Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2009YARIS S, 4D HATCHBACKREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYENGINE FUEL SYSTEMFUEL INJECTORINSPECTION

2009 Toyota Yaris S, 4D Hatchback

Fuel Injector: Inspection

2009 Toyota Yaris S, 4D HatchbackSECTION Inspection

INSPECT FUEL INJECTOR ASSEMBLY
1. Check the resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    Standard resistance: 11.6 to 12.4 Ω at 20°C (68°F)
    
    If the result is not as specified, replace the injector assembly.
    
    Fig 1: Measuring Resistance Between Fuel Injector Assembly Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the operation.
  CAUTION: Perform the inspection in a well-ventilated area. Do not perform the inspection near any naked flames.
  1. Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (vehicle side).
    SST 09268-31012 (90467-13001, 95336-08070, 09268-41500)
  2. Install the O-ring onto the fuel injector assembly.
    
    Fig 2: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Connect SST (adaptor and hose) to the injector assembly, and hold the injector assembly and union with SST (clamp).
    SST 09268-31012 (09268-41110, 90467-13001, 95336-08070, 09268-41310)
    
    Fig 3: Connecting SST To Injector Assembly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Set the injector assembly in a graduated cylinder.
    CAUTION: Install a suitable vinyl tube onto the injector assembly to prevent gasoline splashes.
  5. Operate the fuel pump (see ON-VEHICLE INSPECTION ).
  6. Connect SST (wire) to the injector assembly 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
    
    Injection volume: 47 to 58 cm ³ (2.9 to 3.5 cu in.) per 15 seconds
    
    Difference between each injector: 11 cm ³ (0.6 cu in.) or less
    
    NOTE: Always do the switching at the battery side.
    
    If the injection volume is not as specified, replace the injector assembly.
    
    Fig 4: Connecting SST (Wire) To Injector Assembly
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the leakage.
  1. In the condition above, disconnect the test probes of SST (wire) from the battery and check the injector for fuel leakage.
    Fuel drop: 1 drop or less every 12 minutes
    
    Fig 5: Checking Injector For Fuel Leakage
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.