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HOMESERVICE MANUALSTOYOTA19904RUNNER 2D UTILITY, 2.4 R, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTING - EFIFUEL PUMP QUICK TEST
1990 Toyota 4Runner 2D Utility, 2.4 R, Automatic

Fuel Pump Quick Test

1990 Toyota 4Runner 2D Utility, 2.4 R, AutomaticSECTION Fuel Pump Quick Test
  1. Turn ignition on, with engine off. Place jumper wire across +B and FP terminals of engine check connector in engine compartment. See Fig 1. See ENGINE CHECK CONNECTOR LOCATION table.
  2. Listen for fuel pump running sound. Feel for pressure in fuel line between filter and fuel rail. Turn ignition off. Remove jumper wire. If fuel pump sound was present and fuel hose showed pressure, go to FUEL SYSTEM PRESSURE TEST .
  3. If no pressure or fuel pump sound was present, connect a jumper wire from battery source to FP terminal of engine check connector.
  4. If fuel pump does not run or no fuel pressure is felt in line, check for defective fuel pump. Check for open circuit between engine check connector and fuel pump or poor fuel pump ground. See WIRING DIAGRAMS article.
    NOTE: All models use in-tank fuel pump. Fuel pump contains internal relief valve and check valve.
  5. If fuel pump ran after battery source was connected to FP terminal in step 3), check EFI main relay and related wiring. Also check EFI and IGN fuses. See FUEL PUMP CONTROL CIRCUIT  in this article. For more information on wiring, see the WIRING DIAGRAMS article in this section.
ENGINE CHECK CONNECTOR LOCATION

Model (1) Location
Camry, Corolla & Cressida On Left Shock Tower
Celica & Tercel Behind Left Shock Tower
Land Cruiser On Firewall, Under Wiper Motor
Pickup/4Runner On Right Fenderwell
Supra In Front of Left Shock Tower
(1) Label on inside of engine check connector cover has check connector pin identification. All FP and +B pins will be in same location.
Fig 1: Locating Typical Engine & Fuel Pump Check Connectors
G90D18385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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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.