Dtc 117-Ect Low Voltage; Dtc 118-Ect High Voltage; Ect (Engine Coolant Temperature) (Dtc 116, 117, 118, 217) - Kubota WG1605-E3 Diagnostic Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM

(5) ECT (Engine Coolant Temperature) (DTC 116, 117, 118, 217)

DTC 116-ECT Higher Than Expected Stage 1
• Hardware: Engine Coolant Temperature Sensor
• Enabling Conditions: Engine Running above 500 min
• Set Conditions: Engine Coolant Temperature reading or estimate greater than the stage 1 limit (110 °C (230 °F))
for longer than 30 seconds
• Corrective Action(s): Illuminate MIL, active power derate 1
• Non-emissions related fault
• Possible Causes: Overheating engine, sensor out of calibration, signal wire partially shorted to ground or faulty
ECM

DTC 117-ECT Low Voltage

• Hardware: Engine Coolant Temperature Sensor
• Enabling Conditions: Engine Running
• Set Conditions: ECT sensor voltage less than 0.100 V for longer than 1 second
• Corrective Action(s): Illuminate MIL, disable fuel adaptive learn while code is active
• Emissions related fault
• Possible Causes: Faulty ECM (no voltage on signal wire), signal wire shorted to ground or sensor internally
shorted

DTC 118-ECT High Voltage

• Hardware: Engine Coolant Temperature Sensor
• Enabling Conditions: Engine Running
• Set Condition: ECT sensor voltage greater than 4.90 V for longer than 1 second
• Corrective Action(s): Turn on MIL, disable fuel adaptive learn while code is active.
• Emissions related fault
• Possible Causes: Signal wire shorted to 12.0 V, signal wire open, sensor open internally or open 5 Vrtn1 (sensor
ground)
DTC 217-ECT Higher Than Expected Stage 2
• Hardware: Engine Coolant Temperature Sensor
• Enabling Conditions: Engine Running above 500 min
• Set Conditions: Engine Coolant Temperature reading or estimate greater than the stage 1 limit (120 °C (248 °F))
for longer than 10 seconds
• Corrective Action(s): Illuminate MIL, active power derate 2
• Emissions related fault
• Possible Causes: Overheating engine, sensor out of calibration, signal wire partially shorted to ground or faulty
ECM
-1
(rpm)
-1
(rpm)
1-144
ECM SYSTEM
KiSC issued 12, 2016 A