RAM 3500 Truck 2WD L6-5.9L DSL Turbo (2008)
Fuel Heater: Description and Operation
Operation
OPERATION
The fuel heater is used to prevent diesel fuel from waxing during cold weather operation.
When the fuel temperature is below 45° ±8 F (7°C), the temperature sensor allows current to flow to the heater element warming the fuel. When the fuel
temperature is above 75° ±8 F (24°C), the sensor stops current flow to the heater element.
Battery voltage to operate the fuel heater element is supplied from the ignition switch and through a solid stated device in the IPM. The fuel heater
element and "solid state device in IPM" instead of "fuel heater relay" are not computer controlled.
The heater element operates on 12 volts, 300 watts at 0° F (-18° C).
