On-Vehicle Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION On-Vehicle Inspection
WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT TURN SIGNAL FLASHER OPERATION 
    1. Power source circuit and ground circuit inspection.
      1. Remove the turn signal flasher relay from the instrument panel junction block assy.
      2. Measure the voltage according to the value(s) in the table below.

        Standard: 

        TESTER CONNECTION

        Tester connection Condition Specified condition
        1 - Body ground Ignition switch ON 10 to 14 V
        4 - Body ground Always 10 to 14 V
      3. Measure the resistance according to the value(s) in the table below.

        Standard: 

        TESTER CONNECTION

        Tester connection Condition Specified condition
        7 - Body ground Always Below 1 Ω
        Fig 1: Identifying Turn Signal Flasher Relay
        G03629617Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Output operation signal inspection.
      1. Install the turn signal flasher relay to the instrument panel junction block assy.
      2. Measure the voltage according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION

      Tester connection Condition Specified condition
      1A-14 - Body ground Hazard warning switch OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1A-14 - Body ground Turn signal switch (left turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1A-31 - Body ground Hazard warning switch OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1A-31 - Body ground Turn signal switch (right turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1D-27 - Body ground Hazard warning signal OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1D-27 - Body ground Turn signal switch (left turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1D-28 - Body ground Hazard warning signal OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1D-28 - Body ground Turn signal switch (right turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1L-11 - Body ground Turn signal switch (left turn) OFF --> ON Above 9 V --> 0 V
      1L-12 - Body ground Turn signal switch (right turn) OFF --> ON Above 9 V --> 0 V
      1L-13 - Body ground Hazard warning switch OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1L-13 - Body ground Turn signal switch (left turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1L-16 - Body ground Hazard warning switch OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1L-16 - Body ground Turn signal switch (right turn) OFF --> ON 0 V --> 0 <--> above 9 V (60 to 120 times per minutes)
      1L-17 - Body ground Hazard warning switch OFF --> ON Above 9 V --> 0 V
      Fig 2: Identifying Instrument Panel Junction Block
      G03629618Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. REAR COMBINATION LAMP 
    1. Measure the voltage according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION

      Tester connection Condition Specified condition
      2 - 5 Brake pedal released Below 1 V
      2 - 5 Brake pedal depressed 10 to 14 V
      Fig 3: Identifying Wire Harness View R10
      G03629619Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. HIGH MOUNTED STOP LAMP 
    1. Measure the voltage according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION

      Tester connection Condition Specified condition
      1 - 2 Brake pedal released Below 1 V
      1 - 2 Brake pedal depressed 10 to 14 V
      Fig 4: Identifying Wire Harness View H19
      G03629620Courtesy 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.