DTC C1249-49: Open in Stop Light Switch Circuit [11/2016 - ]: Procedure

1. Check that the stop lights 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

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

See step  5

Result:  1

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the Data List on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [11/2016 - ]

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop light switch assembly	ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display
   Stop Light SW

4. Check that the stop light switch assembly display observed on the Techstream changes according to brake pedal operation.

   OK

   The Techstream displays ON or OFF according to brake pedal operation.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

See step  4

Result:  1

OK 

See step  3

1. Turn the power switch off.
2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [02/2014 - ]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

3. Turn the power switch off.
4. Turn the power switch on (READY).
5. Depress the brake pedal several times to test the stop light circuit.
6. Check if the same DTC is output.

   Refer to DTC CHECK / CLEAR [02/2014 - ]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1249-49 is not output.	A
   DTC C1249-49 is output.	B

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

   Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

Result:  1

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

Result:  2

B 

REPLACE SKID CONTROL ECU ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

1. Turn the power switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU Assembly)

2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
3. Disconnect the A64 skid control ECU assembly connector.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A64-16 (STP) - Body ground	Stop light switch assembly on (Brake pedal depressed)	8 to 14 V
   A64-16 (STP) - Body ground	Stop light switch assembly off (Brake pedal released)	Below 1.5 V

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

   Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE SKID CONTROL ECU ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) 

1. Check the stop light switch assembly.

   Refer to ON-VEHICLE INSPECTION [11/2016 - ]

   OK

   The stop light switch assembly is normal.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

Result:  1

OK 

See step  6

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU Assembly)

2. Disconnect the A64 skid control ECU assembly connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A64-16 (STP) - Body ground	Stop light switch assembly on (Brake pedal depressed)	8 to 14 V
   A64-16 (STP) - Body ground	Stop light switch assembly off (Brake pedal released)	Below 1.5 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) 

Result:  1

OK 

See step  7

1. Reconnect the A64 skid control ECU assembly connector.
2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [02/2014 - ]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

3. Turn the power switch off.
4. Turn the power switch on (READY).
5. Depress the brake pedal several times to test the stop light circuit.
6. Check if the same DTC is output.

   Refer to DTC CHECK / CLEAR [02/2014 - ]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1249-49 is not output.	A
   DTC C1249-49 is output.	B

   HINT: 

   • If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

     Refer to PROBLEM SYMPTOMS TABLE [02/2014 - ]

   • If the lighting system is normal but the DTC is still output, replace the skid control ECU assembly.

     Refer to REMOVAL [02/2014 - ]

Result:  1

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

Result:  2

B 

INSPECT LIGHTING SYSTEM (STOP LIGHT CIRCUIT). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2014 - ]