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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Abs With EBD & BA & TRAC & VSC System - Diagnostics >> DTC C1249/49: Open Circuit In Stop Light Switch Circuit >> Inspection Procedure

Inspection Procedure

  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.

      HINT:

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

      Standard: Stop lamp switch function is normal. 

    1. NG: Go to step   4 . 
    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: 

      SPECIFICATION TESTER CONNECTION

      Tester Connection Switch condition Specified Condition
      S27-27 (STP) -Body ground Brake pedal depressed 8 to 14 V
      S27-27 (STP) -Body ground Brake pedal released Below 1 V
      Fig 1: Inspecting Skid Control ECU Terminal Voltage (STP Terminal)
      G02908673Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   5 . 
    2. OK: GO TO NEXT STEP. 
  3. RECONFIRM PTC 
    1. Clear the DTCs (see PRE-CHECK ).
    2. Turn the ignition switch to the ON position.
    3. Are the same DTCs detected? (see PRE-CHECK ).
    1. NO: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. YES: REPLACE ABS & TRACTION ACTUATOR ASSY (See  REPLACEMENT  ) 
  4. 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: 

      SPECIFICATION TESTER CONNECTION

      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 Assembly
      G02908674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE STOP LAMP SWITCH ASSY 
    2. OK: GO TO NEXT STEP. 
  5. 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: 

      SPECIFICATION TESTER CONNECTION

      Tester Connection Specified Condition
      S27-27 (STP) - S15-1 (STP) Below 1 Ω
      Fig 3: Checking Harness And Connector (Stop Lamp Switch - Skid Control ECU)
      G02908675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (See  REPLACEMENT  ) 
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