139 ENGINE2.2LDICOR EMSSensors Fig. 224 Fig. 225 Fig. 226 1. CrankAngle sensor (Fig. 224) The crank angle sensor is fitted on the Clutch Housing. The crank sensor is a magnetic field sensitive transducer and generates a voltage output proportional to the rate of change of the magnet ic f ield near a "Missing tooth" configuration. It monitors the rotating speed (rpm), the position of crankshaft/ piston and speed fluctuations of the engine and gives continuous feed back to the ECU. In other words it gives engine speed and piston position signal to the ECU. The sensor gap should be 1±0.5mm&should be measured using feeler gauge. If the gap between the flywheel and crank angle sensor is not correct, the engine will not start. 2. VehicleSpeedSensor (Fig. 225) This sensor is located on the Transfer case / Gear box based on the application which gives vehicle speed information to theECU. It also helps theECU in determining in which gear the vehicle is driving and ensures smooth driving at all gears. Note In case of 4 x 4 Vehicles the VSS is located on transfer case. 3. Camsensor (Fig.226) The cam sensor is fitted on the bearing frame. The camsensor is amagnetic field sensitive transducer and generates a voltage output proportional to the rate of change of the magnetic field near a "camshaft lobe" configuration. The cam sensor senses the position of the flag on the Exhaust camshaft and gives feed back to the ECU regarding the cylinder No.1 (90ºBTDC). The sensor gap should be 1±0.4mm. If the gap is not correct and also the position of camshafts with respect to crank shaft (set during assembly), the engine will not start. While the engine is running & the cam sensor fails then the engine will continue to run till the engine will stop & will not start again.
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