Mazda 3 Service Manual: Control

Timing Chain Removal/Installation [Skyactiv G 2.0]

WARNING: A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing. CAUTION: If the camshaft is rotated with the timing chain removed ...

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Other materials:

Input/Turbine Speed Sensor Removal/Installation [FS5 A EL]
CAUTION: Always use a new bolt. If the removed input/turbine speed sensor installation bolt is reused, it may cause oil leakage. A sealant coating is applied to the input/turbine speed sensor installation bolt to prevent oil leakage from the installation bolt hole which passes ...

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 malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control. ...

EGR Valve Inspection [Mzr 2.0, Mzr 2.5]
Resistance Inspection 1. Remove the battery cover.. 2. Disconnect the negative battery cable.. 3. Disconnect the EGR valve connector. 4. Measure the resistance between the EGR valve terminals. EGR valve terminal Resistance inspection (ohm) ...