3.1.13-12
CS35 2013.04
3.1.13-12Electronic Control System - ME7
Camshaft Position Sensor
The camshaft position sensor is mounted on the
rear of the valve chamber cover, and the signal
wheel in the rear of the intake and exhaust cam-
shafts synchronously operating with the intake
and exhaust camshafts. The camshaft position
sensor is a Hall effect sensor, to provide the
phase information of the intake and exhaust cam-
shafts for ECM determining the working cycle
stroke of the engine, and to make ECM control
the intake and exhaust variable timing solenoid
valve according to the information of other engine
sensors.
Crankshaft Position Sensor
Crankshaft position sensor is a electromagnetic
induction sensor on the clutch body and captures
flywheel signal ring. Signal ring has 58 teeth and
ECM judges top dead center position from signal
of missing teeth. Camshaft position sensor can
not be adjusted, and it is not required to set up
process during installation.
Pre - Catalytic Oxygen Sensor
Pre - catalytic oxygen sensor is on the exhaust
manifold, before the three - way catalytic device,
it is a zirconia oxygen sensor. Pre - catalytic oxy-
gen sensor is used to monitor the oxygen content
of the gases that generated from the burning of
air - fuel mixture in the combustion chamber. The
signal from the pre - catalytic oxygen sensor is
received by the ECM and is used to adjust the
injector pulse width.
Post - Catalytic Oxygen Sensor
Post - catalytic oxygen sensor located behind the
three - way catalytic converters, used to detect
the catalytic conversion capacity and oxygen stor-
age capacity of the catalytic converters. The post
- catalytic oxygen sensor is a zirconia oxygen
sensor, and ECM receives the signals of post -
catalytic oxygen sensor and compare it with the
signal that from the pre - catalytic oxygen sensor.
If the three - way catalytic converter is working
normally, also the fuel the engine electrical control
system is in closed loop control, the sensor volt-
age output with stable 0.45 V voltage.
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