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.
1984 Toyota 4Runner BaseFACTORY OEM SERVICE PROCEDURE
Fuel Pump Circuit
- Turn ignition "ON". Remove cap from fuel pump test connector. Using a jumper wire, jump both terminals of connector. Connector is located below air flow meter on Camry, Cressida, and Supra models. On Celica models it is located next to the throttle body. Starlet check connector is on wiring harness on left side of engine.
- Fuel pressure should be felt at cold start injector hose and noise of fuel returning to tank should be heard at fuel pressure regulator.
- Remove jumper wire, install connector cap and turn ignition "OFF". If none of the above conditions were met, check fusible link, engine fuse, fuel injection fuse, circuit opening relay, fuel pump, and all electrical connectors.
Factory Service Tools
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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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