TRIP COMPUTER INFORMATION SYSTEM [(US)]
TRIP COMPUTER INFORMATION SYSTEM [(US)]
SM2565496
id0922000180x1
Outline
• The trip computer is a system which displays the instantaneous fuel economy, average fuel economy, remaining distance to empty, maintenance monitor, and the direction of vehicle travel.
Functions
• The instrument cluster controls the trip computer system based on the following signals.
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Signal name |
Sending module/part name |
Communication method |
|---|---|---|
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Vehicle speed signal
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PCM
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HS-CAN
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Fuel injection amount signal
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Traveled distance signal
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Steering switch operation signal
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Instrument cluster
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Orientation signal
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Connectivity master unit (CMU)
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Fuel gauge sender unit voltage signal
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Electrical supply unit (ESU)
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Instantaneous fuel economy calculation function
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• The instrument cluster calculates the instantaneous fuel economy based on the fuel injection amount and traveled distance over the past 2 s when the vehicle speed is at the set value or more. In addition, the calculation results are updated every 2 s.
Instantaneous fuel economy formula
am6xun00002840• When there is no fuel consumption, such as during engine braking, [0.0 L/100 km] or [99.9 mpg] is displayed.• The instantaneous fuel economy is displayed when the vehicle speed reaches 7.06 km/h {4.39 mph} or more, and [— L/100 km], [— L/100 mile], or [— mpg] is displayed when the vehicle speed decreases to 4.24 km/h {2.63 mph} or less.
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Average fuel economy calculation function
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• The instrument cluster calculates the average fuel economy based on the traveled distance and fuel consumption from connecting the battery or resetting the average fuel economy. In addition, the calculation results are updated every minute.
Average fuel economy formula
am6xun00002842• When the cumulative traveled distance is 0 km {0 mile}, [99.9 L/100 km] or [0.0 mpg] is displayed.• If the INFO button is pressed for 1.5 s or more while the average fuel economy is displayed, the cumulative fuel economy and cumulative traveled distance data are reset.• If tripmeter A is reset, the average fuel economy is also reset.• During the 1 min period after the data has been reset, [— L/100 km] or [— mpg] is displayed.
Remaining travel distance calculation function
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• The instrument cluster calculates the remaining travel distance based on the instantaneous fuel economy at 0.1 km {0.06 mile} prior, cumulative fuel economy, and the fuel tank level. In addition, the calculation results are updated every 1 s.
Remaining travel distance formula
am6xun00002843• The instrument cluster displays [0 km] or [0 miles] when the fuel tank level is 6 L {2 US gal, 1 Imp gal} (without multi-information display)/ 4 L {1 US gal, 0.9 Imp gal} (with multi-information display).
Maintenance monitor function
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• The instrument cluster displays the maintenance monitor based on the orientation signal sent via CAN communication from the connectivity master unit (CMU).
Travel direction display function
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• The instrument cluster displays the direction of vehicle travel based on the orientation signal sent via CAN communication from the connectivity master unit (CMU).
Structure/Construction
Structural view
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System wiring diagram
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Operation
1. When the instrument cluster receives (1) a vehicle speed signal, fuel injection amount signal, and traveled distance signal from the PCM, a fuel gauge sender unit voltage signal from the electrical supply unit (ESU), an orientation signal from the connectivity master unit (CMU), and a steering switch operation signal from the electrical supply unit (ESU) with the ignition switched ON (engine on), it calculates (2) the instantaneous fuel economy, average fuel economy, and remaining travel distance.
2. The instrument cluster displays (3) the calculated result and the direction of travel on the multi-information display.
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Trip computer display switching operation
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• The instrument cluster switches the display content of the multi-information display as follows based on the tripmeter switch operation signal.
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Display screen table
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