Inspection Procedure

HINT:

When releasing the parking brake, move the shift lever into the P position in an AT vehicle, and choke in an MT vehicle to hold the vehicle for safety.

1. CHECK BRAKE FLUID LEVEL 
   1. Check that the brake fluid level is proper.

   NG: ADD BRAKE FLUID 

   OK: Go to Next Step 

2. CHECK DTC 
   1. Are the DTC recorded? (See DTC CHECK / CLEAR  )

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC is output	A
      DTC is not output	B

   B: Go to step 3 

   A: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

3. CHECK BRAKE WARNING LIGHT 
   1. WHEN USING TECHSTREAM:
      1. Connect Techstream to the DLC3.
      2. Start the engine.
      3. Select the item "Brake Warning Lamp" in the Active Test and operate the BRAKE warning light on Techstream.

         ABS / VSC / TRAC: 

         ACTIVE TEST
         
         

         Tester Display	Test Part	Control Range	Diagnostic Note
         Brake Warning Lamp	BRAKE warning light	Warning light ON / OFF	Observe combination meter

      4. Check that "ON" and "OFF" of the BRAKE warning light are indicated on the combination meter when using Techstream.

         OK: Turn the BRAKE warning light on or off in accordance with Techstream. 

   2. WHEN NOT USING TECHSTREAM:
      1. Turn the ignition switch off and disconnect the connector from the skid control ECU.
      2. Ground terminal BRL of the skid control ECU.
      3. Turn the ignition switch to the ON position.
      4. Check that the brake warning light.

         OK: Turn the light on or off in accordance with the connection of terminal GND and BRL. 

         NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION  ).
   Fig 1: Identifying Skid Control ECU Connector S3 Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 4 

   OK: REPLACE BRAKE ACTUATOR ASSEMBLY 

4. INSPECT PARKING BRAKE SWITCH 
   1. Remove the parking brake switch connector.
   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
      P6-1 - Ground part	Released	Below 1 Ω
      P6-1 - Ground part	Pushed in	10 kΩ or higher

   Fig 2: Inspecting Parking Brake Switch Assembly
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE PARKING BRAKE SWITCH 

   OK: Go to Next Step 

5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH) 
   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 resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      S3-28 (PKB) - P6-1 (PKB)	Below 1 Ω

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

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

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

   Fig 3: Identifying Skid Control ECU Connector S3 Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

6. 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 resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Switch Condition	Specified Condition
      (B1-1)-(B1-2)	Float UP	10 kΩ or higher
      (B1-1)-(B1-2)	Float DOWN	Below 1 Ω

   Fig 4: Identifying Brake Fluid Level Warning Switch Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH) 

   OK: Go to Next Step 

7. 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 resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      (C10-13)-(B1-1)	Below 1 Ω

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

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      (C10-13) - Body ground	10 kΩ or higher

   Fig 5: Identifying Brake Fluid Level Warning Switch Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPAIR OR REPLACE COMBINATION METER ASSEMBLY