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HOMESERVICE MANUALSTOYOTA2009YARIS S, 4D HATCHBACKREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTEXTERIOR LIGHTSLIGHTING SYSTEMTURN SIGNAL FLASHER ASSEMBLYON-VEHICLE INSPECTION
2009 Toyota Yaris S, 4D Hatchback

On-Vehicle Inspection

2009 Toyota Yaris S, 4D HatchbackSECTION On-Vehicle Inspection
  1. INSPECT TURN SIGNAL FLASHER CIRCUITΒ 
    1. Check the power source circuit and ground circuit.
      1. Remove the turn signal flasher relay from the main body ECU.
      2. Measure the voltage and check the results in accordance with the value(s) in the table below.

        Standard VoltageΒ 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        1 - Body ground Ignition switch OFF 0V
        1 - Body ground Ignition switch ON 11 to 14 V
        4 - Body ground Always 11 to 14 V
      3. Measure the resistance and check the result in accordance with the value(s) in the table below.
        Fig 1: Identifying Turn Signal Flasher Relay
        G04833001Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

        Standard ResistanceΒ 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        7 - Body ground Always Below 1 Ξ©
    2. Check the output operation signal.
      1. Install the turn signal flasher relay onto the main body ECU.
        Fig 2: Identifying Terminals Of Turn Signal Flasher Relay
        G04833002Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the voltage and check the results in accordance with the values in the table below.

        StandardΒ 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        4A-27 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4A-27 - Body ground Turn signal switch (left turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4A-28 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4A-28 - Body ground Turn signal switch (right turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4B-14 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4B-14 - Body ground Turn signal switch (left turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4B-31 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4B-31 - Body ground Turn signal switch (right turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4S-11 - Body ground Turn signal switch (left turn) OFF β†’ ON 11 to 14 V β†’ 0V
        4S-12 - Body ground Turn signal switch (right turn) OFF β†’ ON 11 to 14 V β†’ 0V
        4S-13 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4S-13 - Body ground Turn signal switch (left turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4S-16 - Body ground Hazard warning switch OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4S-16 - Body ground Turn signal switch (right turn) OFF β†’ ON 0 V β†’ 11 to 14 V (60 to 120 times per minute)
        4S-17 - Body ground Hazard warning switch OFF β†’ ON 11 to 14 V β†’ 0V
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
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