INFINITI FX35 2008 Service Manual

COMBINATION METERSDI-5
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COMBINATION METERS
System DescriptionINFOID:0000000001328433
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 comb ination 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, A/T indicator and ICC system disp lay 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-26, "System Description" 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.
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 s peed signal to the 8-pulse signal, and outputs the vehicle
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.
SKIB7332E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DI-6
< SERVICE INFORMATION >
COMBINATION METERS
 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 communication.
 Unified meter and A/C amp. transmits engine coolant temperature signal to combination meter with commu-
nication line.
 Combination meter indicates the engine coolant temper ature according to engine coolant temperature sig-
nal.
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) provi des a vehicle speed signal to the unified meter and A/C
amp. with CAN communication.
 Unified meter and A/C amp. converts the vehicle s peed signal to the 8-pulse signal, and outputs the vehicle
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
PKIB7631E
PKIB7632E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

COMBINATION METERSDI-7
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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.
COMBINATION METER ILLUMINATION CONTROL
Daytime Mode
When ignition switch is turned ON, combination meter il lumination is turned ON by unified meter control unit.
Nighttime Mode
 Unified meter control unit is transferred to nighttime mode, with ignitio\
n switch turned ON and position light
request signal from BCM with CAN communication.
 When nighttime mode, illumination c ontrol switch illumination turns
ON by unified meter control unit. Each illumination is controlled by
unified meter control unit.
 Each illumination can be adjusted to 16 step by illumination control switch in nighttime mode.
NOTE:
For further details of illumination circuit, refer to LT-169, "
System
Description".
FA I L - S A F E
Combination meter performs fail-safe operation when unified meter and A/C amp. communication is malfunc-
tioning.
SKIB8760E
SKIA4817E
SKIA4795E
Function Fail-safe operation
Speedometer
Return to zero.
Tachometer
Fuel gauge
Water temperature gauge
Illumination control Combination meter illumination Change to nighttime mode.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DI-8
< SERVICE INFORMATION >
COMBINATION METERS
Component Parts and Harn ess Connector Location
INFOID:0000000001328434
Odo/trip meter Integrate in response to 8-pulse input.
A/T 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
Function Fail-safe operation
SKIB8474E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

COMBINATION METERSDI-9
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Arrangement of Combination MeterINFOID:0000000001328435
PKID0683E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DI-10
< SERVICE INFORMATION >
COMBINATION METERS
Circuit Diagram
INFOID:0000000001328436
TKWM5121E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

COMBINATION METERSDI-11
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Wiring Diagram - METER -INFOID:0000000001328437
TKWM4342E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DI-12
< SERVICE INFORMATION >
COMBINATION METERS
TKWM4343E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

COMBINATION METERSDI-13
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Terminal and Reference Va lue for Combination MeterINFOID:0000000001328438
Te r m i n a l
No. Wire
color Item Condition
Reference value
Ignition
switch Operation or condition
1G Vehicle speed signal
(8-pulse)
ONSpeedometer operated
[When vehicle speed is ap-
prox. 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
6
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DI-14
< SERVICE INFORMATION >
COMBINATION METERS
Terminal and Reference Value for Unified Meter and A/C Amp
INFOID:0000000001328439
Self-Diagnosis Mode of Combination MeterINFOID:0000000001328440
SELF-DIAGNOSIS FUNCTION
 Odo/trip meter, A/T indicator and ICC system disp lay segments operation can be checked in self-diagnosis
mode.
 Meters/gauges can be checked in self-diagnosis mode.
OPERATION PROCEDURE
1. Turn ignition switch ON, and switch the odo/trip meter to “trip A” or “trip B”. NOTE:
If the self-diagnosis function is activated with the “t rip A” displayed, only “trip A” display is reset.
2. Turn ignition switch OFF.
Te r m i n a l No. Wire
color Item Condition
Reference value
Ignition
switch Operation or condition
1 L CAN-H — — —
9PU TX communication line (To
combination meter) ON —
11 P C A N - L — — —
19 L/B RX communication line (From
combination meter) ON —
21 R/W Battery power supply OFF — Battery voltage
22 W Ignition power supply ON — Battery voltage
26 G Vehicle speed signal
(8-pulse)
ONSpeedometer operated
[When vehicle speed is ap-
prox. 40 km/h (25 MPH)] NOTE:
Maximum voltage may be 5 V due to
specifications (connected units).
28 W/B Fuel level sensor signal — — Refer to
DI-21, "
Electrical Compo-
nent Inspection".
29 B Ground (For power) ON — Approx. 0 V
30 B Ground ON — Approx. 0 V
36 B/W Fuel level sensor ground ON — Approx. 0 V
46 L/W ACC power supply ACC — Battery voltage
SKIA3362E
SKIA3361E
PKIA1935E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C