ANTI-LOCK BRAKE SYSTEM (w/ Rear Differential Lock), Diagnostic DTC:C1249/49

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

DESCRIPTION

This circuit recognizes brake operation by sending a stop light signal to the skid control ECU.

DTC No. DTC Detection Condition Trouble Area
C1249/49

Both conditions continue for at least 0.3 seconds:


  • IG1 terminal voltage is between 10 and 16 V

  • Open in stop light switch circuit

  • Stop light bulb

  • Stop light switch assembly

  • Stop light switch circuit

WIRING DIAGRAM

A01J58ZE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK STOP LIGHT SWITCH (OPERATION)


    1. Check that the stop light illuminates when the brake pedal is depressed, and turns off when the brake pedal is released.

      OK
      Condition Stop Light Condition
      Brake pedal depressed Illuminates
      Brake pedal released Turns off

    NG

    INSPECT STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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

    A01J5DRE06

    1. Disconnect the S2 ECU connector.

    2. Disconnect the S14 stop light switch connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      S2-10 (STP) - S14-1 Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK IF DTC OUTPUT RECURS


    1. Clear the DTCs.

    2. Drive the vehicle at approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check for DTCs.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    END

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY

  4. INSPECT STOP LIGHT SWITCH ASSEMBLY

    A01J4XPE01

    1. Disconnect the switch connector.

    2. Measure the resistance of the stop light switch.

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pin not pushed Below 1 Ω
      1 - 2 Pin pushed 10 kΩ or higher
      3 - 4 Pin not pushed 10 kΩ or higher
      3 - 4 Pin pushed Below 1 Ω

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY

    OK

  5. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)

    A01J5LSE01

    1. Disconnect the S2 ECU connector.

    2. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Condition Specified Condition
      S2-10 (STP) - Body ground Brake pedal depressed 8 to 14 V
      S2-10 (STP) - Body ground Brake pedal released Below 1 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  6. CHECK IF DTC OUTPUT RECURS


    1. Clear the DTCs.

    2. Drive the vehicle at approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check for DTCs.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    END

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY