication line (To
unified meter and A/C amp.) ON —
14 PU RX communication line (From
unified meter and A/C amp.) ON —
15 B Ground ON — Approx. 0 V
25 — Illumination control switch (–) OFF Illumination control switch (–)
is pressed. Approx. 0 V
Illumination control switch (–)
is released. Approx. 5 V
26 — Illumination control switch (+) OFF Illumination control switch (+)
is pressed. Approx. 0 V
Illumination control switch (+)
is released. Approx. 5 V
27 — Odo/trip meter and illumina-
tion control switch ground OFF — Approx. 0 V
35 — Trip reset switch OFF Trip reset switch is pressed Approx. 0 V
Trip reset switch is released Approx. 5 V
36 — Trip transfer switch OFF Trip transfer switch is pressed Approx. 0 V
Trip transfer switch is released Approx. 5 V
PKIA1935E
SKIA3361E
SKIA3362E