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P0197, P0198 EOT SENSOR EC-249 < COMPONENT DIAGNOSIS > [VQ37VHR] C D E F G H I J K L M A EC N P O P0197, P0198 EOT SENSOR Description INFOID:0000000001910867 The engine oil temperature sensor is used to detect the engine oil <Reference data> *: These data are reference values and are measured between ECM terminal 78 CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM’s transis- DTC Logic INFOID:0000000001734077 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- 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. Start engine and wait at least 5 seconds. SEF594K Engine oil temperature ° C ( ° F) Voltage* V Resistance k Ω –10 (14) 4.4 7.0 - 11.4 20 (68) 3.5 2.1 - 2.9 50 (122) 2.2 0.68 - 1.00 90 (194) 0.9 0.236 - 0.260 110 (230) 0.6 0.143 - 0.153 SEF012P DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause P0197 Engine oil tempera- An excessively low voltage from the sensor is • Harness or connectors (The sensor circuit is open or shorted.) • Engine oil temperature sensor P0198 Engine oil tempera- An excessively high voltage from the sensor is |