Inspection Procedure

1. Disconnect the A22 connector from the stop light switch
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
   A22-2 - Body ground	Always	11 to 14 V
   A22-4 - Body ground	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying Terminals Of Stop Light Switch A22 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the stop light switch (See STOP LIGHT SWITCH )
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Switch pin not pushed	Below 1 Ω
   3 - 4	Switch pin not pushed	10 kΩ or higher
   1 - 2	Switch pin pushed	10 kΩ or higher
   3 - 4	Switch pin pushed	Below 1 Ω

3. Install the stop light switch (See INSTALLATION ).

Fig 2: Identifying Terminals Of Stop Light Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH  (See STOP LIGHT SWITCH )

OK: Go to next step 

1. Reconnect the stop light switch connector.
2. Disconnect the A5 connector from the ECM
3. Turn the engine switch on (IG).
4. Measure the voltage according to the value (s) in the table below

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A5-13 (STP) - Body ground	Brake pedal depressed	11 to 14 V
   A5-13 (STP) - Body ground	Brake pedal released	Below 1 V
   A5-12 (ST1-) - Body ground	Brake pedal depressed	Below 1 V
   A5-12 (ST1-) - Body ground	Brake pedal released	11 to 14 V

   Fig 3: Identifying Terminals Of A5 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH - ECM) 

OK: REPLACE ECM (for 2UR-GSE)  (See ECM )