Fuel System: Inspection

INSPECT FUEL INJECTOR ASSY
1. Inspect the injector resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
  Resistance: 13.4 to 14.2 Ω at 20°C (68°F)
  
  If the resistance is not as specified, replace the injector.
2. Inspect the injector operation.
  CAUTION:
  - This test involves high-pressure fuel and electricity.
  - Take every precaution to ensure safe handling of both the fuel and electricity.
  - Perform this test in a safe area, and avoid any sparks or flame.
  - Do not smoke.
  1. Pull out the connector from a new fuel tube.
    HINT:
    
    Part No. 23901-21060
    
    Fig 1: Identifying Fual Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect SST and the fuel tube connector to the fuel pipe.
    SST 09268-41047 (95336-08070)
    
    CAUTION: After taking the precaution, connect the fuel tube connecter (quick type).
    
    Fig 2: Connecting SST And Fuel Tube Connector To Fuel Pipe
    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 (95336-08070, 09268-41110, 09268-41300), 09842-30080
  5. Put the injector into a graduated cylinder.
    HINT:
    
    Install a suitable vinyl tube to the injector to prevent or contain the gasoline spray.
    
    Fig 3: Connecting SST To Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Operate the fuel pump. (See ON-VEHICLE INSPECTION )
  7. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
  SST 09842-30080
  
  Injection volume:
  
  Fig 4: Injection Volume Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Connecting SST (Wire) To Injector And Battery
  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.
3. Inspect the 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 in 12 minutes
  
  Fig 6: Inspecting Injector For Leakage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP ASSY
1. Inspect the fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between terminals.
  Resistance: 0.2 to 3.0 Ω at 20°C (68°F)
2. Inspect the fuel pump operation.
  1. Apply battery voltage between terminals. Check that the pump operates.
Fig 7: Identifying Fuel Pump Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- These tests must be done quickly (within 10 seconds) to prevent coil burnout.
- Keep fuel pump as far away from the battery as possible.
- Away do the switching at the battery side.
If the operation is not as specified, replace the fuel pump.