Inspection Procedure

HINT:

When C1241/41 is output together with C1202/52 or C1202/58, inspect and repair the trouble areas indicated by C1241/41 first.

1. CHECK BRAKE FLUID LEVEL 
   1. Turn the ignition switch off.
   2. Depress the brake pedal 20 times or more (until the pedal reaction feels light and pedal stroke becomes longer).
   3. Check the amount of fluid in the brake reservoir.

      HINT:

      When the ignition switch is turned to the ON position, brake fluid is sent to the accumulator and the fluid level decreases by approximately 5 mm from the level when the ignition switch is off (normal).

      NOTE: Do not move the wheels with the ignition switch off.

      OK:  Brake fluid level is proper.

   1. NG: CHECK AND REPAIR BRAKE FLUID LEAKAGE 
   2. OK: GO TO NEXT STEP 
2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH 
   1. Disconnect the brake fluid level warning switch connector.
   2. Measure the resistance according to the value(s) in the table below.

      HINT:

      • A float is placed inside the reservoir. Its position can be changed by increasing/decreasing the level of brake fluid.
      • The warning switch is switched ON/OFF at +/- 5 mm from the MIN level.
        Fig 1: Inspecting Brake Fluid Level Warning Switch

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      B14-1 - B14-2	Float up (Switch OFF)	1.9 to 2.1 Ω
      B14-1 - B14-2	Float down (Switch ON)	Below 1 Ω

      HINT:

      If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level.

   1. NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSY (SEE  OVERHAUL  ) 
   2. OK: GO TO NEXT STEP 
3. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU, BODY GROUND AND BRAKE FLUID LEVEL WARNING SWITCH) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. Disconnect the skid control ECU connector.
   2. Measure the resistance according to the value(s) in the table below.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S28-41 (LBL) - B14-2	Below 1 Ω
   S28-41 (LBL) - Body ground	10 kΩ or higher
   B14-1 - Body ground	Below 1 Ω

   Fig 2: Identifying Connectors (Skid Control ECU, Body Ground And Brake Fluid Level Warning Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP 
4. RECONFIRM DTC 
   1. Clear the DTC (see DTC CHECK/CLEAR  ).
   2. Check if the same DTCs are detected (see DTC CHECK/CLEAR  ).

      HINT:

      Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

      Result: 

      RESULT DESCRIPTION
      
      

      DTC is output	A
      DTC is not output	B

   1. B: END 
   2. A: GO TO NEXT STEP 

      REPLACE MASTER CYLINDER SOLENOID (SEE  OVERHAUL  )