Inspection Procedure

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

   OK: 

   Stop light switch function is normal. 

   HINT:

   Check the stop light bulb as it may have burnt out.

NG:  Go to step  4

OK: Go to next step 

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   S3-16 (STP) - Body ground	Stop light switch ON (Brake pedal depressed)	8 to 16 V
   S3-16 (STP) - Body ground	Stop light switch OFF (Brake pedal released)	Below 1.5 V

   Fig 1: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   OK (When troubleshooting in accordance with the DTC CHART)	A
   OK (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE)	B
   NG	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) 

A: Go to next step 

1. Clear the DTC (See DTC CHECK / CLEAR  ).
2. Check that the same DTC is recorded (See DTC CHECK / CLEAR  ).

   HINT:

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

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   DTC (C1249/49) is output	A
   OTC (C1249/49) is not output	B

B: END 

A: REPLACE BRAKE ACTUATOR ASSEMBLY 

1. Disconnect the stop light switch connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   S12-2 - Body ground	Always	10 to 14 V

Fig 2: Identifying Stop Light Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step 

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

Fig 3: Identifying Stop Light Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH 

OK: Go to next step 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S3-16 (STP) - S12-1	Below 1 Ω
   S3-16 (STP) - Body ground	10 kΩ or higher

   HINT:

   • When troubleshooting in accordance with the DTC CHART, check DTCs before replacing the brake actuator assembly (See DTC CHECK / CLEAR  ).
   • When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE , be sure to follow the table before replacing the brake actuator assembly.
Fig 4: Identifying Skid Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY