Section 714 (Engine Fuel System (3MZ-FE)): Inspection

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL INJECTOR ASSY
1. Check the injector resistance.
  1. Measure the resistance between the terminals.
    Standard: 13.4 to 14.2 Ω at 20°C (68°F)
  If the result is not as specified, replace the injector.
2. Check the injector injection.
  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 flame.
  - Do not smoke.
  1. Purchase the new fuel tube and take out the fuel tube connector from its pipe.
    Fuel tube: Parts No. 23801-20190
    
    Fig 1: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Connect SST and the fuel tube connector to the fuel pipe.
    SST 09268-41047
    
    CAUTION: Always read the precautions (see PRECAUTION ) before connecting the fuel tube connector (quick type).
    
    Fig 2: Connecting Fuel Tube Connector With SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Install the O-ring to the injector.
  4. Connect SST (union and hose) to the injector, and hold the injector and the union with SST (clamp)
    SST 09268-41047 (09268-41110, 09268-41300)
  5. Put the injector into a graduated cylinder.
    HINT:
    
    Install a suitable vinyl tube onto the injector to contain the gasoline spray.
  6. Operate the fuel pump (see ON-VEHICLE INSPECTION ).
    
    Fig 3: Installing O-Ring, Clamp, Hose & Vinyl Tape
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.
  SST 09842-30070
  
  Fig 4: Connecting SST To Injector & Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Injection Volume Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Always turn on and off the voltage on the battery side, not the fuel pump side.
  
  If the result is not as specified, replace the injector.
3. Check fuel 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: Checking Fuel Leakage
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP
1. Check the fuel pump resistance.
  1. Measure the resistance between the terminals.
    Standard: 0.2 to 3.0 Ω at 20°C (68°F)
  If the result is not as specified, replace the fuel pump assy.
  
  Fig 7: Measuring Resistance Between Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check fuel pump operation.
  1. Apply battery voltage to both the terminals. Check that the pump operates.
  NOTE:
  - These tests must be done within 10 seconds to prevent the coil from burning out.
  - Keep fuel pump as far away from the battery as possible.
  - Always turn on and off the voltage on the battery side, not the fuel pump side.
  If the pump does not operate, replace the fuel pump assy.