Revotron 1.2T
152
Connector View :
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 1140 ATDC
(Top Dead Centre) of cylinder 1 allows the
piston position to be determined. Crank angle
sensor is positioned on this 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 3 pin
connector, is mounted on cylinder block over
the flywheel. Sensor gap to be maintained -:
1.5 ± 0.75 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
1. ECU pin M2B1 : +ve
2. ECU pin M2B2 : -ve
3. Shield
Use TATA diagnostic tool to check for
engine rpm during cranking.
