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EC-166 < DTC/CIRCUIT DIAGNOSIS > [MR18DE] P0117, P0118 ECT SENSOR P0117, P0118 ECT SENSOR Description INFOID:0000000009947286 The engine coolant temperature sensor is used to detect the engine <Reference data> *: These data are reference values and are measured between ECM terminal 38 DTC Logic INFOID:0000000009947287 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 5 seconds. 2. Check DTC. Is DTC detected? YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009947288 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. SEF594K Engine coolant temperature [ ° C ( ° F)] Voltage* (V) Resistance (k Ω ) –10 (14) 4.4 7.0 - 11.4 20 (68) 3.5 2.37 - 2.63 50 (122) 2.2 0.68 - 1.00 90 (194) 0.9 0.236 - 0.260 SEF012P DTC No. Trouble diagnosis name 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 |