Inspection Procedure

HINT:

When releasing the parking brake, set the chocks to hold the vehicle for safety.

1. CHECK BRAKE FLUID 

   Check that the brake fluid level is proper. 

   NG: ADD BRAKE FLUID 

   OK: Go to next step. 

2. CHECK DTC FOR ABS 

   Are the DTC recorded? (SEE  DTC CHECK/CLEAR   ) 

   NO: Go to step 3 

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

3. INSPECT BRAKE WARNING LIGHT 

   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.
      BRAKE WARNING LIGHT VEHICLE CONDITION/TEST DETAILS
      
      

      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 indicated on the combination meter when using the hand-held tester.
      • OK: 
      • The brake warning light turns 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. Ground terminal BRL of the skid control ECU.
   3. Turn the ignition switch to the ON position.
   4. Check the BRAKE warning light.

      OK: 

      BRAKE WARNING LIGHT ILLUMINATION CONDITION
      
      

      BRL - GND Condition	Illumination Condition
      Connecting	OFF
      Disconnecting	ON

      Fig 1: Inspecting Brake Warning Light

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 4 

   OK: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 

4. INSPECT PARKING BRAKE SWITCH ASSY 
   1. Remove the parking brake switch assy connector.
   2. Measure the resistance according to the value(s) in the table shown in PARKING BRAKE SWITCH ASSY SPECIFIED CONDITIONS  .

      STANDARD: 

      PARKING BRAKE SWITCH ASSY SPECIFIED CONDITIONS
      
      

      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 Assy

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: INSPECT COMBINATION METER ASSY 

   OK: Go to next step. 

5. CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSY - SKID CONTROL ECU) 
   1. Disconnect the skid control ECU and parking brake switch assy connector.
   2. Measure the resistance according to the value(s) in the table shown in PARKING BRAKE SWITCH ASSY - SKID CONTROL ECU SPECIFIED CONDITIONS  .

      STANDARD: 

      PARKING BRAKE SWITCH ASSY - SKID CONTROL ECU SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      S1-18 (PKB) - P6-1 (PKB)	Below 1 Ω
      S1-18 (PKB) - Body ground	10 kΩ or higher

      Fig 3: Checking Harness And Connector (Parking Brake Switch Assy - Skid Control ECU Specified Conditions)

      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 shown in BRAKE FLUID LEVEL WARNING SWITCH SPECIFIED CONDITIONS  .

      STANDARD: 

      BRAKE FLUID LEVEL WARNING SWITCH SPECIFIED CONDITIONS
      
      

      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

   NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSY 

   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 shown in COMBINATION METER SPECIFIED CONDITIONS  .

      STANDARD: 

      COMBINATION METER SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      C6-12 - B2-1	Below 1 Ω

   3. Measure the resistance according to the value(s) in the table shown in BRAKE FLUID LEVEL WARNING SWITCH SPECIFIED CONDITIONS  .

      STANDARD: 

      BRAKE FLUID LEVEL WARNING SWITCH SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      C6-12 - Body ground	10 kΩ or higher

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

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step. 

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
   1. Disconnect the skid control ECU connector and combination meter connector.
   2. Measure the resistance according to the value(s) in the table shown in SKID CONTROL ECU SPECIFIED CONDITIONS  .

      STANDARD: 

      SKID CONTROL ECU SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      S1-32 (BRL) - C6-10	Below 1 Ω

   3. Measure the resistance according to the value(s) in the table shown in COMBINATION METER SPECIFIED CONDITIONS  .

      STANDARD: 

      COMBINATION METER SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      S1-32 (BRL) - Body ground	10 kΩ or higher

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

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step. 

9. INSPECT COMBINATION METER ASSY 
   1. Check combination meter assy (SEE COMBINATION METER ).

   NG: CHECK COMBINATION METER ASSY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

   OK: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  )