Fuel Injector: Inspection

INSPECT FUEL INJECTOR ASSEMBLY
1. Inspect injector resistance.
  1. Measure the resistance between the terminals.
    Standard resistance: 11.6 to 12.4 Ω at 20°C (68°F)
    
    If the result is not as specified, replace the injector.
2. Inspect the injection volume.
  CAUTION: This test involves high-pressure fuel and electricity. Take every precaution 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.
  1. Install the fuel tube connector to SST (hose), then connect the tube connector to the fuel pipe (vehicle side).
    SST 09268-41048 (95336-08070, 09268-41500)
    
    Fig 1: Installing Fuel Tube Connector To SST (Hose)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Install the O-ring to the fuel injector.
  3. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).
    SST 09268-41048 (09268-41130, 90467- 13001), 09268-41400
  4. Put the injector into the graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.
    
    Fig 2: Installing O-Ring To Fuel 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 volume: 84 to 100 cm ³ (5.1 to 6.0 cu in.) in 15 seconds
    
    Difference between each injector: 16 cm ³ (0.96 cu in.) or less
    
    If the injection volume is not as specified, replace the injector.
    
    Fig 3: Measuring Injection Volume With Graduated Cylinder
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. 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 16 minutes
    
    Fig 4: Checking For Fuel Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002