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.

NEXT: Go to Next Step. 

1. Check if the DTCs are recorded (see DTC CHECK/CLEAR  ).

1. NO: Go to step 3 

YES: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE  DIAGNOSTIC TROUBLE CODE CHART   ) 

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 on the hand-held tester.
   ACTIVE TEST
   
   

   Item	Vehicle Condition / Test Details	Diagnostic Note
   BRAKE WRN LIGHT	Turns BRAKE warning light ON / OFF	Observe combination meter

4. Check that "ON" and "OFF" of the BRAKE warning light are shown on the combination meter with the hand-held tester.

   OK: The BRAKE warning light is turned ON or OFF in accordance with the hand-held tester. 

WHEN NOT USING HAND-HELD TESTER: 

1. Turn the ignition switch off and disconnect connector S1 from the skid control ECU.
2. Turn the ignition switch to the ON position.

   OK: The brake warning light comes on. 

   Fig 1: Disconnecting Connector S1 From Skid Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: Go to step   8 

NG: Go to Next Step. 

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

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (1 OF 8)
   
   

   Tester Connection	Switch Condition	Specified Condition
   P3-1 - Ground part	Released	Below 1 Ω
   P3-1 - Ground part	Pushed in	10 kΩ or higher

   Fig 2: Inspecting Parking Brake Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR PARKING BRAKE SWITCH ASSY 

OK: Go to Next Step. 

1. Disconnect the skid control ECU connector S1 and the parking brake switch connector P3.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (2 OF 8)
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - P3 - 1 (PKB)	Below 1 Ω

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

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (3 OF 8)
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - Body ground	10 kΩ or higher

   Fig 3: Checking Harness Or Connector (Skid Control ECU - Parking Brake Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

1. Remove the reservoir tank cap and strainer.
2. Disconnect the brake fluid level warning switch connector B2.
3. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (4 OF 8)
   
   

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

   Fig 4: Inspecting Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE BRAKE FLUID LEVEL WARNING SWITCH 

OK: Go to Next Step. 

1. Disconnect the combination meter connector C8 and the brake fluid level warning switch connector B2.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (5 OF 8)
   
   

   Tester Connection	Specified Condition
   (C7-16) - (B2-1)	Below 1 Ω

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

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (6 OF 8)
   
   

   Tester Connection	Specified Condition
   (C7-16) - Body ground	10 kΩ or higher

   Fig 5: Checking Harness Or Connector (Brake Fluid Level Warning Switch Combination Meter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

1. Disconnect the skid control ECU connector S1 and combination meter connector C8.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (7 OF 8)
   
   

   Tester Connection	Specified Condition
   S1-44 (BRL) - C8-3	Below 1 Ω

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

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (8 OF 8)
   
   

   Tester Connection	Specified Condition
   S1-44 (BRL) - Body ground	10 kΩ or higher

   Fig 6: Checking Harness And Connector (Skid Control ECU - Combination Meter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

1. Check combination meter assy (see COMBINATION METER ).

1. NG: REPAIR OR REPLACE COMBINATION METER ASSY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

OK: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  )