The fuel level sending unit is a variable resistor called a potentiometer. The potentiometer is controlled by a float that moves up or down depending on the fuel level in the tank. The potentiometer has an operating range of 80 ohms to 290 ohms, 80 ohms when the tank is full to 290 ohms when the tank is empty. There are two wires connected to the potentiometer, one is a +5 volt direct current (Vdc) source provided by the Powertrain Control Unit (PCM) and the other is a signal ground, also connected to the PCM. As the resistance of the potentiometer changes the electrical current flow in the circuit changes. If there is no current flow because the circuit is open (broken wire) the voltage at the PCM input sensor remains at +5Vdc. The PCM will detect this and set DTC P0463.
The two wires from the potentiometer are connected to the PCM using five electrical connectors.
Fuel Pump assembly at the fuel tank (F-1)
PCM (E-22)
H-5 is a 16 Pin Green Connector on the LH inner fender.
H-15 is 20 Pin Blue Connector behind the LH kick panel
H-25 is a 13 Pin White Connector under the LH (driver) seat
See if you can locate the H-15 connector.
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