LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 20 (Engine Control System & Component Testing - 4-Cylinder) >> Fuel Systems >> Fuel Control >> Fuel Injectors (Tacoma)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Injectors (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.
  1. To check for fuel injector operation, using stethoscope, listen for clicking sound at each fuel injector, or feel for fuel injector operation at fuel injector with engine cranking or with engine running. If fuel injector operation does not exist, check for loose connection at electrical connector for fuel injector. If electrical connector for fuel injector is okay, go to next step.
  2. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, check resistance between electrical terminals on fuel injector. Replace fuel injector if resistance is not within specification. See FUEL INJECTOR RESISTANCE  table. See FUEL RAILS & FUEL INJECTORS under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  3. If fuel injector operates and fuel injector resistance is within specification, go to next step. If fuel injector resistance is within specification but fuel injector does not operate, check wiring circuit to fuel injector. See WIRING DIAGRAMS article. If problem exists in fuel injector or wiring circuit and misfire exists, a Diagnostic Trouble Code (DTC) may be stored in Engine Control Module (ECM). See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieving of DTCs.
  4. To check fuel injector volume, remove fuel injector. See FUEL RAILS & FUEL INJECTORS under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article. Ensure area around fuel hoses on fuel filter is clean. Remove union bolts with gaskets, and disconnect fuel hose from fuel filter. See Fig 8.
  5. Install union, delivery hose, gaskets and union bolt from Fuel Injector Measuring Set (SST 09268-41047) on fuel filter. See Fig 8. Tighten union bolt to 21 ft. lbs. (29 N.m).
  6. Check that "O" ring is installed on top of fuel injector. Using clamp and union from fuel injector measuring set, connect fuel injector to delivery hose. See Fig 8.
  7. Remove fuel pressure regulator from fuel rail. See FUEL PRESSURE REGULATOR under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article. Using NEW "O" ring, install union on fuel pressure regulator. See Fig 8. Connect delivery hose to union and fuel return hose on fuel pressure regulator.
  8. Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  9. Connect Toyota hand-held tester to data link connector No. 3 at driver's side of instrument panel. See Figure. Turn ignition on and then turn hand-held tester on. Select ACTIVE TEST MODE on hand-held tester. Using hand-held tester manufacturer's instructions, activate fuel pump.
    NOTE: If hand-held tester is not available, fuel pump may also be operated to pressurize fuel system by applying battery voltage to electrical terminals on fuel pump. For operating of fuel pump, see appropriate FUEL PUMP RESISTANCE & OPERATION  procedure under FUEL DELIVERY under FUEL SYSTEMS.
  10. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. See Figure. Measure fuel injector volume. Test each fuel injector 2-3 times. Replace fuel injector if fuel injector volume is not within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS  table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS  table.
  11. Disconnect fuel injector tester. Ensure fuel leakage from end of fuel injector does not exceed one drop in 12 minutes. Replace fuel injector if leakage exceeds one drop in 12 minutes. Disconnect negative battery cable. Remove test equipment.
  12. Using NEW gaskets, install fuel hose on top of fuel filter. Tighten union bolt to 21 ft. lbs. (29 N.m). Reinstall fuel pressure regulator. Install negative battery cable. Check for fuel leaks by operating the fuel pump by using hand-held tester or connecting battery voltage to fuel pump.
FUEL INJECTOR RESISTANCE

Application Ohms @ 68°F (20°C)
Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, MR2, Prius & RAV4 13.40-14.20
Tacoma 12.00-16.00
FUEL INJECTOR VOLUME SPECIFICATIONS

Application cc (Cu. In.)
Volume
Camry 68-82 (4.1-5.0)
Camry Solara 69-82 (4.2-5.0)
Celica 47-58 (2.8-3.5)
Corolla 60-73 (3.7-4.5)
ECHO 47-58 (2.8-3.5)
Highlander 69-82 (4.2-5.0)
MR2 60-73 (3.7-4.5)
Prius 36-46 (2.1-2.8)
RAV4 53-65 (3.2-3.9)
Tacoma 71-86 (4.3-5.2)
Maximum Difference Between Each Fuel Injector
Camry & Camry Solara 14 (.85)
Celica 10 (.61)
Corolla 13 (.80)
ECHO 10 (.61)
Highlander & MR2 13 (.80)
Prius 10 (.61)
RAV4 6 (.37)
Tacoma 15 (.91)
Fig 1: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Celica)
G99B52374Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Corolla)
G98H11483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (ECHO)
G99D52376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Highlander)
G00020894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (MR2)
G00020882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 6: Locating Fuel Pipe & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Prius)
G00011396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 7: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (RAV4)
G00011392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 8: Connections For Testing Fuel Injector (Tacoma)
G98E11845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals