Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1989 Mazda 626 BaseFACTORY OEM SERVICE PROCEDURE
System/Component Tests - 4-CYL
- Introduction
- Turbocharger
- Engine Sensors & Switches
- A/C Switch
- Airflow Meter
- Atmospheric Pressure Sensor
- Brake Light Switch
- Clutch Switch
- Coolant THERMOSENSOR
- Coolant Temperature Switch
- Crank Angle Sensor
- EGR Position Sensor (MX-6 & 626)
- Electric Load Control (ELC) Unit
- Voltage Charts
- Idle Switch
- Inhibitor Switch (A/T)
- Intake Air Sensor (Dynamic Chamber)
- Neutral Switch (M/T)
- Oxygen Sensor (O2)
- Power Steering Switch
- Pulsation Damper
- Stoplight Switch
- Throttle Position Sensor
- Vehicle Speed Sensor
- 5TH Gear Switch (M/T)
- Relays, Solenoids, Motors & Modules
- Fuel System
- Ignition System
- Emission Systems & Sub-Systems
- Notes
- Secondary Air Injection
- Air Pump
- Converter Air Line Check Valve
- Intake Manifold Check Valve
- Air Control Valve
- Relief Solenoid Valve Signal Check
- Switching Solenoid Valve Signal Check
- Split Air Solenoid Valve (M/T Models)
- Split Air Solenoid Valve (A/T Non-Turbo Models)
- Port Air Solenoid Valve (Turbo)
- Port Air Solenoid Valve (Non-Turbo)
- Relief Solenoid Valve (Non-Turbo)
- Relief Solenoid Valve (Turbo)
- Switching Solenoid Valve
- Fuel Evaporation
- System Inspection (B2600i & MPV 2.6L)
- System Inspection (MX-6 & 626)
- System Inspection (323)
- Evaporation Line
- Check Valve (B2600 & MPV 2.6L)
- Check & Cut Valve
- Coolant Thermovalve (MX-6 & 626)
- Purge Control Valve (Except B2600i & MPV 2.6L)
- Purge Control Solenoid Valve (B2600i & MPV 2.6L)
- Purge Solenoid (MX-6, 323 & 626)
- 3-Way Valve (323, MX-6 & 626)
- PCV
- EGR System Test (MX-6 & 626)
- EGR Control Valve
- EGR Position Sensor
- EGR Solenoid
- EGR Vacuum Check Valve
- Deceleration Control System (MX-6, 323 & 626)
- High Altitude Compensation System (323)
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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