Infiniti G37 Coupe. Manual — part 915
MWI-6
< FUNCTION DIAGNOSIS >
METER SYSTEM
FUNCTION DIAGNOSIS
METER SYSTEM
METER SYSTEM
METER SYSTEM : System Diagram
INFOID:0000000001606602
METER SYSTEM : System Description
INFOID:0000000001606603
COMBINATION METER
• The combination meter retrieves the information required for controlling the operations of the meters, indica-
tor lamps/warning lamps and information display from the communication signals from the unified meter and
A/C amp. and the signals from various switches and sensors.
• The combination meter incorporates a trip computer that displays warnings and messages on the informa-
tion display according to the information received from various units.
• The combination meter incorporates a buzzer function that sounds an audible alarm with the integrated
buzzer device. Refer to
WCS-5, "WARNING CHIME SYSTEM : System Description"
for further details.
• The combination meter integrates the meter circuit check function and the segment check function that
checks the information display operation.
UNIFIED METER AND A/C AMP.
• Receives information required by the combination meter from various units via CAN communication line and
transmits it to the combination meter with communication line.
• The unified meter and A/C amp. incorporates a power saving control function that reduces the power con-
sumption according to the vehicle status. Refer to
for details.
• The unified meter and A/C amp. incorporates a diagnosis function that allows the technician to perform diag-
noses with CONSULT-III.
JSNIA0608GB
MWI
METER SYSTEM
MWI-7
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Between unified meter and A/C amp. and combination meter.
IPDM E/R
• IPDM E/R reads the ON/OFF signals of the oil pressure switch and transmits the oil pressure switch signal to
the unified meter and A/C amp. via BCM with the CAN communication line.
• IPDM E/R is equipped with the diagnosis function. It can perform the operation check of oil pressure warning
lamp with the auto active test and the diagnosis with CONSULT-III.
METER CONTROL FUNCTION LIST
X: Applicable
Unit
Communication line
Input from combination meter
Output to combination meter
Unified meter
and A/C amp.
Communication line
(METER <-> AMP.)
• Parking brake switch signal
• Washer level switch signal
• Meter day/night condition signal
• Illumination control switch signal
• Refuel status signal
• Low fuel warning lamp signal
• Odo data signal
• Vehicle speed signal
• Turn indicator signal
• High beam request signal
• Front fog light request signal
• Engine speed signal
• Fuel level sensor signal
• Engine coolant temperature signal
• A/T CHECK indicator signal
• Oil pressure switch signal
• Door switch signal
• Buzzer output signal
• AFS OFF indicator lamp signal
• Tire pressure signal
• VDC OFF indicator signal
• ABS warning lamp signal
• Brake warning lamp signal
• Malfunction indicator lamp signal
• 4WAS warning lamp signal
• Master warning signal
Communication line
(LCD <-> AMP.)
• Average fuel consumption reset signal
• Travel time reset signal
• Possible driving distance reset signal
• Average vehicle speed reset signal
• Select switch signal
• Enter switch signal
• Trip A/B reset switch signal
• Ambient air temperature display signal
• Shift position signal
• Meter display signal
• Door switch signal
• Trunk switch signal
• Fuel level sensor signal
• Parking brake switch signal
• Washer level switch signal
• Charge warning signal
• Instantaneous fuel consumption display
signal
• Ambient air temperature display signal
• Average fuel consumption display signal
• Average vehicle speed display signal
• Possible driving distance display signal
• Engine speed signal
• Vehicle speed signal
System
Description
Signal source
Via unified
meter and A/C
amp.
Meter/gauge
Speedometer
Receives vehicle speed signal and indicates vehi-
cle speed.
ABS actuator and elec-
tric unit (control unit)
X
Tachometer
Receives engine speed signal and indicates en-
gine speed.
ECM
X
Fuel gauge
Receives fuel level sensor signal and indicates
fuel level.
Fuel level sensor unit
X
Water temperature
gauge
Receives engine coolant temperature signal and
indicates coolant temperature.
ECM
X
Warning lamp/
indicator lamp
Oil pressure warning
lamp
Receives oil pressure warning lamp signal and il-
luminates warning lamp.
IPDM E/R
X
Master warning
Illuminates according to warning output on infor-
mation display.
—
X
MWI-8
< FUNCTION DIAGNOSIS >
METER SYSTEM
Information
display
Door open warning
Receives door switch signals and displays warn-
ing.
BCM
X
Trunk open warning
Receives trunk lid opener switch signal and dis-
plays warning.
BCM
X
Parking brake re-
lease warning
Receives parking brake switch signal and vehicle
speed signal and displays warnings.
Parking brake switch
ABS actuator and elec-
tric unit (control unit)
X
Low fuel warning
Receives fuel gauge signal and displays warning
if fuel level decreases to 12
(3-1/8 US gal, 2-5/
8 Imp gal) or less.
Fuel level sensor unit
X
Low washer fluid
warning
Receives washer level switch signal and displays
warning.
Washer level switch
Low outside tempera-
ture warning
Monitors ambient sensor signal and displays
warning if ambient temperature decreases to 3
°
C
(37
°
F) or less. (If enabled)
Ambient sensor
X
Instantaneous fuel
consumption
Calculates instantaneous fuel consumption based
on received vehicle speed signals and fuel con-
sumption monitor signal and displays it.
ECM
X
ABS actuator and elec-
tric unit (control unit)
X
Average fuel con-
sumption
Calculates average fuel consumption in a reset-
to-reset interval based on received vehicle speed
signals and fuel consumption monitor signal and
displays it.
ECM
X
ABS actuator and elec-
tric unit (control unit)
X
Average vehicle
speed
Calculates average vehicle speed in a reset-to-re-
set interval based on received vehicle speed sig-
nals and displays it.
ABS actuator and elec-
tric unit (control unit)
X
Travel time
Displays accumulated key switch ON time from
reset to reset.
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X
Travel distance
Calculates accumulated travel distance in a reset-
to-reset interval based on received vehicle speed
signals and displays it.
ABS actuator and elec-
tric unit (control unit)
X
Possible driving dis-
tance
The unified meter and A/C amp. calculates the
possible driving distance according to the vehicle
speed signal and the fuel level sensor unit re-
ceived with CAN communication line, and trans-
mits it to the combination meter by means of
communication line.
ABS actuator and elec-
tric unit (control unit)
X
Fuel level sensor unit
X
Ambient air tempera-
ture
Corrects ambient air temperature value based on
received ambient sensor signals and displays it.
Ambient sensor
X
System
Description
Signal source
Via unified
meter and A/C
amp.
MWI
METER SYSTEM
MWI-9
< FUNCTION DIAGNOSIS >
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ARRANGEMENT OF COMBINATION METER
JSNIA0609GB
A.
U.S.A.
B.
Canada
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