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.
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HOMESERVICE MANUALSMAZDA1998PROTEGE DX, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMFUEL PRESSURE (EXCEPT B2500, B3000 & B4000)FUEL PUMP RELAY
1998 Mazda Protege DX, Automatic
Fuel Pump Relay
1998 Mazda Protege DX, AutomaticSECTION Fuel Pump Relay
- Locate fuel pump relay. See FUEL PUMP RELAY LOCATIONS table under FUEL PRESSURE RELEASE. Using jumper wires, connect battery voltage to fuel pump relay terminal "A" (positive) and terminal "B" (negative). See Fig 1 or Fig 2 .
- On MPV and Protege, check continuity between fuel pump relay terminals "C" and "E". On Millenia and 626, check continuity between fuel pump relay terminals "C" and "D". On all models, with battery voltage connected, continuity should exist. With battery voltage disconnected, continuity should not exist. If continuity is not as specified, replace fuel pump relay.
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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.