ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1249/49

DTC Code DTC Name
C1249/49 Open in Stop Light Switch Circuit

DESCRIPTION

The skid control ECU assembly receives the stop light switch assembly signal and detects the brake pedal operation status.

The skid control ECU assembly has an open detection circuit, which stores this DTC if it detects an open in the stop light input line or ground line of the stop light circuit with the stop light switch assembly off (brake pedal not depressed).

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1249/49 Open in Stop Light Switch Circuit 520 When IG2 terminal voltage is 9.5 V or more, an open stop light switch circuit continues for 10 seconds or more.

  • Wire harness or connector (refer to "Open Detection Area")

  • Improperly connected connector, deformation or corrosion of terminals

  • Stop light switch assembly

  • No. 3 semiconductor power integration ECU

  • Skid control ECU assembly

 Electronically controlled brake system DTC
DTC No. Brake warning light / yellow (minor malfunction) code ABS warning light code Slip indicator light code Brake hold standby indicator light code
C1249 49 42 45 21

WIRING DIAGRAM


  1. B000YJ2E03

CAUTION / NOTICE / HINT

Note


  • When replacing the skid control ECU assembly, perform initialization and calibration of the linear solenoid valve.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG).

    4. Depress the brake pedal for 5 seconds or more.

    5. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1380/15 is not output. A
      DTC C1380/15 is output. B

    B

    GO TO DTC (C1380/15) Click here

    A

  2. CHECK STOP LIGHT OPERATION


    1. Depress the brake pedal and check that all the stop lights turn on.

      OK
      All stop lights turn on
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG) and wait for 10 seconds or more.

    4. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1249/49 is not output. A
      DTC C1249/49 is output. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE SKID CONTROL ECU ASSEMBLY for RHD: Click here
    REPLACE SKID CONTROL ECU ASSEMBLY for LHD: Click here