DTC C1249/49: Open in Stop Light Switch Circuit: Procedure

1. Check that the stop light turns on when the brake pedal is depressed and turns off when the brake pedal is released.

   OK

   Condition	Specified Condition
   Brake pedal depressed	Stop light turns on
   Brake pedal released	Stop light turns off

NG → See step   3 

OK: Go to next step 

Fig 1: Checking Wire Harness (Skid Control ECU - Driver Side Junction Block ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S7 and D4 ECU connectors.
2. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   S7-10 (STP) - D4-3 (STPA)	Below 1 Ω
   S7-10 (STP) - Body ground	10 kΩ or higher

OK → REPAIR OR REPLACE HARNESS AND CONNECTOR 

NG → REPLACE SKID CONTROL ECU 

Fig 2: Identifying Stop Light Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the switch connector.
2. Measure the resistance of the 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

NG → REPLACE STOP LIGHT SWITCH 

OK: Go to next step 

Fig 3: Checking Wire Harness (Stop Light Switch - Driver Side Junction Block ECU And Battery)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the D2 ECU connector.
2. Disconnect the S10 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   D2-13 (STP1) - S10-1	Below 1 Ω

4. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Specified Condition
   S10-2 - Body ground	10 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect the S7 and D4 ECU connectors.
   Fig 4: Checking Wire Harness (Skid Control ECU - Driver Side Junction Block ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   S7-10 (STP) - D4-3 (STPA)	Below 1 Ω
   S7-10 (STP) - Body ground	10 kΩ or higher

OK → REPAIR OR REPLACE HARNESS AND CONNECTOR 

NG → REPLACE SKID CONTROL ECU