PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A50

DTC Code DTC Name
C1A50 Brake System

DESCRIPTION

When the driving support ECU receives an electronically controlled brake system malfunction signal from the skid control ECU via the CAN communication line, DTC C1A50 is stored.

DTC No. DTC Detection Condition Trouble Area
C1A50 When the vehicle speed is 5 km/h (4 mph) or more, a airbag sensor assembly (yaw rate sensor) malfunction signal is received from the brake booster with master cylinder assembly (skid control ECU).

  • CAN communication system

  • Electronically controlled brake system

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Tech Tips

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection.

PROCEDURE


  1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check for electronically controlled brake system DTCs Click here.

      OK
      Electronically controlled brake system DTCs are not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

  2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY


    1. Replace the brake booster with master cylinder assembly (skid control ECU) (See page for LHD, Click here for RHD).


    NEXT

  3. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Drive the vehicle.

    7. Recheck for DTCs.

      Result
      Result Proceed to
      DTC C1A50 is not output. A
      DTC C1A50 is output (for LHD). B
      DTC C1A50 is output (for RHD). C

    A

    END (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    C

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here