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HOMESERVICE MANUALSTOYOTA201886 GT, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEADLIGHTSLIGHTING SYSTEM (EXT) (SERVICE INFORMATION)STOP LIGHT SWITCHADJUSTMENT [06/2016 - ]PROCEDURE
2018 Toyota 86 GT, Standard Trans

Adjustment [06/2016 - ]: Procedure

2018 Toyota 86 GT, Standard TransSECTION Procedure
  1. CHECK THE DATA LIST FOR STOP LIGHT SWITCH ASSEMBLY 
    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / Stop Light SW and Master Cylinder Pressure Sensor 1 (Refer to DATA LIST / ACTIVE TEST [06/2016 - ] ).
    5. Without the brake pedal depressed, check that the Data List "Stop Light SW" is "OFF."

      HINT: 

      If the Data List display is "ON", check and adjust the stop light switch assembly installation position.

    6. Depress the brake pedal slowly, and check that the Data List "Master Cylinder Pressure Sensor 1" is within the standard value when the Data List "Stop Light SW" is turned "ON".

      Standard pressure

      0.08 to 0.27 MPa (0.81 to 2.75 kgf/cm2 , 11 to 39 psi)

      HINT: 

      If the Data List display is outside the standard value, check and adjust the stop light switch assembly installation position.

    7. Check for DTCs.

      HINT: 

      If DTC C1249 is output, check and adjust the stop light switch assembly installation position.

  2. CHECK THE STOP LIGHT SWITCH ASSEMBLY INSTALLATION POSITION 
    1. Measure dimension A in the illustration when the vehicle is brought in.
      GTY386601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Perform the measurement before removing the stop light switch assembly.

      TEXT IN ILLUSTRATION

      *a Stop light switch assembly installed
      (When vehicle is brought in.)
  3. ADJUST STOP LIGHT SWITCH ASSEMBLY 
    1. Measure dimension B after installing the stop light switch assembly, and make adjustment so that it is larger than dimension A.
      GTY389145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard

      B - A = 1.0 to 2.0 mm (0.039 to 0.079 in.)

      TEXT IN ILLUSTRATION

      *a Stop light switch assembly installed
      (After Adjustment)
    2. After adjusting, check the value for the "Master Cylinder Pressure Sensor 1" on the Data List. If the value is outside the standard value, perform procedure (a) again.

      Standard pressure

      0.08 to 0.27 MPa (0.81 to 2.75 kgf/cm2 , 11 to 39 psi)

      HINT: 

      The installation position for the stop light switch assembly is adjustable by each thread pitch (approximately 1 mm) of the screw.

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.