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Revotron 1.2T
149
Component Specification :
Cam Shaft sensor measures the speed of
the CAM shaft. The cam phase sensor is
mounted on cylinder head cover, with a gap of
1.5± 0.5mm between cylinder head cover
surface and sensor tip. The sensor provides
input signal to ECU to determine the phase,
i.e. the sensor provides signal voltage when
the target wheel passes through the sensor.
The position of target wheel indicates the
engine phase. Cam shaft sensor contains a
permanent magnet and a Hall IC. Due to the
rotation of a ferromagnetic target wheel in
front of Sensor, the magnetic field is
modulated at the place of the hall probe. With
a tooth in front of the sensor, the magnetic
field increases, with a slot it decreases. This
modulation results in changes of the output
signal. The magnetic field is evaluated by the
hall probe in the ASIC.
Sensor Stand alone Diagnosis :
Connector details
1. Ground
2. ECU pin M1F3 : (signal to ECU)
3. 12V supply (through ECU power supply)
with ignition key is 'ON' position, use
multimeter to measure the supply voltage
across pin1 and pin3, which should be 12V
DC.
Measure the signal voltage across pin1 and
pin2.
iv. Knock Sensor :
Component Details :
Knock Sensor consists of a piezoelectric
element. Piezoelectric elements generate
voltage when vibration or pressure is applied
to them. The Piezoelectric element in the
knock sensor is tuned to the Engine Knock
Frequency.
Component Location :
The knock sensor is mounted on the
cylinder block.
Preliminary Checks :
1. Faulty Knock Sensor
2. Check for P0327-11, P0328-12 - Improper
Wiring Harness Connections between
Knock Sensor and EMS ECU.