Section 431 (Engine Fuel System (1GR-FE)): Inspection

WARNING: This page is about a different car, the 2003 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 inspection
  1. Obtain the new No.1 fuel pipe (part No. 23801 - 31070) and take out the fuel tube connector from the pipe.
    
    Fig 2: Taking Out Fuel Tube Connector From Pipe
    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)
  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.
    
    Fig 4: Connecting SST (Hose) To Fuel Inlet Of Pressure Regulator With Another SST (Union)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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.
    
    Fig 5: Installing O-Ring To Injector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. Connect SSTs (adaptor and hose) to the injector, and hold the injector and union with SST (clamp)
    
    Fig 6: Connecting SST (Wire) To Injector And Battery
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    SST 09268-41047 (09268-41140, 09268-41400, 95336-08070)
  9. Put the injector into a graduated cylinder.
  10. Operate the fuel pump. (See ON-VEHICLE INSPECTION )
  11. Connect an 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
    
    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.
    
    Fig 7: Inspecting Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    SST 09842 - 30080
INSPECT FUEL PUMP RESISTER
1. Inspect the fuel pump resistor resistance.
  1. Using an ohmmeter, measure the resistance between terminal.
    Fuel drop: 1 drop or less per 12 minutes
    
    Fig 8: Inspecting Fuel Pump Resistor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Resistance: 0.70 - 0.76 Ω at 20°C (68°F)

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 9: Inspecting Fuel Pump

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.

INSPECT FUEL PUMP RELAY ASSY

Continuity inspection.

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

Fig 10: Inspecting Fuel Pump Relay Assy

FUEL PUMP RELAY TERMINALS SPECIFIED CONDITION

Between Terminals	Specified Condition
1 - 2	Continuity
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