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EC-198 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P0117, P0118 ECT SENSOR P0117, P0118 ECT SENSOR DTC Logic INFOID:0000000009020713 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 5 seconds. 2. Check DTC. YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009020714 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to Ground Inspection in GI-41, "Intermittent Incident" Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK ECT SENSOR POWER SUPPLY CIRCUIT 1. Disconnect engine coolant temperature (ECT) sensor harness connector. 2. Turn ignition switch ON. 3. Check the voltage between ECT sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between ECT sensor harness connector and ECM harness connector. DTC No. Trouble diagnosis content DTC detecting condition Possible cause P0117 Engine coolant temperature An excessively low voltage from the sensor • Harness or connectors (The sensor circuit is open or shorted.) • Engine coolant temperature sensor P0118 Engine coolant temperature An excessively high voltage from the sensor ECT sensor Ground Voltage Connector Terminal F6 1 Ground Approx. 5 V |