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Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> DTC C1249/49 Open in Stop Light Switch Circuit >> Inspection Procedure
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Inspection Procedure

  1. CHECK STOP LIGHT SWITCH OPERATION 
    1. Check that the stop light turns on when the brake pedal is depressed and turns off when the brake pedal is released.
      STOP LIGHT CONDITION

      Condition Stop Light Condition
      Brake pedal depressed Turns on
      Brake pedal released Turns off

    OK: Go to step  3

    NG: Go to Next step 

  2. CHECK STOP LIGHT CIRCUIT 

    NG: CHECK STOP LIGHT BULB AND REPAIR OR REPLACE STOP LIGHT CIRCUIT 

    OK: Go to Next step 

  3. CHECK SKID CONTROL ECU ASSEMBLY 
    1. Remove the skid control ECU with the connectors still connected.
    2. Measure the voltage between terminal STP of the skid control ECU and body ground when the brake pedal is depressed.

      OK: Standard voltage: 

      10 to 14 V 

    OK: END 

    Fig 1: Identifying A40 Connector Terminals
    G05283289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next step 

  4. CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - STOP LIGHT SWITCH) 

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY