Car engine management system Mazda 626 (5)
The exhaust system includes an exhaust manifold with an oxygen sensor, a catalytic converter, an exhaust pipe and a muffler.
The exhaust system of a four-cylinder engine consists of an exhaust manifold, catalytic converter, intake pipe, front and rear mufflers. The exhaust system of the six-cylinder engine consists of two exhaust manifolds, a catalytic converter, front and rear mufflers.
Exhaust system components
Exhaust system components 1. Muffler; 2. Intermediate muffler; 3. Catalytic converter; 4. Intake pipe 5. Exhaust manifold; 6. Insulator (casing); 7. Oxygen sensor...
Exhaust system components 1. Muffler; 2. Intermediate muffler; 3. Catalytic converter; 4. Intake pipe 5. Exhaust manifold; 6. Insulator (casing); 7. Oxygen sensor...
Exhaust system maintenance
The exhaust system consists of an exhaust manifold or manifolds, a catalytic converter, a muffler and a tailpipe. The exhaust system components are attached to the body...
The exhaust system consists of an exhaust manifold or manifolds, a catalytic converter, a muffler and a tailpipe. The exhaust system components are attached to the body...
Emission control and engine management systems
Elements of emission control and engine management systems (model with a 4-cylinder engine built in 1998) 1. Throttle position sensor; 2. Idle air control valve; 3. Air...
Elements of emission control and engine management systems (model with a 4-cylinder engine built in 1998) 1. Throttle position sensor; 2. Idle air control valve; 3. Air...
Self-diagnosis system and error codes
Control and measuring equipment To test fuel injection systems and reduce exhaust emissions, it is necessary to use digital universal control and measuring instruments,...
Control and measuring equipment To test fuel injection systems and reduce exhaust emissions, it is necessary to use digital universal control and measuring instruments,...
Central control unit — removal and installation
The electronic control unit is located under the instrument panel in front of the center console. Removal and installation 1. Disable the airbag. 2. Remove the front...
The electronic control unit is located under the instrument panel in front of the center console. Removal and installation 1. Disable the airbag. 2. Remove the front...
Throttle position sensor
Examination 1. The throttle position sensor (arrow) is located on the throttle body. Disconnect the sensor connector and check that with the ignition on, the voltage...
Examination 1. The throttle position sensor (arrow) is located on the throttle body. Disconnect the sensor connector and check that with the ignition on, the voltage...
Air Flow Sensor — checking and replacing
Air flow sensor (models with a 6-cylinder engine produced before 1997) The air flow sensor (arrow) is located in the air intake duct. Air flow sensor (models with a...
Air flow sensor (models with a 6-cylinder engine produced before 1997) The air flow sensor (arrow) is located in the air intake duct. Air flow sensor (models with a...
Inlet air temperature sensor
Examination 1. The incoming air temperature sensor is a thermistor, meaning its resistance decreases as the sensor temperature increases. 4-cylinder models and...
Examination 1. The incoming air temperature sensor is a thermistor, meaning its resistance decreases as the sensor temperature increases. 4-cylinder models and...
Coolant temperature sensor
Location of the coolant temperature sensor (model with a 6-cylinder engine) The coolant temperature sensor is a thermistor, meaning its resistance decreases as the...
Location of the coolant temperature sensor (model with a 6-cylinder engine) The coolant temperature sensor is a thermistor, meaning its resistance decreases as the...
Crankshaft position sensor
Crankshaft/Camshaft Position Sensors The crankshaft/camshaft position sensors on some models are located in this housing on the ignition distributor (arrow). Connectors...
Crankshaft/Camshaft Position Sensors The crankshaft/camshaft position sensors on some models are located in this housing on the ignition distributor (arrow). Connectors...
Camshaft position sensor
Models produced between 1993 and 1997 Examination 1. Check that the battery voltage is present between the B+ terminal of the larger ignition distributor connector and...
Models produced between 1993 and 1997 Examination 1. Check that the battery voltage is present between the B+ terminal of the larger ignition distributor connector and...
Power steering system switch
Examination 1. Disconnect the switch connection connector. Start the engine. 2. Set the front wheels straight and check that the switch opens the circuit. 3. Turn the...
Examination 1. Disconnect the switch connection connector. Start the engine. 2. Set the front wheels straight and check that the switch opens the circuit. 3. Turn the...
Oxygen sensor — testing and replacement
The oxygen sensor checks the oxygen content in the exhaust gases. Based on information from the oxygen sensor, the electronic control unit regulates the composition of...
The oxygen sensor checks the oxygen content in the exhaust gases. Based on information from the oxygen sensor, the electronic control unit regulates the composition of...
Fuel detonation sensor
Examination To check the sensor, disconnect the connector and measure the resistance between terminal A and ground. It should be approximately 560 ohms. Replace the...
Examination To check the sensor, disconnect the connector and measure the resistance between terminal A and ground. It should be approximately 560 ohms. Replace the...
Speed sensor — checking and replacement
Examination 1. Disconnect the sensor connection connector (indicated by the arrow). 2. Raise the vehicle and support it on supports. Connect the voltmeter to the sensor....
Examination 1. Disconnect the sensor connection connector (indicated by the arrow). 2. Raise the vehicle and support it on supports. Connect the voltmeter to the sensor....
Air valve — checking and replacing
Location of the idle air control valve (models with a 4-cylinder engine) Location of the idle air control valve (models with a 6-cylinder engine) The air valve controls...
Location of the idle air control valve (models with a 4-cylinder engine) Location of the idle air control valve (models with a 6-cylinder engine) The air valve controls...
Low-speed additional air supply system
For models with 6-cylinder engine This system consists of two vacuum diaphragms (the first is located near the intake manifold, the second is behind the throttle body),...
For models with 6-cylinder engine This system consists of two vacuum diaphragms (the first is located near the intake manifold, the second is behind the throttle body),...
Crankcase ventilation system
Gas flow in the crankcase ventilation system 1. Ventilation valve 2. Crankcase gases 3. Fresh air The crankcase ventilation system directs crankcase gases into the...
Gas flow in the crankcase ventilation system 1. Ventilation valve 2. Crankcase gases 3. Fresh air The crankcase ventilation system directs crankcase gases into the...
Exhaust gas recirculation system
The exhaust gas recirculation system reduces nitrogen oxide emissions by directing a portion of the exhaust gases through the recirculation valve into the intake...
The exhaust gas recirculation system reduces nitrogen oxide emissions by directing a portion of the exhaust gases through the recirculation valve into the intake...
Fuel vapor collection system
The fuel vapor collection system consists of a carbon filter, a purge valve and connecting hoses. Examination 1. Check the condition of the hoses and connections. 2....
The fuel vapor collection system consists of a carbon filter, a purge valve and connecting hoses. Examination 1. Check the condition of the hoses and connections. 2....
Brake light switch
Examination 1. Check the power supply to the switch. 2. Use an ohmmeter to check that the switch opens and closes the circuit. Replacement 1. Remove the trim panel from...
Examination 1. Check the power supply to the switch. 2. Use an ohmmeter to check that the switch opens and closes the circuit. Replacement 1. Remove the trim panel from...
Catalytic converter — inspection and replacement
A catalytic converter is a device that reduces the content of harmful substances in exhaust gases. Examination 1. Inspect the catalytic converter for corrosion, dents,...
A catalytic converter is a device that reduces the content of harmful substances in exhaust gases. Examination 1. Inspect the catalytic converter for corrosion, dents,...
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More sections on repairs of other Mazda models
• User manual: Controls and instruments Mazda3 BK (2003-2009)
• User manual: Controls and instruments Mazda6 GG (2002-2008)
• User manual: Controls and instruments Mazda3 BK (2003-2009)
• User manual: Controls and instruments Mazda6 GG (2002-2008)
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- General information
- Introduction to guide
- User manual
- Troubleshooting
- Maintenance
- Power unit
- 4-cylinder engines
- 6-cylinder engines
- Engine overhaul
- Cooling and ventilation
- Power and exhaust systems
- Engine electrics
- Control system
- Transmission
- Mechanical gearbox
- Automatic gearbox
- Clutch and drive shafts
- Chassis
- Brake system
- Car suspension
- Steering
- Body
- Exterior (external elements)
- Interior (internal elements)
- Doors, windows and locks
- Electrical equipment
- Equipment and devices
- Electrical circuits
- General information
- User manual
- Maintenance
- Helpful hints
- Power unit
- Petrol engines 1.6 and 1.8
- Petrol engines 2.0
- 2.5 petrol engines
- Overhaul engines 1.6 and 1.8
- Overhaul engines 2.0 and 2.5
- Diesel engine 2.0
- Engine electrics
- Cooling system
- Air conditioner
- Carburetor Nikki 30/34
- Power system (1.6 and 1.8)
- Power system (2.0 and 2.5)
- Control system
- Transmission
- Mechanical gearbox
- Automatic gearbox
- Clutch and axles
- Chassis
- Brake system
- Suspension and wheels
- Steering
- Body
- Exterior (external elements)
- Interior (internal elements)
- Doors and windows
- Electrical equipment
- Equipment and devices
- Electrical circuits
- General information
- Introduction to manual
- Vehicle specifications
- Power unit
- Engine repair
- Lubrication system
- Cooling system
- Fuel system (carburetor)
- Fuel injection (FE)
- Fuel injection (DOHC)
- Fuel system (diesel)
- Ignition system
- Transmission
- Clutch
- Gearbox
- Drive shafts
- Chassis
- Front suspension
- Rear suspension
- Steering system
- Brake system
- Electrical equipment
- Equipment and devices
- Electrical circuits
- General information
- User manual
- Maintenance
- Power unit
- Gasoline engine
- Engine overhaul (gasoline)
- Diesel engine
- Cooling and heating
- Supply system
- Ignition system
- Emission reduction
- Transmission
- Clutch
- Mechanical gearbox
- Automatic gearbox
- Drive shafts
- Chassis
- Brake system
- Suspension and wheels
- Steering
- Body
- Exterior (external elements)
- Interior (internal elements)
- Electrical equipment
- Equipment and devices
- Power devices
- Electrical circuits
- General information
- User manual
- Maintenance
- Troubleshooting
- Late models
- Power unit
- Engine in car
- Engine overhaul
- Cooling and heating system
- Fuel and exhaust system
- Engine electrical system
- Emission control system
- Transmission
- Mechanical gearbox
- Automatic gearbox
- Clutch and drive shafts
- Chassis
- Brake system
- Suspension and wheels
- Steering
- Body
- Exterior (external elements)
- Interior (internal elements)
- Electrical equipment
- Equipment and devices
- Lighting and lamps
- Electrical circuits