Home ReviewsRefund
Home/Toyota/RAV4/Toyota RAV4 II (2000-2003)/Repair manual/Engine Controls - System & Component Testing - 4-CYLINDER/FUEL PUMP CONTROL CIRCUIT
Contents Wiring diagrams Section: Engine Controls - System & Component Testing - 4-CYLINDER All sections

FUEL PUMP CONTROL CIRCUIT Toyota RAV4 II

Engine Controls - System & Component Testing - 4-CYLINDER ~960 words

FUEL PUMP CONTROL CIRCUIT

CAUTIONIf Engine Control Module (ECM) replacement is instructed in the following testing, always ensure ECM wiring harness electrical connector and ground circuit are okay. If either are defective, repair and repeat testing to confirm ECM malfunction.
WARNINGOn Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
  1. If using Toyota hand-held tester, 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»(ref-63407-S20016928132001020500000) table.
  4. Note ECM terminals. (Scheme 109)- (Scheme 118). 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»(ref-63407-S26957518932001020500000) table. On Camry gasoline models and Camry Solara, feel for fuel pressure in fuel inlet line at fuel filter when fuel inlet line is pinched closed. On 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 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»(ref-63407-S19590243722001020500000). 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»(ref-63407-S04619833102001020500000) 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»(ref-63407-S20016928132001020500000) table. ENGINE CONTROL MODULE LOCATION Model (1) Location Camry Gasoline Models & 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. (Scheme 109)- (Scheme 118). Turn ignition on. Using voltmeter, check voltage between body ground and FC terminal at ECM. See «ECM IDENTIFICATION FOR FUEL PUMP FC TERMINAL»(ref-63407-S26957518932001020500000) table. ECM IDENTIFICATION FOR FUEL PUMP FC TERMINAL Application ECM Connector ECM Terminal No. (Wire Color) Camry Gasoline Models & Camry Solara E7 3 (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 gasoline models, Camry Solara, Highlander, MR2 and RAV4, 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. For EFI main relay location, see «EFI MAIN RELAY»(ref-63407-S26453184222001020500000) under MODULES, MOTORS, RELAYS & SOLENOIDS. On Celica, Corolla, ECHO, Prius and Tacoma, 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»(ref-63407-S26453184222001020500000) 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»(ref-63407-S31016737032001020500000) 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.
  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 gasoline models, Camry Solara, Highlander, MR2 and RAV4, 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»(ref-63407-S26453184222001020500000) 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 gasoline models, 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.