LOW FUEL WARNING LIGHT

id092200023000


Purpose

•  The low fuel warning light warns the driver that the remaining fuel level is low.

Function

•  The instrument cluster calculates the remaining fuel amount based on the following signals, and if the calculated remaining fuel amount is approx. 9 L {2 US gal, 2 Imp gal} (fuel gauge indicates remaining 2 segments), it turns the low fuel warning light on.

Signal name

Sending module/part name

Communication method
Fuel gauge sender unit voltage signal
BCM
HS-CAN
Fuel injection amount signal
PCM
Vehicle speed signal

Note
•  The PCM performs run dry prevention (RDP) control according to the fuel consumption after the low fuel warning light turned on. For details on the run dry prevention (RDP) control, refer to [RUN DRY PREVENTION (RDP) CONTROL]. (SKYACTIV-D 1.5) (See RUN DRY PREVENTION (RDP) CONTROL [SKYACTIV-D 1.5].)

Construction

•  The instrument cluster microcomputer controls the turning on/off of the low fuel warning light based on the remaining fuel amount calculation that is calculated by the instrument cluster.
•  The low fuel warning light is built into the instrument cluster.
am2zzn00002886

Operation

1.  When the ignition is switched ON (engine off or on), the instrument cluster receives (1) a fuel gauge sender unit voltage signal from the BCM, and a fuel injection amount and vehicle speed signals from the PCM via CAN communication.

2.  The instrument cluster turn the transistor on (2) if the remaining fuel amount calculated based on each signal is approx. 9 L {2 US gal, 2 Imp gal}.

3.  When the transistor turns on, a ground circuit with the low fuel warning light is established and the low fuel warning light turns on (3).

am2zzn00002887

Fail-safe

•  Not applicable