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 

   PEDAL CONDITION CHART
   
   

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

   HINT:

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

NG:  Go to step  3

OK: Go to Next Step 

1. Disconnect the skid control ECU connector.
Fig 1: Identifying Terminals Of Skid Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TERMINALS VOLTAGE CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   S2-20 (STP) - Body ground	Brake pedal depressed	8 to 14 V
   S2-20 (STP) - Body ground	Brake pedal released	Below 4.0 V

NG:  Go to step  4

OK: REPLACE BRAKE ACTUATOR ASSEMBLY 

1. Disconnect the stop light switch assembly connector.
Fig 2: Identifying Terminals Of Stop Light Switch Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TERMINALS RESISTANCE CHART
   
   

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

NG: REPLACE STOP LIGHT SWITCH ASSEMBLY 

OK: Go to Next Step 

1. Disconnect the stop light switch connector and skid control ECU connector.
Fig 3: Identifying Terminals Of Stop Light Switch And Skid Control ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TERMINALS RESISTANCE CHART
   
   

   Tester Connection	Specified Condition
   S2-20(STP) - S12-1(STP)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY