Fuel System (2UZ-FE): Inspection

INSPECT FUEL INJECTOR ASSY
1. Inspect injector resistance
  1. Using an ohmmeter, measure the resistance between the terminals.
  1. Resistance:13.4 - 14.2 Ω at 20°C (68°F)
  If the resistance is not as specified, replace the injector.
2. Inspect injector inspection
  CAUTION: Keep injector clear of sparks during the test.
  
  Fig 1: Inspecting Fuel Injector Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Obtain the new fuel main hose (part No. 23271 -50190) and take out the fuel tube connector from the hose.
    
    Fig 2: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Install the fuel tube connector to a SST (hose), then connect the tube connect and fuel pipe.
    SST 09268-41047 (95336-08070)
    
    CAUTION: Perform connecting operations of the fuel tube connector (quick type) after observing the precautions.
  3. Remove the pressure regulator from the delivery pipe.
    
    Fig 3: Installing Fuel Tube Connector To SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Install the O-ring to the fuel inlet of the pressure regulator.
  5. Connect the SST (hose) to the fuel inlet of the pressure regulator with another SST (union) and the 2 bolts.
    
    Fig 4: Connecting SST To Fuel Inlet Of Pressure Regulator With Another SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    SST 09268-41047 (95336-08070, 09268-41091)
    1. 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.
  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 Page 11 -5)
    
    Fig 5: Installing O-Ring To Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Connect a SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.
  SST 09842-30070
  1. Volume: 56 - 69 cm ³(3.4 - 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: Connecting SST To Injector And Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect leakage
  1. In the condition above, disconnect the tester probes of the SST (wire) from the battery and check the fuel leakage from the injector.
  SST 09842-30070
  1. Fuel drop: 1 drop or less per 12 minutes
  Fig 7: Identifying Fuel Drop
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP RESISTER
1. Inspect the fuel pump resistor resistance.
  1. Using an ohmmeter, measure the resistance between terminal.
  1. Resistance: 0.70 - 0.76 Ω at 20°C (68°F)
  Fig 8: Measuring Resistance Between Terminal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP
1. Inspect fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between terminals 4 and 5.
  1. Resistance: 0.2 - 3.0 Ω at 20°C (68°F)
2. Inspect fuel pump operation
  1. Apply the battery voltage to both terminals. Check that the pump operates.
  Fig 9: Applying Battery Voltage To Both Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
- Keep fuel pump as far away from the battery as possible.
- Always do the switching at the battery side.
INSPECT FUEL PUMP RELAY ASSY
1. Continuity inspection.
  1. Using the ohmmeter, check that there is continuity between each terminal.
    Specified condition:
    
    Fig 10: Specified Condition Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using the ohmmeter, check that there is continuity between terminals 3 and 5 when the battery voltage is applied across terminals 1 and 2.
    Specified condition: Continuity
    
    Fig 11: Checking Continuity Between Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002