FUEL INJECTOR (for Port Injection): Inspection

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL INJECTOR ASSEMBLY
1. Inspect injector resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    Standard resistance:
    
    11.6 to 12.4Ω at 20°C (68°F)
    
    If the resistance is not as specified, replace the injector.
    
    Fig 1: Identifying Fuel Injector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the injection volume.
  CAUTION: This test involves high-pressure fuel and electricity. Take all precautions regarding safe handling of both the fuel and the electricity. Perform this test in a safe area, and avoid any sparks or flames. Do not smoke.
3. Remove the fuel pipe clamp.
  
  Fig 2: Locating Fuel Pipe Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Disconnect the fuel tube.
  
  Fig 3: Disconnecting Fuel Tube
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Connect the SST to the fuel pipe (the vehicle side).
  SST 09268-31012 (09268-41500, 90467-13001, 95336-08070)
6. Install the O-ring to the fuel injector.
  
  Fig 4: Identifying SST And Fuel Pipe (Vehicle Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Install the SST and tube to the fuel injector.
  SST 09268-31012 (90467-13001, 09268-41300, 09268-41160)
  
  Fig 5: Installing SST And Tube To Fuel Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Put the injector into a graduated cylinder.
  SST 09842-30090
  
  CAUTION: Install a strong rubber tube onto the injector to prevent gasoline from splashing.
  
  Fig 6: Connecting SST (Wire) To Injector And Battery For 15 Seconds
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. Operate the fuel pump (turn the engine switch on (IG)).
10. 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.
  Injection volume:
  
  72.3 to 75.2 cm ³ (4.4 to 4.6 cu in.) per 15 seconds
  
  If the injection volume is not as specified, replace the injector.
11. Check for leakage.
1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check for fuel leakage from the injector.
  Fuel drop:
  
  1 drop or less in 24 minutes
  
  Fig 7: Checking For Fuel Leakage From Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002