Checking Fuel Pump Operation Using Toyota Hand-Held Tester (Celica, Corolla, ECHO, Highlander, MR2, Matrix, Prius & RAV4)

WARNING: On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .

1. Connect hand-held tester to data link connector No. 3 at driver's side of instrument panel. See Fig 3-Fig 9 . Turn ignition on. DO NOT start engine.
2. Turn hand-held tester on. Select ACTIVE TEST MODE on hand-held tester. Using hand-held tester manufacturer's instructions, operate fuel pump. Listen for fuel pump operating sound and feel for fuel pressure in fuel inlet pipe at end of fuel rail. Turn ignition off. Remove hand-held tester. If fuel pump operates, check fuel pressure. See FUEL PRESSURE .
3. If fuel pump does not operate, EFI main relay or circuit opening relay may be defective. For relay application and explanation of relay operation, see FUEL PUMP CONTROL CIRCUIT . For testing of EFI main relay or circuit opening relay, see appropriate relay under MODULES, MOTORS, RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
4. If relays are okay, check for defective fuses, fusible links or wiring. See appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. If fuses, fusible links and wiring are okay, check for defective fuel pump. See CHECKING FUEL PUMP OPERATION BY APPLYING BATTERY VOLTAGE TO FUEL PUMP (CAMRY SOLARA, CELICA, COROLLA, ECHO, HIGHLANDER, MR2, MATRIX, PRIUS, RAV4 & TACOMA) . If fuel pump operates properly, Engine Control Module (ECM) may be defective.
   NOTE: For additional testing information for fuel pump control circuit, see FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.

Fig 1: Locating Data Link Connector No. 3 (Camry)

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Fig 2: Locating Data Link Connector No. 3 (Camry Solara)

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Fig 3: Locating Data Link Connector No. 3 (Celica)

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Fig 4: Locating Data Link Connector No. 3 (Corolla & Matrix)

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Fig 5: Locating Data Link Connector No. 3 (ECHO)

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Fig 6: Locating Data Link Connector No. 3 (Highlander)

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Fig 7: Locating Data Link Connector No. 3 (MR2)

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Fig 8: Locating Data Link Connector No. 3 (Prius)

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Fig 9: Locating Data Link Connector No. 3 (RAV4)

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Fig 10: Locating Data Link Connector No. 3 (Tacoma)

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