1. DTC P0117 description
The engine coolant temperature sensor is installed near the thermostat housing. The engine coolant temperature sensor is a variable resistor and measures the temperature of the engine coolant. This sensor has a signal circuit and a low reference circuit. The ECM supplies 5 V to the signal circuit, and connects the ground to the low reference circuit. The sensor resistance is high when the engine coolant temperature is low, and the sensor resistance decreases as the engine coolant temperature increases. The ECM detects a high voltage when the sensor resistance is high, and a low voltage when the sensor resistance is low. If the ECM detects an excessively low signal voltage, the DTC is set.
2. Condition for setting DTC P0117
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition switch is ON.
- DTCs P060B and P0697 are not set.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P060B Internal Control Module A/D Processing Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0697 Sensor Reference Voltage 3 Circuit".
Condition for setting the DTC
- The ECM detects that the engine coolant temperature sensor signal voltage is 0.1 V or less for 3 seconds.
3. Action taken when DTC P0117 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM inhibits the EGR control.
- The ECM inhibits the turbocharger control.
- The ECM inhibits the cruise control.
- The ECM assumes a default engine coolant temperature value.
4. Condition for clearing DTC P0117
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".