PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A50

DTC Code DTC Name
C1A50 Brake System Malfunction

DESCRIPTION

When the pre-crash brake control and pre-crash brake assist control are performed, the pre-crash safety city sensor sends a brake control signal to the brake booster with master cylinder assembly (skid control ECU). If a malfunction occurs in the VSC system, which is controlled by the brake booster with master cylinder assembly (skid control ECU), DTC C1A50 is stored

DTC Code DTC Detection Condition Trouble Area
C1A50 The ignition switch is ON and a brake system malfunction is continuously received from the brake booster with master cylinder assembly (skid control ECU) for 2 seconds or more.

  • Electronically controlled brake system

  • Pre-crash safety city sensor

    Brake booster with master cylinder assembly (skid control ECU)

CAUTION / NOTICE / HINT

Note


  • When replacing the pre-crash safety city sensor, replace it with a new one. If an ECU which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed to troubleshooting Click here.

  • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".


PROCEDURE


  1. CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  2. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1A50 is not output A
      DTC C1A50 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE PRE-COLLISION CITY SENSOR


    1. Replace the pre-crash safety city sensor Click here.

    2. Perform pre-crash safety city sensor learning.


      • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".



    NEXT

  4. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs Click here.

      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 (PRE-CRASH SAFETY CITY SENSOR WAS DEFECTIVE)

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) Click here

    C

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) Click here