Location of Fuel Level Sensor for 2000 Dakota 4WD V8-47L VIN N
move up, which decreases voltage. As fuel level decreases, the float and arm move down, which increases voltage. The varied voltage signal is
returned back to the PCM through the sensor return circuit. Output voltages will vary from about 0.6 volts at FULL, to about 8.6 volts at EMPTY
(Jeep models), or, about 7.0 volts at EMPTY (Dodge Truck models).
NOTE: For diagnostic purposes, this voltage can only be verified with the fuel gauge sending unit circuit closed (i.e. having all of the sending
units electrical connectors connected).
Both of the electrical circuits between the fuel gauge sending unit and the PCM are hard-wired (not multi-plexed). After the voltage signal is sent
from the resistor track, and back to the PCM, the PCM will interpret the resistance (voltage) data and send a message across the multi-plex bus
circuits to the instrument panel cluster. Here it is translated into the appropriate fuel gauge level reading. Refer to Instrument Panel for additional
information.
OBD II Emission Monitor Requirements
The PCM will monitor the voltage output sent from the resistor track on the sending unit to indicate fuel level. The purpose of this feature is to
prevent the OBD II system from recording/setting false misfire and fuel system monitor diagnostic trouble codes. The feature is activated if the
fuel level in the tank is less than approximately 15 percent of its rated capacity. If equipped with a Leak Detection Pump (EVAP system monitor),
this feature will also be activated if the fuel level in the tank is more than approximately 85 percent of its rated capacity.