Inspection Procedure

1. Disconnect the stop light switch assembly connector.
2. Measure the resistance according to the values in the table below.

   Standard resistance 

   STOP LIGHT SWITCH ASSEMBLY
   
   

   Switch Condition	Tester Connection	Specified Condition
   Switch pin free	1 - 2	Below 1 Ω
   Switch pin free	3 - 4	10 kΩ or higher
   Switch pin pushed in	1 - 2	10 kΩ or higher
   Switch pin pushed in	3 - 4	Below 1 Ω

   Fig 1: Inspecting Stop Light Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH ASSEMBLY 

OK: GO TO NEXT STEP 

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

   Standard voltage 

   HARNESS AND CONNECTOR
   
   

   Tester Connection	Condition	Specified Condition
   S9-2 - Body ground	Always	10 to 14 V
   S9-3 - Body ground	Ignition SW ON	10 to 14 V

   Fig 2: Identifying S9 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: GO TO NEXT STEP 

1. Reconnect the stop light switch connector.
2. Disconnect the connector from the ECM.
3. Turn the ignition switch to the ON position.
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   ECM
   
   

   Tester Connection	Condition	Specified Condition
   E5-19(STP) - Body ground	Brake pedal depressed	10 to 14 V
   E5-19(STP) - Body ground	Brake pedal released	Below 1 V
   E5-12(ST1-) - Body ground	Brake pedal depressed	Below 1 V
   E5-12(ST1-) - Body ground	Brake pedal released	10 to 14 V

   Fig 3: Inspecting ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE ECM