Kubota WG1605-E3, Diagnostic Manual

Page: 179 / 241

ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-169
(9) Fuel Temp (Fuel Temperature Sensor) (DTC 182, 183, 187)
DTC 182-Fuel Temp (Gasoline) Low Voltage/Low Temp
• Hardware: Liquid Fuel Temperature Sensor
• Enabling Conditions: Engine Running
• Set Conditions: FT sensor voltage less than 0.050 V
OR indicated temperature below

37 °C (

35 °F) for longer
than 1 second
• Corrective Action(s): Illuminate MIL and disable fuel adaptive learn for the rest of the key cycle
• Emissions related fault (evaporative emissions)
• Possible causes:
– Voltage Low: Sensor signal wire shorted to ground, sensor shorted internally, faulty ECM
– Temperature Low: Operating in a frigid atmosphere, Sensor out of calibration, partial short to ground in signal
circuit causing circuit to indicate a very cold temp (below

37 °C (

35 °F)) but not high enough to set a high
voltage fault
The Fuel Temperature sensor is a thermistor (temperature sensitive resistor) integrated into the fuel pressure
located in the fuel supply line between the fuel pump and the fuel rail. It is used to monitor the fuel temperature exiting
the fuel pump to set a fault if the fuel temperature is too high resulting in increased fuel vapor from the fuel tank
causing excessive evaporative emissions (for emissions regulations compliance). The ECM provides a voltage
divider circuit so that when the fuel is cool, the signal reads higher voltage, and lower when warm.
This fault will set if the signal voltage is less than 0.050 V anytime that the engine is running OR the indicated
temperature from the sensor is below

37 °C (

35 °F) for longer than 1 second.
KiSC issued 12, 2016 A