Dtc C1249/49 Open In Stop Light Switch Circuit

Brake. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Brake Control Dynamic Control Systems. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STOP LIGHT OPERATION

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SW)

RECONFIRM DTC

CHECK TERMINAL VOLTAGE (STP TERMINAL)

DTC C1249/49 Open in Stop Light Switch Circuit


DESCRIPTION

The skid control ECU (brake actuator assembly) has an open detection circuit, which outputs this DTC when detecting open circuits in the stop light input line of the stop light LH and RH circuits or an open in the ground line with the stop light switch off (brake pedal not depressed).

DTC Code
DTC Detection Condition
Trouble Area
C1249/49
When the IG1 terminal voltage is 9.5 V or higher, either condition continues for 0.3 seconds or more.
  1. Open circuits in the stop light LH and RH circuits.
  2. An open circuit in the ground line of the stop light LH and RH circuits.
  1. Stop light switch circuit
  2. Stop light LH and RH circuits
  3. Skid control ECU (Brake actuator assembly)

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit


INSPECTION PROCEDURE

NOTICE:
  1. Before disconnecting the connector, make sure that there are no problems with the connection.
  2. After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.
1.CHECK STOP LIGHT OPERATION

  1. Check that the stop light LH and RH come on when the brake pedal is depressed, and go off when the brake pedal is released.

    OK:
    Condition
    		Illumination Condition
    Brake pedal depressed
    		On
    Brake pedal released
    		Off


NG
GO TO LIGHTING SYSTEM (PROBLEM SYMPTOMS TABLE) (HILUX_TGN26 RM000002CE2086X.html)
OK


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

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / 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 depressed
    OFF: Brake pedal released
    		-

  1. Using the intelligent tester, check the input of the stop light switch operation when the brake pedal is operated.

    OK:
    When the brake pedal is operated, the display changes as shown above.


NG
Go to step 4
OK


3.RECONFIRM DTC

  1. Clear the DTC (HILUX_TGN26 RM000000XHV0CFX.html).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Check if the same DTC is output (HILUX_TGN26 RM000000XHV0CFX.html).

    Result
    Result
    		Proceed to
    DTC not output
    		A
    DTC output
    		B
    HINT:
    If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step (HILUX_TGN26 RM000000XHN0CQX.html).


B
REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K0019X.html)
A

USE SIMULATION METHOD TO CHECK (HILUX_TGN26 RM000004QR7004X.html)

4.CHECK TERMINAL VOLTAGE (STP TERMINAL)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A13-10 (STP) - Body ground
    		Brake pedal depressed
    		8 to 14 V
    Brake pedal released
    		Below 1.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Brake Actuator Assembly])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K0019X.html)