Dtc C1249/49 Open In Stop Light Switch Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STOP LIGHT SWITCH (OPERATION)

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

CHECK IF DTC OUTPUT RECURS

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)

CHECK IF DTC OUTPUT RECURS

DTC 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:
  1. IG1 terminal voltage is between 10 and 16 V
  2. Open in stop light switch circuit
  1. Stop light bulb
  2. Stop light switch
  3. Stop light switch circuit

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit


INSPECTION 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
Go to step 4
OK


2.CHECK WIRE HARNESS (SKID CONTROL ECU - STOP LIGHT SWITCH)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the S2 ECU connector.

  1. Disconnect the S14 stop light switch connector.

  1. 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.

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

  1. 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
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the switch connector.

  1. 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)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the S2 ECU connector.

  1. 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.

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

  1. Check for DTCs.

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


B
END
A

REPLACE BRAKE ACTUATOR ASSEMBLY