P0115-Engine Coolant Temperature Sensor Performance: Notes

Fig 1: Engine Coolant Temperature Sensor Circuit Schematic

Courtesy of CHRYSLER LLC

1. When Monitored  : With the engine running and no fault in the throttle valve actuator.
2. Set Condition  : LOW LIMIT: The ECT Sensor value is less than -39°C (-38°F ) for more than 1 second. HIGH LIMIT: The ECT Sensor value is more than 170°C (338°F) for more than 1 second. CLOSED LOOP TEMPERATURE NOT REACHED: The engine coolant temperature does not reach 15°C (60°F) in a predetermined time. Failure time varies from 2 to 20 minutes and is calculated from start up temperature, engine speed, and ambient temperature.

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .