4. Check the continuity from sensor connector pins to the ECU pins. 5. Physical damage to flywheel. 6. Improper Air Gap between sensor and flywheel. CONNECTOR DETAIL PINOUT DETAILS COMPONENT SPECIFICATION Crank angle sensor provides engine speed and crank angle input to ECU. 58 teeth are spaced at an angle of 60 each on the flywheel and two teeth missing at 114° ATDC (Top Dead Centre) of cylinder 1 allows the piston position to be determined. Crank angle sensor is positioned on these teeth, so that an AC voltage is induced in sensor coil, when the flywheel tooth projection passes through the sensor. The AC voltage is proportional to the speed of rotation. The sensor is mounted in the engine compartment. It is used for the detection of the crankshaft position and speed. The sensor detects the slots and teeth of a ferromagnetic target wheel and delivers an electrical signal according to the movements of the target wheel. Therefore the signal represents the speed and position of the crankshaft. Proper function of the sensor can only be covered, if the specified mating connector is properly assembled. All wire seals have to be in place. With an unsealed connector the sensor will not be waterproof. Crank angle sensor is an inductive type 2 pin connector, is mounted on cylinder block over the crank sensor wheel. Sensor gap to be maintained -: 1.0 ± 0.4 mm Mount the sensor using a suitable bracket and tighten the bolt to the specified torque. OPERATING PRINCIPLE Due to the rotation of a ferromagnetic target wheel in front of the DG the magnetic field of a magnet is modulated at the place of a coil, i.e. with a tooth in front of the DG the magnetic flux through the coil will increase, with a slot it will decrease. This modulation results in changes of the output signal/voltage. The change of the magnetic field causes magnetic induction in a coil by variation of the magnetic flux. SENSOR STAND ALONE DIAGNOSIS Use multimeter to check for coil resistance across pin 1 and pin 2, which should be between 300 ohms to 420 ohms Use TATA diagnostic tool to check for engine rpm during cranking. PIN DESCRIPTION 1 Supply 2 Output 3 Ground Petrol Engine Ph-2 (CAFÉ) 184
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