Inspection Procedure

1. Check that all of the following conditions for not illuminating the brake warning light are satisfied.
   1. The ABS warning light is off.
   2. The amount of the brake fluid is between the Min. line and Max. line of the brake master cylinder reservoir.
   3. The parking brake pedal is fully released.

1. NEXT 

1. Check if the DTCs are recorded.

1. NO : Go to step   3 
2. YES : REPAIR CIRCUIT INDICATED BY OUTPUT CODE (See  DIAGNOSTIC TROUBLE CODE TABLE   ) 

WHEN USING HAND-HELD TESTER: 

1. Connect the hand-held tester to the DLC3.
2. Start the engine.
3. Select the "BRAKE WARN LIGHT" in the ACTIVE TEST and operate the BRAKE warning light by the hand-held tester.
4. Check that "ON" and "OFF" of the BRAKE warning light can be shown on the combination meter with the hand-held tester.
   BRAKE WARNING LIGHT TEST
   
   

   Item	Vehicle Condition/Test Details	Diagnostic Note
   BRAKE WARN LIGHT	Turns BRAKE warning light on/off	Observe combination meter

   Standard: 

   Turn the BRAKE warning light ON or OFF in accordance with the hand-held tester. 

WHEN NOT USING HAND-HELD TESTER: 

1. Turn the ignition switch OFF and disconnect the connector from the skid control ECU.
2. Use a service wire, connect terminal BRL (32) to GND1 (2) of skid control ECU harness side connector.
3. In the same way, use the service wire to connect terminal BRL (32) to GND2 (24) of skid control ECU harness side connector.
4. Turn the ignition switch to the ON position.
   Fig 1: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Check the brake warning light goes off.

   Standard: Turn the light ON or OFF in accordance with the connecting condition of the terminal GND and BRL. 

1. NG : Go to step   4 
2. OK : REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  ) 

1. Remove the parking brake switch.
2. Measure the resistance according to the value(s) in the table below.

   Standard: 

   PARKING BRAKE SWITCH RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   P4-1 - Ground part	Released	1 Ω or less
   P4-1 - Ground part	Pushed in	10 kΩ or higher

   Fig 2: Inspecting Parking Brake Switch Assy

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPLACE PARKING BRAKE SWITCH ASSY 
2. OK : GO TO NEXT STEP 

1. Disconnect the skid control ECU connector and the parking brake switch connector.
2. Measure the resistance according to the value(s) in the table below.
   SKID CONTROL ECU AND PARKING BRAKE SWITCH CONNECTOR RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   PKB (S1-18) - PKB (P4-1)	1 Ω or less

3. Measure the resistance according to the value(s) in the table below.
   SKID CONTROL ECU - BODY GROUND RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   PKB (S1-18) - Body ground	10 kΩ or higher

   Fig 3: Identifying Skid Control ECU & Parking Brake Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK : GO TO NEXT STEP 

1. Remove the reservoir tank cap and strainer.
2. Disconnect the brake fluid level warning switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard: 

   BRAKE FLUID LEVEL WARNING SWITCH CONNECTOR RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   (B2-1) - (B2-2)	Float UP	10 kΩ or higher
   (B2-1) - (B2-2)	Float DOWN	1 Ω or less

   Fig 4: Inspecting Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPLACE BRAKE FLUID LEVEL WARNING SWITCH 
2. OK : GO TO NEXT STEP 

1. Disconnect the combination meter connector and the brake fluid level warning switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard: 

   COMBINATION METER AND BRAKE FLUID LEVEL WARNING SWITCH CONNECTOR RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   (C11-15) - (B2-1)	1 Ω or less

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

   Standard: 

   COMBINATION METER - BODY GROUND RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   (C11-15) - Body ground	10 kΩ or higher

   Fig 5: Identifying Combination Meter & Brake Fluid Level Warning Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK : REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  )