Caliber L4-2.4L (2009)
Fuel Gauge Sender: Description and Operation
Fuel Pump Module - Operation
OPERATION - FUEL PUMP MODULE
An electric fuel pump is located within the fuel pump module. The electric fuel pump is a positive displacement, immersible pump with a permanent
magnet electric motor capable of creating 860 kPa (125 psi) of operating pressure. The fuel pressure regulator limits fuel pressure to 400 kPa (58 psi).
The fuel gauge is controlled by the instrument cluster circuit board based upon cluster programming and a hard wired input received by the cluster
from the fuel level sending unit on the module in the fuel tank.
The instrument cluster continually monitors the fuel tank sending unit to determine the level of fuel in the fuel tank. This information is available to
other vehicle control modules via the Controller Area Network (CAN) data bus. Fuel gauge diagnosis is conducted as part ofthe instrument cluster
circuitry.
