Home/Pontiac/Firebird/Pontiac Firebird IV (1993-2002)/Repair manual/Testing & Diagnostics/DTC P1115 - ECT SENSOR CIRCUIT INTERMITTENT HIGH VOLTAGE

Contents

Wiring diagrams Section: Testing & Diagnostics

Connector Terminal Identification

All sections

DTC P1115 - ECT SENSOR CIRCUIT INTERMITTENT HIGH VOLTAGE Pontiac Firebird IV

Testing & Diagnostics

Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

Circuit Description

Engine Coolant Temperature (ECT) sensor is a thermistor, that varies resistance based on temperature. As temperature of sensor increases, resistance decreases. High temperature will result in a low signal voltage. DTC will set when PCM sees an ECT sensor voltage intermittently greater than 4.8 volts.

Conditions required to set DTC are

Engine running for 3 seconds.
ECT voltage intermittently greater than 4.8 volts.