Fuel System (2UZ-FE): Inspection

WARNING: This page is about a different car, the 2004 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL INJECTOR ASSY
1. Inspect injector resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    Resistance: 13.4 to 14.2 Ω at 20°C (68°F)
  If the resistance is not as specified, replace the injector.
2. Inspect injector.
  CAUTION: Avoid any sparks or flame during the test.
  
  Fig 1: Inspecting Fuel Injector Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Obtain a new fuel main hose (part No. 23271-50190) and take the fuel tube connector out of the hose.
    
    Fig 2: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Install the fuel tube connector to SST (hose), then connect the tube connector and fuel pipe.
    SST 09268-41047 (95336-08070)
    
    CAUTION: Observe the precautions when connecting the fuel tube connector (quick type).
  3. Remove the pressure regulator from the delivery pipe.
  4. Install the O-ring to the fuel inlet of the pressure regulator.
    
    Fig 3: Installing Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Connect the SST (hose) to the fuel inlet of the pressure regulator with another SST (union) and the 2 bolts.
    SST 09268-41047 (95336-08070, 09268-41091)
    
    Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
  6. Connect the fuel return hose to the fuel outlet of the pressure regulator.
    
    Fig 4: Locating Pressure Regulator
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Install the O-ring to the injector.
  8. Connect SSTs (union and hose) to the injector, and hold the injector and union with another SST (clamp).
    SST 09268-41047 (09268-41110, 09268-41300, 95336-08070)
  9. Put the injector into a graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.
  10. Operate the fuel pump (see ON-VEHICLE INSPECTION ).
  11. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
    SST 09842-30070
    
    Volume: 56 to 69 cm ³ (3.4 to 4.2 cu in.) per 15 seconds Difference between each injector: 13 cm ³ (0.8 cu in.) or less
  If the injection volume is not as specified, replace the injector.
  
  Fig 6: Measuring Injection Volume With Graduated Cylinder Using SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for leakage.
  1. In the condition above, disconnect the tester probes of the SST (wire) from the battery and check for fuel leakage from the injector.
  SST 09842-30070
  
  Fuel drop: 1 drop or less per 12 minutes
  
  Fig 7: Checking Fuel Leakage From Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP RESISTER
1. Inspect fuel pump resistor resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    Resistance: 0.70 to 0.76 Ω at 20°C (68°F)
    
    Fig 8: Inspecting Fuel Pump Resister Using Ohmmeter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP
1. Inspect fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between terminals 1 and 2.
    
    Fig 9: Identifying Fuel Pump Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Resistance: 0.2 to 3.0 Ω at 20°C (68°F)
  If the resistance is not as specified, replace the fuel pump.
2. Inspect fuel pump operation.
  1. Connect the lead wire to the fuel pump.
  2. Connect the positive (+) lead from the battery to terminal 1 of the connector, and the negative (-) lead to terminal 2. Check that the fuel pump operates.
  NOTE:
  - These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
  - Keep the fuel pump as far away from the battery as possible.
  - Always switch on the battery side.
  Fig 10: Checking Fuel Pump Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the fuel pump dose not operate, replace the fuel pump and/or lead wire.
  1. Disconnect the lead wire from the fuel pump.

INSPECT RELAY

Check for continuity.

Using an ohmmeter, check if there is continuity between each terminal.

Fig 11: Checking Continuity Between Terminal

SPECIFIED CONDITION

Between terminals	Specified condition
1 - 2 3 - 4	Continuity
3-5	No continuity

Using an ohmmeter, check that there is continuity between terminals 3 and 5 when battery voltage is applied across terminals 1 and 2.
Specified condition: Continuity