Fuel Injector: Inspection

INSPECT FUEL INJECTOR ASSEMBLY

Inspect the injector resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1-2	Always	11.6 to 12.4 Ω at 20°C (68°F)

If the resistance is not as specified, replace the injector.

Inspect the injection volume.

Fig 1: Inspecting Fuel Injector Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CAUTION: This test involves high-pressure fuel and electricity. Take every precaution regarding the safe handling of both fuel and electricity. Perform this test in a safe area, and avoid any sparks or flames. Do not smoke.
1. Install the fuel tube connector to SST (hose), then connect the tube connector to the fuel pipe (vehicle side).
  SST 09268-31011 (09268-41500, 90467-13001, 95336-08070)
  
  NOTE: Do not scratch or allow any foreign matter on the connection between the fuel tube connector and the pipe, as they are sealed with the O-ring on the SST connector.
2. Install the O-ring to the fuel injector.
  
  Fig 2: Connecting Tube Connector To Fuel Pipe
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).
  SST 09268-31011 (90467-13001, 95336-08070), 09268-41140, 09268-41400
4. Put the injector into the graduated cylinder.
  CAUTION: Install a suitable vinyl tube onto the injector that will contain gasoline spray.
5. Operate the fuel pump (See ON-VEHICLE INSPECTION ).
  
  Fig 3: Connecting SST (Adaptor And Hose) To Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
  SST 09842-30080
  
  Volume:
  
  84 to 100 cm ³ (5.1 to 6.0 cu in.) in 15 seconds
  
  Difference between each injector:
  
  16 cm ³ (0.98 cu in.) or less
  
  If the injection volume is not as specified, replace the injector.
  
  Fig 4: Connecting SST (Wire) To Injector And Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check for leaks.
1. Disconnect the tester probes of SST (wire) from the battery and check for fuel leaks from the injector.
  Fuel drop:
  
  1 drop or less in 16 minutes
  
  Fig 5: Identifying Fuel Leakage From Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002