Mazda 6 Facelift 2005 Training Manual page 41

Engine
•
The CKP sensor consists of an IC (Integrated Circuit) with a GMR (Giant Magneto
Resistive) element and an integrated signal processing circuit, and a magnet. Signal
reliability has been improved with the adoption of the GMR element resulting in the
signal amplitude being wider compared to the Hall element.
•
Signal detection uses the special characteristics of GMR to change the electrical
resistance corresponding to the magnetic field.
•
The size of the magnetic field detected by the GMR element is changed into square
waves at the signal processing circuit, and then sent to the PCM.
NOTE: If the crankshaft position sensor is removed/installed or replaced, magnetized
objects such as metal shavings adhering to the sensor could cause fluctuation in the
magnetic flux, causing abnormal sensor output which could adversely affect engine
control.
1 Large gaps
2 Rotation
3 CKP sensor
4 Pulse wheel
5 From main relay
6 CKP output signal
Service Training Mazda6 Facelift
7 PCM
8 CPU (Central Processing Unit)
9 CKP output signal
10 16 tooth
11 13 tooth
Petrol Engines
M6FL_01024
01-27