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 MANUALSTOYOTA19904RUNNER 2D UTILITY, 2.4 R, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - EFIMODULES, MOTORS, RELAYS & SOLENOIDSCIRCUIT OPENING RELAY
1990 Toyota 4Runner 2D Utility, 2.4 R, Automatic
Circuit Opening Relay
1990 Toyota 4Runner 2D Utility, 2.4 R, AutomaticSECTION Circuit Opening Relay
To check circuit opening relay, See Fig 1 and Fig 2 . See CIRCUIT OPENING RELAY LOCATION table. Replace relay if defective.
NOTE:
During cranking, there should be 12 volts present at "FP" terminal of circuit opening relay. This is the fuel pump (or fuel pump relay) line. See appropriate WIRING DIAGRAMS article for wire color.
RENDER: 1.0x
NO RELATED
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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.