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Symptom: P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH When Monitored and Set Condition: P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH When Monitored: With the ignition on. Battery voltage greater than 10 volts. Set Condition: The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM is greater than 4.96 volts for more than 2.6 seconds. One Trip Fault. POSSIBLE CAUSES ECT SENSOR VOLTAGE ABOVE 4.96 VOLTS ECT SENSOR (K2) ECT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE (K2) ECT SIGNAL CIRCUIT OPEN (K900) SENSOR GROUND CIRCUIT OPEN PCM TEST ACTION APPLICABILITY 1 Ignition on, engine not running. t, read the ECT Sensor voltage. Is the voltage above 4.96 volts? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION Symptom (Diagnos- tic Procedure). 2 Turn the ignition off. t, read the ECT Sensor voltage. Is the voltage below 1.0 volt? All Yes → Replace the ECT Sensor. Perform POWERTRAIN VERIFICATION TEST VER - 5. No → Go To 3 NOTE: Remove the jumper wire before continuing. 73 DRIVEABILITY - NGC |