Fuel System (1GR-FE): Inspection

WARNING: This page is about a different car, the 2004 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL INJECTOR ASSY
1. Inspect injector resistance
  1. Using an ohmmeter, measure the resistance between the terminals.
    Resistance: 11.6 - 12.4 Ω at 20°C (68°F)
    
    If the resistance is not as specified, replace the injector.
2. Inspect injector
  CAUTION: Keep injector clear of sparks during the test.
  
  Fig 1: Inspecting Fuel Injector Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Obtain the new No.1 fuel pipe (part No. 23801-31070) and take out the fuel tube connector from the pipe.
    
    Fig 2: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Install the fuel tube connector to a SST (hose), then connect the tube connect and fuel pipe.
    SST 09268-41047 (95336-08070)
    
    Fig 3: Installing Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    CAUTION: Connect the fuel tube connector (quick type) after observing the precautions.
  3. Remove the pressure regulator from the delivery pipe.
  4. Install the O-ring to the fuel inlet of the pressure regulator.
  5. Connect the SST (hose) to the fuel inlet of the pressure regulator with another SST (union) and the 2 bolts.
    SST 09268-41047 (95336-08070, 09268-41091)
    
    Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf)
  6. Connect the fuel return hose to the fuel outlet of the pressure regulator.
  7. Install the O-ring to the injector.
  8. Connect SSTs (adaptor and hose) to the injector, and hold the injector and union with SST (clamp)
    SST 09268-41047 (09268-41140, 09268-41400, 95336-08070)
  9. Put the injector into a graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.
  10. Operate the fuel pump. (See ON-VEHICLE INSPECTION )
  11. Connect a 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 09842-30080
    
    Fig 6: Testing Injector Using SST
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Volume: 76 - 91 cm ³ (4.6 - 5.5 cu in.) per 15 seconds Difference between each injector: 15 cm ³ (0.9 cu in.) or less
    
    If the injection volume is not as specified, replace the injector.
3. Inspect leakage
  1. In the condition above, disconnect the tester probes of the SST (wire) from the battery and check the fuel leakage from the injector.
    SST 09842-30080
    
    Fuel drop: 1 drop or less per 12 minutes
    
    Fig 7: Checking Fuel Leakage From Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP RESISTER
1. Inspect the fuel pump resistor resistance.
  1. Using an ohmmeter, measure the resistance between terminal.
    Resistance: 0.70 - 0.76 Ω at 20°C (68°F)
    
    Fig 8: Measuring Resistance Between Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL PUMP
1. Inspect fuel pump resistance.
  1. Using an ohmmeter, measure the resistance between terminals 4 and 5.
    Resistance: 0.2 - 3.0 Ω at 20°C (68°F)
2. Inspect fuel pump operation
  1. Apply the 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.

INSPECT FUEL PUMP RELAY ASSY

Fig 10: Inspecting Fuel Pump Relay Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Continuity inspection.

Using the ohmmeter, check that there is continuity between each terminal.

SPECIFIED CONDITION

Between terminals	Specified condition
1 - 2 3 - 4	Continuity
3 - 5	No continuity

Using the ohmmeter, check that there is continuity between terminals 3 and 5 when the battery voltage is applied across terminals 1 and 2.
Specified condition: Continuity