Mazda 2: Camshaft Position (CMP) Sensor
CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION
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 cable.
2. Disconnect the CMP sensor connector.
3. Remove the CMP sensor.
4. Verify that the O-ring is not damaged.
- If there is a damage, replace the CMP sensor.
5. Apply a small amount of clean oil to the O-ring and the cylinder head cover.
6. Install in the reverse order of removal.
CAMSHAFT POSITION (CMP) SENSOR INSPECTION
Visual Inspection
1. Remove the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION).
2. Verify that there are no metal shavings on the sensor.
- If there is a malfunction, replace the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION).
3. Install the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION).
Voltage Inspection
CAUTION:
- Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.
1. Idle the engine.
2. Measure the camshaft position signal and verify that rectangular waves are produced.
(See PCM INSPECTION).
3. If not as specified, replace the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION).
