|
|
MPI - Troubleshooting 13A-19 Code No. P0115 Engine coolant temperature sensor system Probable cause Inspection Range After setting the ignition switch to the “ON” position, or 2 seconds after completion of engine start. Evaluation Conditions When the sensor output voltage is more than 4.6 V for 4 seconds (Equivalent to water temperature of less than -45_C) or When the sensor output voltage is less than 0.1 V for 4 seconds (Equivalent to water temperature of more than 140_C) D Engine coolant temperature sensor malfunction D Engine coolant temperature sensor circuit disconnection and short-circuit or connector contact defect D Engine-ECU malfunction Inspection Range Ignition switch: ON D The engine speed is approximately 50 r/min or more. Evaluation Conditions From less than 1.6 V (Equivalent to water temperature of more than 40_C), the sensor output voltage rises to more than 1.6 V (Equivalent to water temperature of less than 40_C) D The sensor output voltage is more than 1.6 V for 5 minutes OK To the next page OK Measure at the B-118 engine coolant temperature sensor connector. Disconnect the connector and measure at the sensor side. D Resistance between terminals No. 1 and No. 2 OK: Water temperature -20_C 14 - 17 kΩ Water temperature 0_C 5.1 - 6.5 kΩ Water temperature 20_C 2.1 - 2.7 kΩ Water temperature 40_C 0.9 - 1.3 kΩ Water temperature 60_C 0.48 - 0.68 kΩ Water temperature 80_C 0.26 - 0.36 kΩ NG Replace the engine coolant temperature sensor. NG Check the following connector: B-118 NG Repair MUT-II Data list No. 21 Engine coolant temperature sensor OK: When cool, more or less the same as the ambient temperature (air tempera- ture) When warm 80 - 120_C OK Intermittent malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.) |