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 
   1. Check that the brake fluid level is proper.

   NG: ADD BRAKE FLUID 

   OK: Go to next step 

2. CHECK DTC FOR ABS 
   1. Are the DTC recorded (See DIAGNOSTIC TROUBLE CODE CHART  ).

   Result 

   RESULT REFERENCE 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. INSPECT BRAKE WARNING LIGHT 
   1. WHEN USING INTELLIGENT TESTER:
      1. Connect the intelligent 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 intelligent tester.
         ACTIVE TEST REFERENCE CHART
         
         

         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 intelligent tester.

         OK: 

         Turn the BRAKE warning light on or off in accordance with the intelligent tester. 

   2. WHEN NOT USING INTELLIGENT 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 that the brake warning light.
         Fig 1: Identifying Skid Control ECU Connector Terminals

         Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

         OK: 

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

         NOTE: When replacing the ABS actuator assembly, perform zero point calibration (See CALIBRATION  ).

   NG: Go to step 4 

   OK: REPLACE ABS AND TRACTION ACTUATOR 

4. INSPECT PARKING BRAKE SWITCH ASSEMBLY 
   1. Remove the parking brake switch connector.
   2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   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 MOTOR SALES, U.S.A., INC.

   NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY 

   OK: Go to next step 

5. CHECK HARNESS AND CONNECTOR (SKI 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.

      Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      S1-28 (PKB) - P6-1 (PKB)	Below 1 Ω

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

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

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

   Fig 3: Identifying Skid Control ECU Connector Terminals

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   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.

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   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: Inspecting Brake Fluid Level Warning Switch

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   NG: REPLACE 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.

      Resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      (C8-16) - (B1-1)	Below 1 Ω

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

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   (C8-16) - Body ground	10 kΩ or higher

   Fig 5: Disconnecting Combination Meter Connector And Brake Fluid Level Warning Switch Connector

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPAIR OR REPLACE COMBINATION METER ASSEMBLY