TRIP COMPUTER INFORMATION SYSTEM
id092200018000
Outline
• The trip computer is a system which displays the instantaneous fuel economy, average fuel economy, remaining distance to empty, average vehicle speed (without multi-information display), direction of vehicle travel (with multi-information display (with travel direction display)), and the vehicle speed alarm (with vehicle speed alarm).
Functions
• The instrument cluster controls the trip computer system based on the following signals.
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Signal name
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Sending module/part name
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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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Start stop unit
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Orientation signal
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Connectivity master unit (CMU)
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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
• 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] or [--- mpg] is displayed when the vehicle speed decreases to
4.24 km/h {2.63 mph} or less.
Average fuel economy calculation function
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Without multi-information display
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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
• 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.
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With multi-information display
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• The instrument cluster calculates the average fuel economy based on traveled distance and fuel consumption after connecting the battery or after resetting the tripmeter. In addition, the calculation results are updated every minute.
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― After connecting battery: Each average fuel economy for tripmeter A and B
― After resetting tripmeter: Average fuel economy for reset tripmeter (A or B)
Average fuel economy formula
• The instrument cluster calculates the average fuel economy for each tripmeter A and B.
• The average fuel economy switches in conjunction with the tripmeter A and B indications each time the INFO button is pressed.
• 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 of tripmeter A 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
• 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)/5 L {1 US gal, 1 Imp gal} (with multi-information display).
Average vehicle speed calculation function (without multi-information display)
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• The instrument cluster calculates the average vehicle speed based on the cumulative traveled distance and cumulative traveled time from connecting the battery or resetting the average vehicle speed. In addition, the calculation results are updated
every 10 s.
Average vehicle speed formula
• If the INFO button is pressed for 1.5 s or more while the average vehicle speed is displayed, the average vehicle speed (cumulative traveled distance and cumulative traveled time data) is reset.
• During the 1 min period after the data has been reset,[--- km/h] or [--- mph] is displayed.
Travel direction display function (with multi-information display (with travel direction display))
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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).
Vehicle speed alarm function (with vehicle speed alarm)
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• The instrument cluster compares the current vehicle speed with the speed set by the user and if the current vehicle speed exceeds the set vehicle speed, the alarm is triggered.
• The set vehicle speed can be set in 10 km/h or 10 mph increments between 30 km/h—230 km/h or 20 mph—140 mph.
• If the vehicle speed alarm is not set, <--- km/h> or <--- mph> is displayed.
• The instrument cluster outputs a warning display and warning sound when the current vehicle speed is the same as the set vehicle speed.
• The instrument cluster switches the warning display back to the screen prior to the warning display when the current vehicle speed is -5 km/h {-3 mph} or less than the set vehicle speed.
• The alarm sound pattern is as shown in the figure.
Structural View
System Wiring Diagram
Operation
1. When the instrument cluster receives (1) the vehicle speed signal, fuel injection amount signal, and traveled distance signal from the PCM, steering switch operation signal from the start stop unit, and an orientation signal from the connectivity master unit (CMU) (with multi-information display) via CAN communication while the ignition is switched ON (engine on), it calculates (2) the instantaneous fuel economy, average fuel economy, remaining distance to empty, and the average vehicle speed (without multi-information display).
2. The instrument cluster displays (3) the calculation results in the LCD (without multi-information display)/multi-information display (with multi-information display).
Trip computer display switching operation
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Without multi-information display
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• The instrument cluster switches the trip computer display content as follows based on the steering switch operation signal from the start stop unit.
Display screen table
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With multi-information display
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• For details on the trip computer display switching operation, refer to [MULTI-INFORMATION DISPLAY]. (See
MULTI-INFORMATION DISPLAY.)
Display screen table
Data reset
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Caution
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• Previously stored data cannot be recovered after it is reset. When resetting data, explain the reset items to the customer and reset the data after obtaining their consensus.
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• The following information can be reset all at once. Refer to the Workshop Manual [INSTRUMENT CLUSTER DATA RESET PROCEDURE] for the resetting procedure.
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― Average fuel economy
― Average vehicle speed
― TRIP value
Fail-safe
• Not applicable
