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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Control System & Component Testing - 4-Cylinder) >> Computerized Engine Controls >> Fuel Pump Control Circuit >> Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4 & Tacoma

Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius, RAV4 & Tacoma

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
  1. If Toyota hand-held tester is available, go to next step. If Toyota hand-held tester is not available, go to step  3.
  2. Check operation of fuel pump by using Toyota hand-held tester. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article. If fuel pump does not operate when using hand-held tester, go to step  5. If fuel pump operates when using hand-held tester, diagnose by symptom. See TROUBLE SHOOTING - NO CODES article.
  3. Remove necessary components for access to Engine Control Module (ECM). See ENGINE CONTROL MODULE LOCATION  table.
  4. Note ECM terminals. See Figure-Figure . Turn ignition on. Momentarily connect jumper wire between body ground and FC terminal at ECM and listen for fuel pump operating sound. See ECM IDENTIFICATION FOR FUEL PUMP FC TERMINAL  table. On Camry, Celica, Corolla, ECHO, Highlander, MR2, Prius and RAV4, feel for fuel pressure in fuel inlet line at end of fuel rail when fuel inlet line is pinched closed. On Camry Solara, feel for fuel pressure in fuel inlet line at fuel filter when fuel inlet line is pinched closed. On Tacoma, feel for fuel pressure in fuel return line from fuel pressure regulator when fuel return line is pinched closed. On all models, if fuel pump does not operate when jumper wire was connected, go to next step. If fuel pump operates when jumper wire was connected, diagnose by symptom. See TROUBLE SHOOTING - NO CODES article.
  5. Check ECM power source circuit. See ENGINE CONTROL MODULE POWER SOURCE CIRCUIT . If ECM power source circuit is okay, go to next step. If ECM power source circuit is defective, repair as necessary.
  6. Check circuit opening relay. See CIRCUIT OPENING RELAY  under MODULES, MOTORS, RELAYS & SOLENOIDS. If circuit opening relay is okay, go to next step. If circuit opening relay is defective, replace circuit opening relay.
  7. Remove necessary components for access to ECM if not previously done. See ENGINE CONTROL MODULE LOCATION  table.
    ENGINE CONTROL MODULE LOCATION

    Model (1) Location
    Camry & Camry Solara Behind Glove Box
    Celica In Engine Compartment, Below Cover, Just In Front Of Battery, Next To Driver's Side Strut Tower
    Corolla Behind Stereo On Instrument Panel, Just In Front Of Center Console
    ECHO & Highlander Behind Glove Box
    MR2 On Inside Of Firewall, Directly Behind Driver's Seat & Luggage Compartment
    Prius Behind Glove Box
    RAV4 Near Passenger's Side Kick Panel, Just Below Instrument Panel
    Tacoma Behind Glove Box
    (1) For illustration of ECM location, see THEORY & OPERATION article.
  8. Note ECM terminals. See Figure-Figure . Turn ignition on. Using voltmeter, check voltage between body ground and FC terminal at ECM. See ECM IDENTIFICATION FOR FUEL PUMP FC TERMINAL  table.
    ECM IDENTIFICATION FOR FUEL PUMP FC TERMINAL

    Application ECM Connector ECM Terminal No. (Wire Color)
    Camry E6 10 (Green/Red)
    Camry Solara E7 10 (Green/Red)
    Celica E2 3 (Green/Red)
    Corolla
    3-Speed A/T & M/T E6 14 (Green/Red)
    4-Speed A/T E10 3 (Green/Red)
    ECHO E4 14 (Green)
    Highlander E5 3 (Green/Red)
    MR2 E2 3 (Green/Red)
    Prius E8 9 (Green/Red)
    RAV4 E8 (1) 3 (Green/Red Or White)
    Tacoma E6 6 (White/Blue)
    (1) There are 2 different wiring harnesses used. Wire color at designated terminal may vary according to wiring harness used.
  9. Voltage should be 9-14 volts. If voltage is within specification, go to next step. On Camry, Camry Solara, Highlander, MR2, RAV4 and Tacoma, if voltage is not within specification, check for open in wiring harness and connectors between ECM and circuit opening relay, and between ignition switch and circuit opening relay. See WIRING DIAGRAMS article. On Celica, Corolla, ECHO and Prius, if voltage is not within specification, check for open in wiring harness and connectors between ECM and circuit opening relay, and between EFI main relay and circuit opening relay. See WIRING DIAGRAMS article. For EFI main relay location, see EFI MAIN RELAY  under MODULES, MOTORS, RELAYS & SOLENOIDS. On all models, if wiring harness or electrical connector is defective, repair as necessary.
  10. Check fuel pump resistance and operation. See FUEL DELIVERY  under FUEL SYSTEMS. If fuel pump resistance is within specification and fuel pump operates, go to next step. If fuel pump resistance is not within specification or fuel pump does not operate, replace fuel pump. See FUEL PUMP under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  11. Check for open in wiring harness and electrical connectors between circuit opening relay and fuel pump, and between fuel pump and body ground. See WIRING DIAGRAMS article. On Camry, Camry Solara, Highlander, MR2, RAV4 and Tacoma, also check for open in wiring harness and electrical connectors between circuit opening relay and EFI main relay. See WIRING DIAGRAMS article. For EFI main relay location, see EFI MAIN RELAY  under MODULES, MOTORS, RELAYS & SOLENOIDS. On all models, if wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connector is defective, repair as necessary.
  12. Check ECM ground circuit. See WIRING DIAGRAMS article. If ECM ground circuit is defective, repair ground circuit as necessary. If ECM ground circuit is okay, replace ECM. On Camry, Camry Solara, Highlander, MR2 and RAV4, if ECM is replaced and vehicle is equipped with engine immobilizer system, ECM must be programmed with proper ignition key code for engine immobilizer system. Models equipped with engine immobilizer system may be identified by looking at the ignition key. On models equipped with engine immobilizer system, the top of the ignition key is thicker than a standard ignition key, as a transponder chip is incorporated into the top of the ignition key. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.
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