Eccentric Shaft Position Sensor Function; Eccentric Shaft Position Sensor Construction/Operation - Mazda RX-8 2004 Service Highlights

KS Characteristic (When 1G applied)
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ECCENTRIC SHAFT POSITION SENSOR FUNCTION

• Detects the rotation pulse of the eccentric shaft position plate as an eccentric shaft angle signal.
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ECCENTRIC SHAFT POSITION SENSOR CONSTRUCTION/OPERATION

• Installed on the front housing.
• The sensor pulse wheel has 30 teeth and 3 areas
with no teeth.
• The angle between two notches is 10°, and the
angle between two notches where there are no
teeth is 30°.
• Sends the change in the amount of magnetic flux
density detected at the magnet pickup coil in the
eccentric shaft position sensor to the PCM as a
voltage value.
• When the eccentric shaft position sensor is
removed, installed, or replaced, magnetic flux of
the magnet pickup coil will be disturbed, if
magnetic material such as iron powder adheres to
the sensor, resulting in abnormal sensor output, which may adversely affect the engine control.
ECCENTRIC SHAFT
POSITION PLATE
30°
BTDC 5°
10°
(FRONT)
ECCENTRIC SHAFT POSITION SENSOR
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CONTROL SYSTEM
FRONT
INTAKE
ROTOR
REAR
ROTOR
BTDC 5°
COMBUSTION
(REAR)
30°
30°
ECCENTRIC SHAFT
POSITION SENSOR
±
26 8
0
LOW
FREQUENCY
ECCENTRIC SHAFT
POSITION SENSOR
COMBUSTION
COMPRESSION
EXHAUST
COMPRESSION
INTAKE
EXHAUST
BTDC 5°
HIGH
CHU0140S089
CHU014018221S01
CHU014018221S02
CHU0140S069
EXHAUST
INTAKE
COMBUSTION
COMPRESSION
BTDC 5°
PCM
CPU
CPU
CHU0140S070
01–40–53
01–40