2007 NISSAN 350Z ABS

DI-4
COMBINATION METERS
Revision: 2006 November2007 350Z
COMBINATION METERSPFP:24814
System DescriptionNKS0005S
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 a
signals 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 and A/T indicator 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-44, "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 24.
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 23.
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 14.
Ground is supplied

to combination meter terminals 10, 11 and 12

through body grounds M30 and M66.
SPEEDOMETER

VDC/TCS/ABS control unit [with VDC] or ABS actuator and electric unit (control unit) [without VDC] pro-
vides a vehicle speed signal to the unified meter and A/C amp. with CAN communication line.

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).
PKIC4371E

COMBINATION METERS
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Revision: 2006 November2007 350Z
TACHOMETER

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

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

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

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.
FUEL GAUGE

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 fuel level sensor unit and fuel pump (main) terminals 5 and 2, and
–through fuel level sensor unit (sub) terminals 2 and 1
–to unified meter and A/C amp. terminal 28.

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 fuel level signal.
ODO/TRIP METER

VDC/TCS/ABS control unit [with VDC] or ABS actuator and electric unit (control unit) [without VDC] pro-
vides a vehicle speed signal to the unified meter and A/C amp. with CAN communication line.

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.
PKIB7631E
PKIB7632E

COMBINATION METERS
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SHIFT-UP INDICATOR

Shift-up indicator can be used when shifting up at a constant
engine speed from any gear while driving. It becomes a guide
for shift-up timing.

Shift-up indicator flashes approximately 500 rpm before reach-
ing the engine speed set. It illuminates when reaching the
engine speed set.
Shift-up engine speed can be set by the shift-up indicator setting
mode on trip computer. Refer to DI-29, "
Shift-up Indicator Setting
Mode" .
NOTE:

There may be a time lag between the shift-up indicator illumina-
tion and the tachometer indication.

If the battery cable is disconnected, the set engine speed becomes 7,000 rpm.
FA I L - S A F E
Combination meter performs fail-safe operation when unified meter and A/C amp. communication is malunc-
tion.
PKIA2097E
Function Fail-safe operation
Speedometer Return to zero
Tachometer
Reset to zero 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 indicator The display turns OFF
Meter buzzer The meter buzzer turns OFF
Warning lamp/indicator lampABS warning lamp
The lamp turns ON VDC OFF indicator lamp
TCS OFF indicator lamp
SLIP indicator lamp
Brake warning lamp
Tire pressure warning lamp
A/T CHECK lamp
The lamp turns OFF Oil pressure warning lamp
Door warning lamp
High beam indicator lamp
Turn signal indicator lamp
Malfunction indicator lamp
CRUISE indicator lamp
SET indicator lamp

DI-18
COMBINATION METERS
Revision: 2006 November2007 350Z
Vehicle Speed Signal InspectionNKS00065
Symptom: Indication is irregular for the Speedometer and odo/trip meter.
1. CHECK VDC/TCS/ABS CONTROL UNIT OR ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
Perform the following units self-diagnosis.

VDC/TCS/ABS control unit [with VDC]. Refer to BRC-96, "CONSULT-III Functions (ABS)" .

ABS actuator and electric unit (control unit) [without VDC (with TCS)]. Refer to BRC-52, "CONSULT-III
MAIN FUNCTION" .

ABS actuator and electric unit (control unit) [without VDC (without TCS)]. Refer to BRC-19, "CONSULT-III
MAIN FUNCTION" .
Self
-diagnostic results
No malfunction detected >> GO TO 2.
Malfunction detected >> Check applicable parts, and repair or replace corresponding parts.
2. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1. Start engine and drive vehicle at approximately 40 km/h (25 MPH).
2. Check voltage signal between unified meter and A/C amp. har-
ness connector M49 terminal 26 and ground.
OK or NG
OK >> GO TO 3.
NG >>

If monitor indicates “0 V” constantly, repair or replace malfunctioning parts after checking each
unit inputting vehicle speed signal (8 pulse), harness and connector between each unit and uni-
fied meter and A/C amp.

If monitor indicates “5 V” or “12 V” constantly, replace unified meter and A/C amp.
3. CHECK CONTINUITY BETWEEN COMBINATION METER AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector
M19 terminal 20 and unified meter and A/C amp. harness con-
nector M49 terminal 26.
OK or NG
OK >> Replace combination meter.
NG >> Repair harness or connector.26 – Ground:NOTE:
Maximum voltage may
be 5 V due to specifica-
tions (connected units).
SKIB0338E
PKIA1935E
20 – 26 : Continuity should exist.
SKIB0339E

DI-24
COMBINATION METERS
Revision: 2006 November2007 350Z
Removal and Installation for Combination MeterNKS0006D
REMOVAL
1. Remove instrument driver panel lower. Refer to IP-10, "INSTRU-
MENT PANEL ASSEMBLY" .
2. Remove steering column lower cover. Refer to IP-10, "
INSTRU-
MENT PANEL ASSEMBLY"
3. Remove bolts (4) and remove column upper cover and combina-
tion meter assembly. Refer to IP-10, "
INSTRUMENT PANEL
ASSEMBLY" .
4. Remove screws (6) and remove combination meter.
INSTALLATION
Installation is the reverse order of removal.
Disassembly and Assembly for Combination MeterNKS0006E
DISASSEMBLY
1. Remove screws (6) to separate steering column upper cover.
2. Disengage tabs (2) to separate front finisher.
3. Disengage tabs (8) to separate rear finisher.
PKIA1760E
1. Front finisher 2. Front cover 3. Unified meter control unit
4. Rear cover 5. Screws 6. Rear finisher
7. Upper cover 8. Illumination control switch 9. Trip computer switch
10. Steering column upper cover
PKIA1761E

COMBINATION METERS
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Revision: 2006 November2007 350Z
4. Disconnect illumination control switch connector and trip com-
puter switch connector.
5. Remove screws (2) and remove rear cover.
6. Disengage tabs (4) to separate upper cover from rear cover.
7. Remove illumination control switch.
8. Remove trip computer switch.
9. Disengage tabs (7) to separate front cover.
ASSEMBLY
Assembly is the reverse order of disassembly.
SKIA3273E
SKIA3274E

DI-28
TRIPLE METERS
Revision: 2006 November2007 350Z
DTE (Distance to Empty)

Unified meter and A/C amp. uses following signals to calculate the DTE signal.
–Fuel remaining signal (from the fuel level sensor unit)
–Fuel consumption signal (from ECM)
–Vehicle speed signal [from VDC/TCS/ABS control unit or ABS actuator and electric unit (control unit)]

Trip computer receives DTE signal from the unified meter and A/C amp. with communication line.

Trip computer displays the DTE according to DTE signal.

The indication is refreshed every 30 seconds.
NOTE:

When fuel remaining is less than approx. 10 (10-5/8 US qt, 8-3/4 Imp qt), the display shows “dte” blink
as a warning. And the fuel remaining is less than approx. 8 (8-1/2 US qt, 7 Imp qt), the display shows “-
---”.

When the battery cable is disconnected and reconnected, the display shows “----” for 30 seconds.
Average Fuel Consumption

Unified meter and A/C amp. uses following signals to calculate the average fuel consumption signal.
–Fuel consumption signal (from ECM)
–Vehicle speed signal [from VDC/TCS/ABS control unit or ABS actuator and electric unit (control unit)]

Trip computer receives the average fuel consumption signal from the unified meter and A/C amp. with
communication line.

Trip computer displays the average fuel consumption according to the average fuel consumption signal.

The indication is refreshed every 30 seconds.
NOTE:
If the average fuel consumption is reset, the average vehicle speed is reset at the same time. While driving
about 1/3 miles (500 m) or for 80 seconds after resetting, the display shows “----”.
Average Vehicle Speed

Unified meter and A/C amp. uses following signals to calculate the average vehicle speed signal.
–Trip distance signal
–Trip time signal

Trip computer receives the average vehicle speed signal from the unified meter and A/C amp. with com-
munication line.

Trip computer displays the average vehicle speed according the average vehicle speed signal.

The indication shows refreshed every 30 seconds.
NOTE:
If the average vehicle speed is reset, the average fuel consumption will be reset at the same time. After reset-
ting, the display will show “----” for 30 seconds.
Trip Time

Unified meter and A/C amp. calculates the time during ignition switch ON.

Trip computer receives the trip time signal from the unified meter and A/C amp. with communication line.

Trip computer displays trip time according to the trip time signal.
NOTE:
If trip time is reset, trip distance is reset at the same time.
Trip Distance

Unified meter and A/C amp. uses following signals to calculate the average fuel consumption signal.
–Trip time signal
–Vehicle speed signal from VDC/TCS/ABS control unit or ABS actuator and electric unit (control unit)

Trip computer receives the trip distance signal from the unified meter and A/C amp. with communication
line.

Trip computer displays the trip distance according to the trip distance signal.
NOTE:
If trip distance is reset, trip time will be reset at the same time.

TRIPLE METERS
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Disassembly and Assembly for Triple MetersNKS0006W
DISASSEMBLY
1. Remove screws (2), and remove front cover.
2. Disengage tabs (6) to separate upper housing.
ASSEMBLY
Assembly is the reverse order of disassembly.
1. Screw 2. Front cover 3. Upper housing
4. Triple meter
PKIA1763E