AVERAGE FUEL ECONOMY DISPLAY

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Purpose

•  The average fuel economy display notifies the driver of the average fuel economy.

Function

•  The body control module (BCM) calculates the average fuel economy based on the following signals and sends an average fuel economy signal to the instrument cluster.

Signal name

Sending module/part name

Communication method
Fuel gauge sender unit voltage signal
Electrical supply unit (ESU)
HS-CAN
Fuel injection amount signal
PCM
Vehicle speed signal
Electronically controlled brake unit
Traveled distance signal
Body control module (BCM)
Not applicable

•  The body control module (BCM) calculates the average fuel economy based on the traveled distance and fuel consumption after connecting the battery or from resetting the average fuel economy. In addition, the calculation results are updated every approx. 30 s.
•  If the TRIP switch is pressed and held while the average fuel economy is displayed, the average fuel economy (cumulative fuel economy data and cumulative traveled distance data) is reset.
•  During the approx. 30 s period after the data has been reset, [---km/L] is displayed.

Structure/Construction

•  The average fuel economy display is indicated on the multi-information display in the instrument cluster.
•  The average fuel economy display can be changed to a gauge display or a numerical value display. For details on personalization features, refer to [PERSONALIZATION FEATURES] in the workshop manual.
•  The average fuel economy display is also indicated as a red arrow on the instantaneous fuel economy display.
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Operation

1.  When the body control module (BCM) receives (1) the fuel gauge sender unit voltage signal from the electrical supply unit (ESU), the fuel injection amount signal from the PCM, and the vehicle speed signal from the electronically controlled brake unit via CAN communication while the ignition is switched ON (engine off or on), it calculates the average fuel economy based on each signal and the traveled distance signal.

2.  The body control module (BCM) sends (2) the average fuel economy signal to the instrument cluster based on the calculated average fuel economy.

3.  The instrument cluster displays (3) the average fuel economy on the multi-information display based on the average fuel economy signal.

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