Troubleshooting

DTC P0116 - Engine Coolant Temperature Circuit Range / Performance Problem

CIRCUIT DESCRIPTION
A thermistor built into the engine coolant temperature sensor changes the resistance value according to the engine coolant temperature.
The structure of the sensor and connection to the ECM is the same as in the intake air temp. circuit.
If the ECM detects the DTC P0115, it operates the fail safe function in which the engine coolant temp. is assumed to be 50°C (176°F).





DETECTING CONDITION AND TROUBLE AREA





WIRING DIAGRAM





INSPECTION PROCEDURE