VEHICLE STABILITY CONTROL SYSTEM(for TMMF Made), Diagnostic DTC:C1249

DTC Code DTC Name
C1249 Open in Stop Light Switch Circuit

DESCRIPTION

The skid control ECU detects the brake operating conditions through a signal transmitted by the stop light switch. The skid control ECU incorporates an open circuit detection circuit.

DTC No. DTC Detection Condition Trouble Area
C1249

When either of following (1 or 2) detected:


  1. Vehicle driven at 20 km/h (12 mph) or more for 6 minutes or more with stop light switch signal on

  2. During deceleration from 40 km/h (24 mph) to 3 km/h (2 mph), no change occurs in the stop light switch signal 4 times

  • Stop light switch assembly

  • Stop light switch circuit

  • Skid control ECU (Brake actuator assembly)

WIRING DIAGRAM

A01VGMYE04

CAUTION / NOTICE / HINT

Note


  • When replacing the brake actuator assembly, perform zero point calibration Click here.

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SW)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menu: Chassis / ABS/VSC/TRC / Data List.

    5. In accordance with the display on the tester, read the Data List.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW

      Stop light switch:

      ON or OFF

      ON: Brake pedal applied

      OFF: Brake pedal released

      		 -

    6. Check that "Stop Light SW" turns ON and OFF when the brake pedal is depressed and released.

      OK
      "Stop Light SW" turns on and off in accordance with the operation of the brake pedal.

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. CHECK SKID CONTROL ECU TERMINAL VOLTAGE (STP TERMIANL)


    1. Disconnect the skid control ECU connector.

    2. A01VJYPE02
      Text in Illustration
      *A except LHD with CVT
      *B for LHD with CVT
      *a

      Front view of wire harness connector

      (to skid control ECU)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage (for LHD with CVT, and RHD)
      Tester Connection Condition Specified Condition
      A78-17 (STP) - Body ground Brake pedal depressed 11 to 14 V
      Brake pedal released Below 1.5 V
      Standard Voltage (for LHD except CVT)
      Tester Connection Condition Specified Condition
      A79-17 (STP) - Body ground Brake pedal depressed 11 to 14 V
      Brake pedal released Below 1.5 V
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    3. Reconnect the skid control ECU connector.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  3. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. A01VF5EE02
      Text in Illustration
      *a

      Component without harness connected

      (Stop Light Switch)
      *b Released
      *c Pushed in

      Disconnect the stop light switch connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Switch pin released Below 1 Ω
      Switch pin pushed in 10 kΩ or higher
      3 - 4 Switch pin released 10 kΩ or higher
      Switch pin pushed in Below 1 Ω

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY)


    1. A01VM3TE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stop Light Switch)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A38-2 - body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH)


    1. Disconnect the skid control ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for LHD with CVT, and RHD)
      Tester Connection Condition Specified Condition
      A78-17 (STP) - A38-1 Always Below 1 Ω
      Standard Resistance (for LHD except CVT)
      Tester Connection Condition Specified Condition
      A79-17 (STP) - A38-1 Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Check if the same DTC is output Click here.

      Result
      Result Proceed to
      DTC C1249 is not output A
      DTC C1249 is output (for LHD) B
      DTC C1249 is output (for RHD) C

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here