Inspection Procedure

HINT:

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

1. CHECK BRAKE FLUID LEVEL IN RESERVOIR 
   1. Check that the brake fluid level is sufficient.

      HINT:

      • If the fluid level drops, check for a fluid leak, and repair if found.
      • If no leaks exist, add and adjust fluid and then check that the trouble code is not output again.

        OK: Brake fluid level is proper. 

   NG: ADD BRAKE FLUID 

   OK: Go to Next Step 

2. 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 of the switch.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART
      
      

      Tester Connection	Fluid Level	Specified Condition
      B1-1 - B1-2	Proper	1.8 to 2.16 kΩ
      B1-1 - B1-2	Below minimum level	Below 1 Ω

   NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY 

   Fig 1: Inspecting Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step 

3. CHECK WIRE HARNESS (SKID CONTROL ECU - BRAKE FLUID LEVEL WARNING SWITCH) 
   1. Disconnect the S10 ECU connector.
   2. Disconnect the B1 switch connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART
      
      

      Tester Connection	Specified Condition
      S10-6(LBL) - B1-2	Below 1 Ω
      S10-6 (LBL) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   Fig 2: Identifying Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step 

4. RECONFIRM DTC 
   1. Clear the DTCs (see DTC CHECK / CLEAR  ).
   2. Turn the power switch ON (READY).
   3. Check that the same DTCs are recorded (see DTC CHECK / CLEAR  ).

      HINT:

      This DTC may be memorized due to a malfunction in the connector terminal connection, etc.

      Result 

      DTC RESULT REFERENCE
      
      

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

   B: END 

   A: REPLACE SKID CONTROL ECU