Dtc C1249/49 Open In Stop Light Switch Circuit

Brake. Camry. Acv40 Gsv40
Brake Control. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STOP LIGHT SWITCH OPERATION (STOP LIGHT SWITCH CIRCUIT)

INSPECT SKID CONTROL ECU CONNECTOR (STP TERMINAL)

INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY)

RECONFIRM DTC

INSPECT STOP LIGHT SWITCH ASSEMBLY (POWER SOURCE TERMINAL VOLTAGE)

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH TO SKID CONTROL ECU)

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.
The skid control ECU has an open detection circuit, which outputs this DTC when detecting an open in the stop light signal input line (STP terminal) or the ground line of the stop light circuit with the stop light switch off (brake pedal not depressed).

DTC No.
DTC Detecting Condition
Trouble Area
C1249/49
Stop light switch circuit is open, and stop light switch voltage is 40% or more and less than 67% of the battery voltage.
  1. Stop light switch
  2. Stop light switch circuit
  3. Brake actuator assembly (Skid Control ECU)

WIRING DIAGRAM


Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit


INSPECTION PROCEDURE

HINT:
Check the condition of each related circuit connector before troubleshooting (CAMRY_ACV40 RM000000UZ301ZX.html).
1.CHECK STOP LIGHT SWITCH OPERATION (STOP LIGHT SWITCH CIRCUIT)

  1. Check that the stop lights come on when the brake pedal is depressed and goes off when the brake pedal is released.

    OK:

    Pedal Condition
    		Illumination Condition
    Brake pedal depressed
    		ON
    Brake pedal released
    		OFF


NG
Go to step 5
OK


2.INSPECT SKID CONTROL ECU CONNECTOR (STP TERMINAL)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the skid control ECU connector.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A25-20 (STP) - Body ground
    		Brake pedal depressed
    		8 to 14 V
    A25-20 (STP) - Body ground
    		Brake pedal released
    		Below 4.0 V


NG
Go to step 7
OK


3.INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    A25-4 (GND1) - Body ground
    		Below 1 Ω
    A25-1 (GND2) - Body ground
    		Below 1 Ω

  1. Connect the connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK


4.RECONFIRM DTC

  1. Clear the DTC (CAMRY_ACV40 RM000001JB8003X.html).

  1. Start the engine.

  1. Depress the brake pedal several times to test the stop light circuit.

  1. Check if the same DTC is recorded (CAMRY_ACV40 RM000001JB8003X.html).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

    Result:

    Condition
    		Proceed to
    DTC is not output
    		A
    DTC is output (When troubleshooting in accordance with the DTC CHART)
    		B
    DTC is output (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE)
    		C


B
REPLACE BRAKE ACTUATOR ASSEMBLY (CAMRY_ACV40 RM0000013P6007X.html)

C
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (CAMRY_ACV40 RM000001JB5003X.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (CAMRY_ACV40 RM000001JB7003X.html)

5.INSPECT STOP LIGHT SWITCH ASSEMBLY (POWER SOURCE TERMINAL VOLTAGE)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the stop light switch connector.

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A19-2 - Body ground
    		Always
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK


6.INSPECT STOP LIGHT SWITCH ASSEMBLY


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Switch pin free
    		1 - 2
    		Below 1 Ω
    Switch pin pushed in
    		1 - 2
    		10 kΩ or higher


NG
REPLACE STOP LIGHT SWITCH ASSEMBLY (CAMRY_ACV40 RM0000022KA001X.html)
OK


7.CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH TO SKID CONTROL ECU)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System. Dtc C1249/49 Open In Stop Light Switch Circuit

  1. Disconnect the stop light switch connector and skid control ECU connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    A25-20 (STP) - A19-1 (STP)
    		Below 1 Ω

  1. Connect the connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH TO SKID CONTROL ECU)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT CIRCUIT)