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 D. at 20°C (68°F)
  Fig 1: Identifying Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect injector inspection
  CAUTION: Keep injector clear of sparks during the test.
  1. Purchase a new fuel tube, and take out the fuel tube connector from its tube.
    HINT:
    
    Part No. 23901-0D010
    
    Fig 2: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect SST and fuel tube connector to the fuel pipe.
    SST 09268-41047 (90467-13001, 95336-08070)
    
    CAUTION: Perform connecting operations of the fuel tube connector (quick type) after observing the precautions.
    
    Fig 3: Connecting SST And Fuel Tube Connector To Fuel Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Install an O-ring to the fuel injector.
  4. Connect SST (union and hose) to fuel the injector, and hold the fuel injector to prevent gasoline from splashing out. (See FUEL SYSTEM )
    SST 09268-41047 (90467-13001, 95336-08070, 09268-41 110, 09268-41300)
    
    Fig 4: Connecting SST To Fuel Injector And Holding Fuel Injector To Prevent Gasoline From Splashing Out
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Put the fuel injector into a graduated cylinder.
    HINT:
    
    Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.
  6. Operate the fuel pump.
  7. Connect SST to the connector of fuel injector.
    SST 09842-30080
  8. Connect SST to the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test the each fuel injector 2 or 3 time.
  Injection volume:
  
  60 - 73 cm3 (3.7 - 4.5 cu in.) per 15 seconds
  
  Difference between each injector:
  
  13 cm3 (0.8 cu in.) or less
  
  Fig 5: Connecting SST To Battery And Measuring Injection Volume With A Graduated Cylinder
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect leakage
  1. In the condition above, disconnect the test probes of the from the battery, and check the fuel leakage from the fuel injector.
  Fuel drop: 1 drop or less per 12 minutes
Fig 6: Inspecting Leakage
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
FUEL PUMP
1. Inspect fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between the 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: Identifying Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002