2011 INFINITI QX56 Factory Service Manual

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Page 3761 of 5598

INFINITI QX56 2011 Factory Service Manual
MWI-18
< SYSTEM DESCRIPTION >
SYSTEM
When recognizing an engine start, the combination meter controls the following items for producing the effect.
Speedometer
Tachometer
Engine coolant tempera

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INFINITI QX56 2011 Factory Service Manual
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BCM transmits a meter ring illumination request signal to the illumination meter when all the following opera-
tional conditions a

Page 3763 of 5598

INFINITI QX56 2011 Factory Service Manual
MWI-20
< SYSTEM DESCRIPTION >
SYSTEM
INFORMATION DISPLAY : System Description
INFOID:0000000006221717
DESCRIPTION
The combination meter receives signals necessary for controlling the operation of t

MWI-20
< SYSTEM DESCRIPTION >
SYSTEM
INFORMATION DISPLAY : System Description
INFOID:0000000006221717
DESCRIPTION
The combination meter receives signals necessary for controlling the operation of the information display from each unit, sensor and switch.
The combination meter incorporates a trip computer t hat displays the warning/information according to the
information received from each unit, sensor and switch.
The combination meter shows the following functions on the information display.
- Odo/trip meter
- Shift position indicator
- Trip computer
- Interrupt indication
- Warning check indication
- Setting
ODO/TRIP METER
The ABS actuator and electric unit (control unit) r eads the rectangular wave signal provided by the wheel
sensor and transmits the vehicle speed signal to the combination meter via CAN communication.
The combination meter converts the vehicle speed signal received via CAN communication to mileage, and it displays the accumulated mileage on the information display.
SHIFT POSITION INDICATOR
MANUAL MODE
The combination meter receives the following signal and transmits the signal to TCM via CAN communica-tion.
TCM judges a shift position, manual mode, and manual mode information, based on a signal received from
the combination meter via CAN communication and transmi ts the following signals to the combination meter
via CAN communication.
The combination meter activates the shift position indicator, and manual mode information, based on signals received from TCM via CAN communication.
NOTE:
When receiving a manual mode shift refusal signal from TCM via CAN communication, the combination meter
blinks the shift position indicator lamp and allows the integrated buzzer to ring a beep tone. For further infor-
mation, refer to TM-54, "
SHIFT PATTERN CONTROL : System Description".
NON-MANUAL MODE
Combination meter inputs non-manual mode signal from A/T shift selector (manual mode switch), and trans-
mits the signals to TCM with CAN communication line.
TCM transmits shift position signal to combination meter with CAN communication line.
Combination meter indicates shift position when receiving shift position signal.
TRIP COMPUTER
Current Fuel Consumption
The combination meter calculates current fuel cons umption based on the following signals, and the calculated
value is displayed on the information display.
Signal name Signal path
Manual mode signal
A/T shift selector Combination meter TCM
Non-manual mode signal
Manual mode shift up signal
Manual mode shift down signal
Signal name Signal path
Shift position signal TCM Combination meter
Manual mode shift refusal signal
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >
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Current fuel consumption on the information di splay is updated approximately every 0.5 seconds.
Current fuel consumption

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Current fuel consumption on the information di splay is updated approximately every 0.5 seconds.
Current fuel consumption on the information displa y shows 0 l/100km (0 mpg) when vehicle speed is 0 km/h
(0 MPH).
Average Fuel Consumption
The combination meter calculates average fuel c onsumption based on the following signals, and the calcu-
lated value is displayed on the information display.
NOTE:
Average fuel consumption on the information display is updated approximately every 30 seconds.
Soon after a reset or when the ignition switch is turned ON right after battery removal and installation, “ −−−”
is displayed until after a travel of 30 seconds and approximately 500 m (0.31 mile).
Distance to Empty
The combination meter calculates distance to empty based on the following signals, and the calculated value
is displayed on the information display.
NOTE:
Distance to empty on the information display is updated approximately every 30 seconds.
When the ignition switch is turned from OFF to ON, “ −−−” is displayed until after a travel of approximately
500 m (0.31 mile).
The indicated values may not match each other when refueling with the ignition switch ON.
Average Vehicle Speed
The combination meter calculates average vehicle speed based on the following signals, and the calculated
value is displayed on the information display.
NOTE:
Average vehicle speed on the information disp lay is updated approximately every 30 seconds.
Soon after a reset or when the ignition switch is turned ON right after battery removal and installation, “ −−−”
is displayed until after a 30 seconds.
Travel Time
Signal name Signal path
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Fuel level sensor signal Fuel level sensor unit Combination meter
Fuel consumption monitor signal ECM Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Ignition signal —
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >
SYSTEM
The combination meter measures and displays travel time (ignition switch ON time).
Travel Distance
The combination meter calculates mileage, based on the followin

MWI-22
< SYSTEM DESCRIPTION >
SYSTEM
The combination meter measures and displays travel time (ignition switch ON time).
Travel Distance
The combination meter calculates mileage, based on the following signals and displays the mileage on the
information display.
Ambient Temperature
The combination meter corrects an indicated temperature, based on various signals.
The combination meter calculates ambient air temperature based on the following signals, and the calcu-
lated value is displayed on the information display.
Correction Process (Temperature indicated soon after the ignition switch ON) A temperature indicated soon after the ignition switch is turned ON depends on the time from the ignition switch OFF to ON and a temperatur e detected by the ambient sensor.
When any condition described below is met, an ambient sensor-detected temperature is indicated.- Time from the ignition switch OFF to ON ≥ Predetermined time
- Sensor-detected temperature < Temperat ure at the last ignition switch OFF
Correction Process (Temperature at the Ignition switch ON) A temperature indicated when the ignition switch is ON depends on a vehicle speed, an ambient sensor-
detected temperature, and traveling time.
The temperature on the information display is corrected to an am bient sensor-detected temperature when the following condition
is met.
- Ambient sensor-detected temperature < Temperature on the information display
A temperature on the information display is no t updated when the following condition is met.
- Ambient sensor-detected temperature ≥ Temperature on the information display
- Vehicle speed ≤ 20 km/h (12 MPH)
A temperature on the information display slowly rises to an ambient sensor-detected temperature when the following condition is
met.
- Ambient sensor-detected temperature ≥ Temperature on the information display
- Vehicle speed ≥ 20 km/h (12 MPH)
A temperature on the information display rapidly rises to an ambient sensor-detected temperature when the following condition
is met.
- Ambient sensor-detected temperature ≥ Temperature on the information display
- Vehicle speed ≥ 20 km/h (12 MPH)
- When driving more than set time
A/C auto amp. connection recognition
The combination meter judges the A/C auto amp. connection/disconnection, based on an A/C auto amp.
connection recognition signal to judge the presence/ absence of the ambient sensor power output.
NOTE:
After an ignition switch is turned ON, “–––” is displayed until after a 2.5 seconds.
Signal name Signal path
Ignition signal —
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Ignition signal —
Ambient sensor signal Ambient sensor Combination meter
A/C auto amp. connection recognition signal A/C auto amp. Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
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The ambient sensor input value that is displayed on “Data Monitor” of CONSULT-III is the value before the
correction. It ma

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The ambient sensor input value that is displayed on “Data Monitor” of CONSULT-III is the value before the
correction. It may not match the indica ted temperature on the information display.
After removal and installation of the battery and comb ination meter, an ambient sensor-detected tempera-
ture is indicated on the information display.
Depending on engine heat or heat on the road surfaces, an ambient temperature may be indicated higher
than actual one.
INTERRUPT INDICATION
The combination meter displays an interrupt regarding a warning, alert, and maintenance on the information
display, based on signals received from each unit and switch.
When conditions are satisfied, the normal screen swit ches to a warning screen to display an interrupt.
Door Open Warning
When all the following operating conditions are satisfied, the combination meter displays a door open warn-
ing on the information display by an interrupt.
The combination meter judges showing/hiding of “door open warning”, according to the signals below:
Parking Brake Release Warning
When all the following operating conditions are satisfi ed, the combination meter displays a parking brake
release warning on the information display by an interrupt.
The combination meter judges showing/hiding of “parki ng brake release warning”, according to the signals
below:
Low Fuel Warning
When all the following operating conditions are satisfied, the combination meter displays a low fuel warning on the information display by an interrupt.
*: With the vehicle in a horizontal position
The combination meter judges showing/hiding of “low fuel warning”, according to the signals below:
Operating condition
Ignition switch ON
Door Any door is open
Signal name Signal path
Ignition signal —
Door switch signal Door switch BCM Combination meter
Operating condition
Ignition switch ON
Parking brake Applied
Vehicle speed 7 km/h (4.3 MPH) or more
Signal name Signal path
Ignition signal —
Parking brake switch signal Parking brake switch Combination meter
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Operating condition
Ignition switch ON
Fuel remaining quantity
*Approximately 15.4 (4 US gal, 3-3/8 Imp gal) or less (including fuel remained)
Revision: 2010 May2011 QX56

Page 3767 of 5598

INFINITI QX56 2011 Factory Service Manual
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< SYSTEM DESCRIPTION >
SYSTEM
Low Washer Fluid Warning
When all the following operating conditions are satisfied, the combination meter displays a low washer fluid
warning on the information

Page 3768 of 5598

INFINITI QX56 2011 Factory Service Manual
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Tire (Maintenance) When all the following operating conditions are satisfied, the combination meter displays a tire warning on
th

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