P0116

DTC PO116 Engine Coolant Temp. 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. sensor circuit malfunction
If the ECM detects the diagnostic trouble code PO115, it operates the fail safe function in which the engine coolant temp. is assumed to be 8O°C (176°F).

DETECTING CONDITION





WIRING DIAGRAM

Engine Coolant Temp. Sensor Circuit:

INSPECTION PROCEDURE
HINT: If diagnostic trouble codes "P0115" (engine coolant temp. circuit malfunction) and "P0116" (engine coolant temp. circuit range/performance) are output simultaneously, engine coolant temp. sensor circuit may be open. Perform troubleshooting of diagnostic trouble code PO115 first.