Inspection Procedure

HINT:

When C1364/61 is output together with C1341/62, C1342/63, C1343/64 and C1344/65, inspect and repair the trouble areas indicated by C1364/61 first.

1. CHECK BRAKE FLUID LEAKAGE 
   1. Check that there is no fluid leakage in the brake line between the brake actuator and the wheel cylinder which is the cause of DTCs.
   2. Check for a brake fluid leak from the connection between the accumulator pump and brake actuator (see DTC C1202/68 MASTER RESERVOIR LEVEL MALFUNCTION  ).
   3. Check that the brake is not dragging.

      OK: There is no fluid leakage or dragging. 

   NG: REPAIR OR REPLACE APPLICABLE PART 

   OK: Go to Next Step 

2. PERFORM AIR BLEED 
   1. Bleed the air from the front and rear brake systems (see BRAKE FLUID ).
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND) 
   1. Disconnect the A19 and A21 ECU connectors.
   2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying A19 And A21 ECU Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      A19-17 (FRA+) - Body ground	Always	10 kΩ or higher
      A19-18 (FRA-) - Body ground	Always	10 kΩ or higher
      A19-4 (FRR+) - Body ground	Always	10 kΩ or higher
      A19-3 (FRR-) - Body ground	Always	10 kΩ or higher
      A19-19 (RLA+) - Body ground	Always	10 kΩ or higher
      A19-20 (RLA-) - Body ground	Always	10 kΩ or higher
      A19-34 (RLR+) - Body ground	Always	10 kΩ or higher
      A19-33 (RLR-) - Body ground	Always	10 kΩ or higher
      A21-17 (FLA+) - Body ground	Always	10 kΩ or higher
      A21-18 (FLA-) - Body ground	Always	10 kΩ or higher
      A21-4 (FLR+) - Body ground	Always	10 kΩ or higher
      A21-3 (FLR-) - Body ground	Always	10 kΩ or higher
      A21-20 (RRA+) - Body ground	Always	10 kΩ or higher
      A21-21 (RRA-) - Body ground	Always	10 kΩ or higher
      A21-34 (RRR+) - Body ground	Always	10 kΩ or higher
      A21-33 (RRR-) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

4. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR - BODY GROUND) 
   1. Disconnect the A27 actuator connector.
   2. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying A27 Brake Actuator Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      A27-5 (FRA-) - Body ground	Always	10 kΩ or higher
      A27-6 (SMC2) - Body ground	Always	10 kΩ or higher
      A27-7 (BS2) - Body ground	Always	10 kΩ or higher
      A27-8 (FRA+) - Body ground	Always	10 kΩ or higher
      A27-9 (RLA-) - Body ground	Always	10 kΩ or higher
      A27-10 (RLA+) - Body ground	Always	10 kΩ or higher
      A27-11 (RRA-) - Body ground	Always	10 kΩ or higher
      A27-12 (RRA+) - Body ground	Always	10 kΩ or higher
      A27-13 (FLA+) - Body ground	Always	10 kΩ or higher
      A27-14 (FLA-) - Body ground	Always	10 kΩ or higher
      A27-19 (BS1) - Body ground	Always	10 kΩ or higher
      A27-20 (SMC1) - Body ground	Always	10 kΩ or higher
      A27-21 (FRR-) - Body ground	Always	10 kΩ or higher
      A27-22 (FRR+) - Body ground	Always	10 kΩ or higher
      A27-23 (RLR-) - Body ground	Always	10 kΩ or higher
      A27-24 (RLR+) - Body ground	Always	10 kΩ or higher
      A27-25 (RRR-) - Body ground	Always	10 kΩ or higher
      A27-26 (RRR+) - Body ground	Always	10 kΩ or higher
      A27-27 (FLR+) - Body ground	Always	10 kΩ or higher
      A27-28 (FLR-) - Body ground	Always	10 kΩ or higher

   NG: REPLACE HARNESS AND CONNECTOR 

   OK: Go to Next Step 

5. READ VALUE OF TECHSTREAM (WHEEL CYLINDER PRESSURE SENSOR)  (See INSPECTION PROCEDURE  )

   NG: REPLACE BRAKE ACTUATOR  (See REMOVAL  )

   OK: Go to Next Step 

6. RECONFIRM DTC 
   1. Clear the DTCs (see DTC CHECK / CLEAR  ).
   2. Repeat the braking test under malfunction conditions recreated based on the "FREEZE FRAME DATA" (see FREEZE FRAME DATA  ).
   3. Check if the same DTCs are 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 CHART
      
      

      Result	Proceed To
      DTCs (C1341/62, C1342/63, C1343/64 and C1344/65) are not output	A
      DTCs (C1341/62, C1342/63, C1343/64 and C1344/65) are output	B

   B: REPLACE BRAKE ACTUATOR  (See REMOVAL  )

   A: END