FUEL GAUGE
id092200032700
Purpose
• The fuel gauge notifies the driver of the fuel tank level.
Functions
• The instrument cluster calculates the amount of fuel in the fuel tank based on the following signals and displays the fuel gauge digital needle.
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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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Rear body control module (RBCM)
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MS-CAN
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Fuel injection amount signal
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PCM
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HS-CAN
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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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• If the fuel tank level changes by 5 L {1 US gal, 1 Imp gal}/2 L {0.5 US gal, 0.4 Imp gal}*1 (without multi-information display)/5 L {1 US gal, 1 Imp gal} (with multi-information display) or more while the vehicle is stopped, the instrument cluster determines that the vehicle is refueled and displays the fuel gauge digital needle based on the fuel gauge sender unit voltage signal from the rear body control module (RBCM).
*1 :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
Structure/Construction
• The fuel gauge is displayed in the LCD (without multi-information display)/multi-information display (with multi-information display) of the instrument cluster.
• The fuel gauge consists of 15 digital needles. (without multi-information display)
• The fuel gauge consists of 53 digital needles. (with multi-information display)
Operation
1. When the instrument cluster receives (1) a fuel gauge sender unit voltage signal from the rear body control module (RBCM) and a fuel injection amount signal and vehicle speed signal from the PCM via CAN communication while the ignition is switched ON (engine off or on), it calculates (2) the remaining fuel amount based on each signal.
2. Display/non-display (3) of the fuel gauge digital needle in the LCD (without multi-information display)/multi-information display (with multi-information display) of the instrument cluster by the instrument cluster is based on the calculated result.
Fail-safe
• Not applicable
