RAM 1500 Van V8-5.2L VIN Y (1999)
Fuel Level Sensor: Description and Operation
FUEL LEVEL SENSOR - PCM INPUT
The Powertrain Control Module (PCM) supplies power to the fuel level sensor (fuel gauge sending unit). The fuel level sensor will then return a
signal to the PCM to indicate fuel level. The purpose of this feature is to prevent a false setting of misfire and fuel system monitor trouble codes.
This is if the fuel level is less than approximately 15 percent, or, if equipped with a Leak Detection Pump (LDP), more than approximately 85
percent of its rated capacity. This input is also used to send a signal to the PCM for fuel gauge operation via the CCD or J1850 bus circuits.