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.
2002 Mazda 626 ES, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Basic Diagnostic Procedures
- Introduction
- Preliminary Inspection & Adjustments
- Fuel System
- Preliminary Checks
- Fuel Pressure Release
- Fuel Pressure (Except B2300, B3000, B4000 & Tribute)
- Fuel Pressure Hold Inspection
- Fuel Line Pressure Inspection
- Fuel Pump Inspection
- Fuel Pump Hold Pressure Inspection
- Fuel Pump Maximum Pressure Inspection
- Fuel Pump Relay Inspection (Miata)
- Fuel Pump Resistor & Relay (Millenia 2.3L)
- Fuel Pump Relay Inspection (Millenia 2.5L, Protege, Protege5 & 626)
- Fuel Pump Relay Inspection (MPV)
- Fuel Pressure Regulator Inspection
- Injector Fuel Leakage Inspection
- Fuel Pressure (B2300, B3000, B4000 & Tribute)
- Ignition Checks
- Notes
- Except B2300, B3000, B4000 & Tribute
- Spark Check
- Camshaft Position Sensor (Miata)
- Camshaft Position Sensor (Millenia 2.3L)
- Camshaft Position Sensor (Millenia 2.5L)
- Camshaft Position Sensor (MPV)
- Camshaft Position Sensor (Protege & Protege5)
- Camshaft Position Sensor (626 2.0L)
- Camshaft Position Sensor (626 2.5L)
- Crankshaft Position Sensor Resistance (Except Miata)
- Crankshaft Position Sensor Air Gap (Except MPV)
- Ignition Coil Operation Inspection (Miata, Protege & Protege5)
- Ignition Coil Resistance (Miata, Protege & Protege5)
- Ignition Coil Resistance (Millenia 2.3L)
- Ignition Coil Resistance (Millenia 2.5L)
- Ignition Coil Resistance (MPV)
- Ignition Coil Resistance (626)
- Ignition Control Module (Millenia)
- B2300, B3000, B4000 & Tribute
- Idle Speed & Ignition Timing
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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