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Home >> Toyota >> 2005 >> Corolla LE, Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics) >> DTC C1249/49: Open Circuit In Stop Light Switch Circuit >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assy, perform zero point calibration (see CALIBRATION ).
  1. CHECK STOP LAMP SWITCH OPERATION 
    1. Check that the stop light comes on when the brake pedal is depressed and goes off when the brake pedal is released.

    OK: Stop lamp switch function is normal. 

    HINT: Check the stop lamp bulb as it may have burnt out.

    1. NG: Go to step   3 . 
    2. OK: GO TO NEXT STEP. 
  2. INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (STP TERMINAL) 
    1. Disconnect the skid control ECU connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard: 

      SKID CONTROL ECU TERMINAL VOLTAGE

      Tester Connection Switch condition Specified Condition
      S1-27(STP)-Body ground Brake pedal depressed 8 to 14 V
      S1-27(STP)-Body ground Brake pedal released Below 1 V
      Fig 1: Identifying Skid Control ECU Terminal
      G02599775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   4 . 
    2. OK: GO TO NEXT STEP. 

      REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

  3. INSPECT STOP LAMP SWITCH ASSY 
    1. Disconnect the stop lamp switch assy connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      STOP LAMP SWITCH ASSY CONNECTOR TERMINALS RESISTANCE

      Switch condition Tester connection Specified condition
      Switch pin free 1-2 Below 1 Ω
      Switch pin pushed in 1-2 10 kΩ or higher
      Fig 2: Inspecting Stop Lamp Switch Assy
      G02599776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE STOP LAMP SWITCH ASSY 
    2. OK: GO TO NEXT STEP. 
  4. CHECK HARNESS AND CONNECTOR (STOP LAMP SWITCH - SKID CONTROL ECU) 
    1. Disconnect the stop lamp switch connector and skid control ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      STOP LAMP SWITCH AND SKID CONTROL ECU TERMINALS RESISTANCE

      Tester Connection Specified Condition
      S1-27 (STP)-S9-1 (STP) Below 1 Ω
    3. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SKID CONTROL ECU TERMINAL AND BODY RESISTANCE

      Tester Connection Specified Condition
      S1-27 (STP)-Body ground 10 kΩ or higher
      Fig 3: Identifying Stop Lamp Switch And Skid Control ECU Terminals
      G02599777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 

      REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

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