3. DTC: P0117, Engine Coolant Temperature Sensor Temperature Too Low (see Table 1-16) Table 1-16 4. DTC: P0118, Engine Coolant Temperature Sensor Temperature Too High (see Table 1-17) Table 1-17 47 S/N Operation Test Results Actions 1 Connect the diagnostic instrument and adapter, and turn the ignition switch to ON. Next step 2 Check the “coolant temperature” as per the data flow. Does it match with the temperature of the engine (related to the temperature of the engine at that moment)? Note: If the temperature is often -40℃, open circuit may occur. Yes Go to step 6 No Next step 3 Disconnect the coolant temperature sensor from the harness.
Measure the resistance between pin 1# and pin 2# of the sensor with a multimeter. Does the resistance match with its temperature (refer to relevant part of the manual)? Yes Next step No Replace sensor 4 Check for open circuit or short to the power supply between pin 39#, 35# of the ECU and the pin 1#, 2# of the sensor with a multimeter. Yes Repair or replace harness No Next step 5 Start the engine, and keep idle speed. Check the “coolant temperature” on the diagnostic instrument. At this moment, the temperature will increase with the rise of the engine coolant temperature.
Yes Diagnosis help No Replace sensor S/N Operation Test Results Actions 1 Connect the diagnostic instrument and adapter, and turn the ignition switch to ON. Next step 2 Check the “coolant temperature” as per the data flow. Does it match with the temperature of the engine (related to the temperature of the engine at that moment)? Note: If the temperature is often -40℃, open circuit may occur. Yes Go to step 6 No Next step 3 Disconnect the coolant temperature sensor from the harness. Measure the resistance between pin 1# and pin 2# of the sensor with a multimeter. Does the resistance match with its temperature (refer to relevant part of the manual)?
Yes Next step No Replace sensor 4 Disconnect the coolant temperature sensor from the harness. Measure the voltage between pin 1# and pin 2# with a multimeter. Is the voltage about 5V? Yes Go to step 6 No Next step 5 Check for short to ground between pin 39#, 35# of the ECU and the pin 1#, 2# of the sensor with a multimeter. Yes Repair or replace harness No Next step 6 Start the engine, and keep idle speed. Check the “coolant temperature” on the diagnostic instrument. At this moment, the temperature will increase with the rise of the engine coolant temperature. Yes Diagnosis help No Replace sensor