Mazda 3 Service Manual: Camshaft Position (CMP) Sensor Inspection [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Control / Sensors, Switches, Relays / Camshaft Position (CMP) Sensor Inspection [Mzr 2.0, Mzr 2.5]

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. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Remove the plug hole plate..

4. Disconnect the CMP sensor connector.

5. Remove the CMP sensor..

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

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 CMP signal and verify that rectangular waves are produced..

If not as specified, replace the CMP sensor..

Air Fuel Ratio (A/F) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]

WARNING: A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system. 1. Remove the battery cover.. 2 ...

Camshaft Position (CMP) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]

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 malfu ...

Other materials:

Thermostat Inspection [Mzr 2.0, Mzr 2.5]
1. Remove the thermostat.. 2. Visually check that the thermostat valve is closed. 3. Place the thermostat in water. WARNING: During inspection, the thermostat and water are extremely hot and can cause severe burns. Do not touch the thermostat and water. 4. Heat the water and c ...

Rear Brake (Disc) Removal/Installation
CAUTION: If the brake hose is installed to the caliper on the vehicle, the tool cannot be installed correctly resulting in brake fluid leakage due to improper installation. Therefore, remove the caliper and brake hose as a single unit when removing the caliper or brake hose, and tig ...

PCM Inspection [Mzr 2.0, Mzr 2.5]
Using M-MDS NOTE: PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor Main relay 1. Connect the M-MDS to the DLC-2. 2. Switch the ignition to ON. 3. Measure the PID value. ...