Inspection Procedure

1. Check that the brake fluid level is sufficient.

   HINT:

   • When releasing the parking brake, set the chocks to hold the vehicle for safety.
   • If the fluid level drops, check for a fluid leak, and repair if found.
   • If no leak exists, add and adjust fluid and then check that the trouble code is not output again.

   OK: 

   Brake fluid level is proper. 

NG: CHECK AND REPAIR BRAKE FLUID LEAKAGE AND ADD FLUID 

OK: Go to next step 

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.

   Fig 1: Disconnecting Brake Fluid Level Warning Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   1-2	Float up (Switch OFF)	1.84 to 2.16 kΩ
   1-2	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 with the power switch ON (IG).

NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY 

OK: Go to next step 

1. Disconnect the A15 ECU connector.
2. Disconnect the A22 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A15-13 (LBL) - A22-2 (LBL)	Below 1 Ω
   A15-13 (LBL) - Body ground	10 kΩ or higher
   A22-1 (GND) - Body ground	Below 1 Ω

Fig 2: Identifying A15 ECU And A22 Switch Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the A15 ECU connector.
2. Disconnect the A22 switch connector.
3. Turn the power switch ON (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A22-2 - Body ground	8 to 14 V

   Fig 3: Identifying A22 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SKID CONTROL ECU  (See REMOVAL  )

OK: Go to next step 

1. Clear the DTCs (see DTC CHECK/CLEAR  ).
2. Turn the power switch ON (IG).
3. Check if the same DTC is recorded (see DTC CHECK/CLEAR  ).

   HINT:

   Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

   Result 

   RESULT REFERENCE
   
   

   Condition	Proceed to
   DTC (C1202/68) is output	A
   DTC (C1202/68) is not output	B

   HINT:

   If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE  ).

B: END 

A: REPLACE SKID CONTROL ECU  (See REMOVAL  )