Fuel Injector: Inspection

INSPECT FUEL INJECTOR ASSEMBLY
1. Measure the resistance between the injector terminals.
  Standard resistance:
  
  13.4 to 14.2 Ω at 20°C (68°F)
  
  If the result is not as specified, replace the injector.
  
  Fig 1: Identifying Fuel Injector Assembly Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the injector injection.
  CAUTION: Keep the injector away from sparks during the test.
  1. Disconnect the fuel inlet hose (rear fuel pipe) from the fuel main tube.
  2. Install SST to the fuel main tube.
    SST 09268-31011 (90467-13001, 95336-08070, 09268-41110, 09268-41300, 09268-52011)
  3. Install the O-ring to the fuel injector.
    
    Fig 2: Identifying O-Ring To Fuel Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).
    SST 09268-31011 (90467-13001, 09268-41110, 09268-41300)
  5. Put the injector into the graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.
  6. Operate the fuel pump.
    
    Fig 3: Identifying SST (Adapter And Hose) To Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
    Standard injection volume:
    
    60 to 73 cm ³ (3.7 to 4.5 cu in.) per 15 seconds
    
    Difference between each injector:
    
    13 cm ³ (0.8 cu in.) or less
    
    Fig 4: Connecting SST To Battery
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the fuel leakage.
  1. In the condition above, disconnect the SST (wire) tester probes from the battery and check the fuel leakage from the injector.
    Standard fuel drop:
    
    1 drop or less per 12 minutes
    
    Fig 5: Identifying Fuel Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002