NANO

ENGINE 273 MPFI 255 ENGINE System Integration : The sensor provides the crank shaft position input to the ECU. The system uses a 36-2 = 34 tooth spaced at 10 degree intervals. Target wheel has two tooth missing (at 225 degree ATDC of cylinder 1) to allow the engine position to be determined. The sensor signal is used to calculate engine speed & crank shaft position. Stand Alone Diagnosis : Refer 3.11.5 Trouble Shooting and Diagnosis. SystemDiagnosis • Use TATADiagnostic Tool. • Check for engine RPM during cranking. On vehicle Removal, Inspection & Refitment Procedure : Removal of Crank shaft position sensor • Remove the crank shaft position sensor. Precaution : Pull the connector after pressing the lock. • Remove the bolt of the crank shaft position sensor with the help of ring spanner. Refitment of Crank angle sensor : • Refit the bolt of the crank shaft position sensor. • Refit the crank shaft position sensor. Inspection of crank angle sensor : • Check the resistance of crank shaft position sensor. (Acceptable value 890 +/- 89 Ohm) COOLANT TEMPERATURE SENSOR Type TF-W Location Coolant Temperature Sensor is fitted on cylinder head near thermostat. Working Principle: The temperature sensing circuit uses Thermistor that is sensitive to change in temperature. It has basically the NTC (Negative Temperature Coefficient) means as the temperature increases as the resistance decreases. Installation Details: Installation Torque: - 18 to 25 Nm (Excessive torque may lead to shear of sensor)