Fuel Injector: Inspection

WARNING: This page is about a different variant/trim than selected.

INSPECT FUEL INJECTOR ASSEMBLY
1. Measure the resistance between the injector terminals.
  Standard resistance:
  
  11.6 to 12.4 Ω at 20°C (68°F)
  
  If the result is not as specified, replace the injector.
  
  Fig 1: Measuring Resistance Between Injector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the injector injection.
  CAUTION: Keep the injector away from sparks during the test.
  1. Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (vehicle side).
    SST 09268-31012 (09268-41500, 90467-13001, 95336-08070)
  2. Install the O-ring to the fuel injector.
    
    Fig 2: Identifying Fuel Tube Connector With SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).
    SST 09268-31012 (95336-08070, 09268-41110, 09268-41130, 09268-41400)
  4. Put the injector into the graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector that will contain gasoline spray.
    
    Fig 3: Connecting SST (Adapter And Hose) To Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Operate the fuel pump.
  6. 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.
    SST 09842-30080
    
    Standard injection volume:
    
    76 to 92 cm ³ (4.6 to 5.6 cu in.) per 15 seconds
    
    Standard difference between each injector:
    
    16 cm ³ (1.0 cu in.) or less
    
    Fig 4: Measuring Injection Volume With Graduated Cylinder
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect for fuel leaks.
  1. 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: Checking Fuel Leakage From Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch off.
  3. Disconnect the cable from the negative (-) battery terminal.
  4. Remove SST.
  5. Disconnect the Techstream from the DLC3.
  6. Reconnect the fuel inlet hose (rear fuel pipe) to the fuel main tube.