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PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A50

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DTC Code DTC Name
C1A50 Brake System
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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
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CAUTION / NOTICE / HINT

Tip:

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

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PROCEDURE


  1. Click here

    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.

  2. Click here

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY


    1. Replace the brake booster with master cylinder assembly (skid control ECU) (Click here).


  3. Click here

    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.

      OK
      DTC C1A50 is not output.

    • OK

      END (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY WAS DEFECTIVE)

    • NG

      REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)