Fuel Injector: Inspection: Inspection

INSPECT FUEL INJECTOR ASSEMBLY

Inspect the injector resistance.

Fig 1: Identifying Resistance Of Fuel Injector Assembly Using Ohmmeter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

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.
WARNING:
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).
  
  Fig 2: Identifying SST(s) (Hose & Tube Connector), Fuel Tube & Clip
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - SST: 09268-31012
    - 09268-41500
    - 90467-13001
    - 95336-08070
2. Install the O-ring to the fuel injector sub-assembly.
3. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).
  
  Fig 3: Connecting SST (Adaptor & Hose) To Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - SST: 09268-31012
    - 90467-13001
    - 95336-08070
  - SST: 09268-41140
  - SST: 09268-41400
4. Put the injector into the graduated cylinder.
  WARNING:
  Install a suitable vinyl tube onto the injector to contain gasoline spray.
5. Operate the fuel pump. Refer toON-VEHICLE INSPECTION - Step 1 .
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.
  
  Fig 4: Connecting SST To Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - SST: 09842-30080
  Volume
  
  84 to 100 cm³ (5.1 to 6.0 cu in.) in 15 seconds
  
  Difference between each injector
  
  16 cm³ (0.98 cu in.) or less
  
  If the injection volume is not as specified, replace the injector.
Check for leakage.

Fig 5: Checking Fuel Leakage From Injector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check for fuel leakage from the injector.
  Fuel drop
  
  1 drop or less in 16 minutes