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CAMSHAFT POSITION (CMP) SENSOR INSPECTION [SKYACTIV-D 1.8]

CAMSHAFT POSITION (CMP) SENSOR INSPECTION [SKYACTIV-D 1.8]

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Visual Inspection

Caution
•  When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control.

1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2.  Remove the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

3.  Verify that there are no metal shavings on the CMP sensor.

•  If there is a malfunction, remove any metal shavings that are adhering.


Voltage Inspection

Caution
•  When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control.
•  If the wiring harnesses or waterproof connectors are damaged, water penetrating the connector will cause a sensor malfunction. To prevent this, be careful not to damage wiring harnesses or waterproof connectors.

1.  Idle the engine.

2.  Measure the output voltage wave pattern between CMP sensor terminals C and B using an oscilloscope.

•  If not as specified, replace the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

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•  Specification
4.5 V or more (Maximum value of wave pattern)
1.0 V or less (Minimum value of wave pattern)

Wave pattern (reference)

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Oscilloscope setting
•  1 V/DIV (Y), 20 ms/DIV (X), DC range
Vehicle condition
•  Idle (after warm up)