Inspection Procedure

HINT:

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

1. CHECK BRAKE FLUID LEVEL 
   1. Turn the engine 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 engine switch is turned on (IG), brake fluid is sent to the accumulator and the fluid level decreases by approximately 10 mm (0.394 in.) from the level when the engine switch is off (normal).

      OK: Brake fluid level is normal. 

      NG: CHECK AND REPAIR BRAKE FLUID LEAKAGE  (See SYSTEM DIAGRAM )

      OK: Go to next step 

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH 
   1. Disconnect the A26 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 (+/-0.197 in.) from the MIN level.
   Fig 1: Identifying Brake Fluid Level Warning Switch Terminals And Brake Fluid Level

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A26-1 - A26-2	Float UP (Switch off)	1.9 to 2.1 kΩ
   A26-1 - A26-2	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.

   NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY  (See DISASSEMBLY )

   OK: Go to next step 

3. CHECK HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH - SKID CONTROL ECU) 
   1. Disconnect the A24 skid control ECU connector and A26 brake fluid level warning switch connector.
   2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A24-41 (LBL) - A26-2 (LBL)	Always	Below 1 Ω
   A24-41 (LBL) - Body ground	Always	10 kΩ or higher
   A26-1 (GND) - Body ground	Always	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 2: Identifying A24 Skid Control ECU And A26 Brake Fluid Level Warning Switch Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

4. RECONFIRM DTC 
   1. Clear the DTC (See DTC CHECK/CLEAR ).
   2. Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.
   3. Check if the same DTC is output (See DTC CHECK/CLEAR ).

   HINT:

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

   Result 

   RESULT REFERENCE
   
   

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

   B: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )