Inspection Procedure

HINT:

Start the inspection from step 1 in case of using the hand-held tester and start from step  2 in case of not using the hand-held tester.

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (BRAKE WARNING LIGHT) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select the item "BRAKE WARN LIGHT" in the ACTIVE TEST and operate the BRAKE warning light on the hand-held tester.
   4. Check that "ON" and "OFF" of the BRAKE warning light is shown on the combination meter by the hand-held tester.
      BRAKE WARNING LIGHT CIRCUIT REFERENCE
      
      

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

   1. NG: Go to step   7 
   2. OK: Go to next step. 
2. CHECK DTC FOR ABS 
   1. Check if the DTCs are detected (See DTC CHECK/CLEAR  ).
   1. NO : Go to step 3 
   2. YES : REPAIR CIRCUIT INDICATED BY OUTPUT CODE 
3. INSPECT PARKING BRAKE SWITCH ASSY 
   1. Remove the parking brake switch.
   2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      PARKING BRAKE SWITCH ASSY REFERENCE
      
      

      Tester Connection	Engine Condition	Specified condition
      P-3 - 1 Ground part	Released	1 Ω or less
      	Pushed in	10 kΩor higher

      Fig 1: Inspecting Parking Brake Switch Assy

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE PARKING BRAKE SWITCH ASSY 
   2. OK: Go to next step. 
4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH ASSY) 
   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.

      Standard: 

      SKID CONTROL ECU - PARKING BRAKE SWITCH ASSY RESISTANCE
      
      

      Tester Connection	Specified Condition
      PKB (S3-28) - PKB (P3-1)	1 Ω or less

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

      Standard: 

      SKID CONTROL ECU - PARKING BRAKE SWITCH ASSY RESISTANCE
      
      

      Tester Connection	Specified Condition
      PKB (S3-28) - Body ground	10 kΩor higher

      Fig 2: Identifying Skid Control ECU - Parking Brake Switch Assy Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: Go to next step. 
5. INSPECT BRAKE FLUID LEVEL WARNING SWITCH 
   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 RESISTANCE
      
      

      Tester Connection	Engine Condition	Specified condition
      (B2 - 1) - (B2 - 2)	Float UP	10 kΩor higher
      	Float DOWN	1 Ω or less

      Fig 3: Inspecting Brake Fluid Level Warning Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSY 
   2. OK: Go to next step. 
6. CHECK HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH - COMBINATION METER) 
   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: 

      BRAKE FLUID LEVEL WARNING SWITCH - COMBINATION METER RESISTANCE
      
      

      Tester Connection	Specified Condition
      (C6-15) - (B2-1)	1 Ω or less

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

      Standard: 

      BRAKE FLUID LEVEL WARNING SWITCH - COMBINATION METER RESISTANCE
      
      

      Tester Connection	Specified Condition
      (C6-15) - Body ground	10 kΩor higher

      Fig 4: Identifying Brake Fluid Level Warning Switch - Combination Meter Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: Go to next step. 
7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
   1. Disconnect the combination meter connector and the skid control connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SKID CONTROL ECU - COMBINATION METER RESISTANCE
      
      

      Tester Connection	Specified Condition
      BRL (S3-44) - C6(14)	1 Ω or less

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

      Standard: 

      SKID CONTROL ECU - COMBINATION METER RESISTANCE
      
      

      Tester Connection	Specified Condition
      BRL (S3-44) - Body ground	10 kΩor higher

      Fig 5: Identifying Skid Control ECU - Combination Meter Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: REPLACE BRAKE ACTUATOR ASSY (See  BRAKE ACTUATOR ASSY  ) 
      NOTE: When replacing the brake actuator assy, perform the zero point calibration (See  CALIBRATION   ).