FUEL GAUGE
id092200032700
Purpose
• The fuel gauge notifies the driver of the fuel tank level.
Function
• The instrument cluster calculates the amount of fuel in the fuel tank based on the following signals and displays the fuel gauge segments.
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Signal name
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Sending module/part name
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Communication method
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Fuel gauge sender unit voltage signal
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BCM
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HS-CAN
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Fuel injection amount signal
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PCM
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Vehicle speed signal
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Fuel gauge flicker prevention function
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• When the instrument cluster determines that the vehicle is being driven, it retards the response with which the calculated fuel tank level is reflected to the fuel gauge. As a result, fuel gauge flicker caused by the variation of fuel surface during driving is prevented.
Refuel determination function
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Digital speedometer type
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• If the fuel tank level changes by 5 L {1 US gal, 1 Imp gal} or 2 L {0.5 US gal, 0.4 Imp gal}*or more while the vehicle is stopped, the instrument cluster determines that the vehicle is refueled.
* :5 L {1 US gal, 1 Imp gal} when the number of fuel gauge segments is 13 or less, 2 L {0.5 US gal, 0.4 Imp gal} when the number of fuel gauge segments is 14 or more
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Analog speedometer type
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• If the fuel tank level changes by 3 L {0.8 US gal, 0.7 Imp gal} or 2 L {0.5 US gal, 0.4 Imp gal}*or more while the vehicle is stopped, the instrument cluster determines that the vehicle is refueled.
* :3 L {0.8 US gal, 0.7 Imp gal} when the number of fuel gauge segments is 14 or less, 2 L {0.5 US gal, 0.4 Imp gal} when the number of fuel gauge segments is 15 or more
Construction
• The fuel gauge is displayed in the LCD of the instrument cluster.
• The fuel gauge consists of
15 segments.
Operation
1. When the ignition is switched ON (engine off or on), the instrument cluster receives (1) the fuel gauge sender unit voltage signal from the BCM, and the fuel injection amount signal and vehicle speed signal from the PCM via CAN communication.
2. The instrument cluster calculates the fuel tank level based on each signal (2).
3. The instrument cluster displays/turns off the fuel gauge segments according to the calculation result (3).
Fail-safe
• Not applicable
