Fuel System: Inspection

Fuel injector assy.
1. Inspect injector resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    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.
  1. Purchase the new No. 1 fuel pipe and take out the fuel tube connector from its pipe.
    NOTE: Part No. 23801-20150
    
    Fig 1: Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect SST and fuel tube connector to the fuel pipe.
    SST 09268-41047 (95336-08070)
    
    CAUTION: Perform connecting operations of the fuel tube connector (quick type) after observing the precautions.
    
    Fig 2: Displaying SST & Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Install the grommet and O-ring to the injector.
  4. Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp)
    SST 09268-41047 (09268-41110, 09268-41300, 95336-08070)
  5. Put the injector into a graduated cylinder.
    NOTE: Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.
  6. Operate the fuel pump. See ON-VEHICLE INSPECTION .
    
    Fig 3: Displaying Injector Components
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Connect 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
    
    Injection volume:
    
    Fig 4: Connecting SST To Injector & Battery
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 5: Displaying Injector Specifications
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE: Always do the switching at the battery side.
    
    If the injection volume is not as specified, replace the injector.
2. Inspect leakage.
  1. In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector.
  Fuel drop: 1 drop or less per 12 minutes
  
  Fig 6: Inspecting Injector For Leakage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fuel pump assy.
1. Inspect fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between terminals.
  Resistance: 0.2-3.0 Ω at 20°C (68°F)
2. Inspect fuel pump operation.
  1. Apply battery voltage to both terminals. Check that the pump operates.
  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.
Fig 7: Inspecting Fuel Pump Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002