Diesel Engines Engine
Camshaft Position Sensor
• A GMR-type CMP sensor has been introduced, which is located at the vacuum pump.
The sensor consists of two GMR elements and a magnet, which scan a rotor with five
teeth. The rotor is attached to the drive gear of the power steering oil pump.
NOTE: When the CMP sensor is faulty, this can be recognized by the increased engine
noise (Diesel knocking). In order to identify cylinder No.1 during engine start the
PCM injects metered quantities of fuel into the individual cylinders and monitors the
engine speed via the CKP sensor. The cylinder in question is the one where the
engine speed increases after fuel has been injected. As a result, the starting process
takes longer than normal.
M6FL_01073
1 Cylinder head 5 0.5 V
2 CMP sensor 6 Ground
3 Output signal 7 Cam angle
4 5 V 8 Toothed rotor
01-88 Service Training Mazda6 Facelift
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