Inspection Procedure

1. Remove the STOP fuse from the instrument panel junction block.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go TO NEXT STEP. 

1. Remove the rear combination light.
2. Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 1, then check that the light comes on.
   Fig 1: Connecting Battery To Stop Light (Rear Combination Light) Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Light comes on. 

NG: REPLACE REAR COMBINATION LIGHT 

OK: Go TO NEXT STEP. 

1. Remove the high mount stop light assembly.
2. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the light comes on.
   Fig 2: Connecting Battery To Rear Stop Light (High Mount Stop Light) Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Light comes on 

NG: REPLACE HIGH MOUNT STOP LIGHT ASSEMBLY 

OK: Go TO NEXT STEP. 

1. Remove the BRK relay from the engine room No. 1 relay block.
2. Measure the resistance of the relay.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   3 - 4	Below 1 Ω
   3 - 4	10 kΩ or higher (Battery voltage applied to terminals 1 and 2)
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (Battery voltage applied to terminals 1 and 2)

   Fig 3: Identifying BRK Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BRK RELAY 

OK: Go TO NEXT STEP. 

1. Remove the stop light switch.
2. Measure the resistance of the switch.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

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

   Fig 4: Inspecting Stop Light Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH 

OK: Go TO NEXT STEP. 

1. Disconnect the A3 stop light switch connector.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   A3-2 - Body ground	10 to 14 V

   Fig 5: Identifying A3 Stop Light Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go TO NEXT STEP. 

1. Disconnect the A3 stop light switch connector.
2. Disconnect the K12 and K14 rear combination light connectors.
3. Disconnect the Q1 high mount stop light connector.
4. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   A3-1 - K12-4	Below 1 Ω
   A3-1 or K12-4 - Body ground	10 kΩ or higher
   A3-1 - K14-4	Below 1 Ω
   A3-1 or K14-4 - Body ground	10 kΩ or higher
   A3-1 - Q1-2	Below 1 Ω
   A3-1 or Q1-2 - Body ground	10 kΩ or higher

   Fig 6: Identifying A3, K12, k14 & Q1 Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (REAR STOP LIGHT - BODY GROUND)