Mazda 3 Service Manual: Valvetrain, Cylinder Head

Crankshaft Position (CKP) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]

Removal CAUTION: When foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine ...

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 outpu ...

Other materials:

Front Seat Cover Removal/Installation [Vehicles With Power Seat System]
WARNING: Handling a front seat (with built-in side air bag) improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings before handling a front seat (with built-in side air bag).. CAUTION: After removing a front seat ...

Fuel Injector Inspection [Mzr 2.0, Mzr 2.5]
Resistance Inspection 1. Remove the battery cover.. 2. Disconnect the negative battery cable.. 3. Disconnect the fuel injector connector. 4. Inspect the resistance between fuel injector terminals A and B. Fuel injector resistance 11.4—12.6 ohms [20 °C {68 °F}] If not ...

Intake Air System Removal/Installation [Mzr 2.0, Mzr 2.5]
WARNING: A hot engine and intake air system can cause severe burns. Turn off the engine and wait until they are cool before removing the intake air system. Fuel is very flammable liquid. If fuel spills or leaks from the pressurized fuel system, it will cause serious injury or d ...