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 MANUALSTOYOTA1997TERCEL 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMFUEL PUMP OPERATIONCHECKING FUEL PUMP OPERATION USING SCAN TOOL
1997 Toyota Tercel 4D Sedan, Automatic
Checking Fuel Pump Operation Using Scan Tool
1997 Toyota Tercel 4D Sedan, AutomaticSECTION Checking Fuel Pump Operation Using Scan Tool
- Remove cover (if equipped) and connect scan tool to data link connector No. 3. See Fig 1. Turn ignition on. DO NOT start engine.
- Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate fuel pump. Listen for fuel pump operating sound and feel for pressure in fuel inlet line from fuel filter. Turn ignition off. Remove scan tool. If fuel pump operates, check fuel pressure. See FUEL PRESSURE under FUEL SYSTEM.
- If fuel pump does not operate, EFI main relay, circuit opening relay or fuel pump relay (if used) may be defective. For relay application and explanation of relay operation, see FUEL PUMP CONTROL CIRCUIT .
- If relays are okay, check for defective wiring circuit, defective fuses, defective fuel pump or defective fuel pump ground circuit. See appropriate wiring diagram in WIRING DIAGRAMS article.
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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.