PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A50

DTC Code DTC Name
C1A50 Brake System Malfunction

DESCRIPTION

If the vehicle speed exceeds the set speed on a downhill slope, for example, the pre-crash safety city sensor sends brake control signals to the brake actuator assembly (skid control ECU) to provide deceleration control. This DTC is output when a malfunction occurs in the vehicle stability control system controlled by the brake actuator assembly (skid control ECU).

DTC Code DTC Detection Condition Trouble Area
C1A50 The ignition switch is ON and a brake system malfunction is continuously received from the brake actuator assembly (skid control ECU) for 0.2 seconds or more.

  • Vehicle stability control system

  • Pre-crash safety city sensor

    Brake actuator 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 (VEHICLE STABILITY CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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
      Vehicle stability control system DTCs are not output A
      Vehicle stability control system DTCs are output B

    B

    GO TO VEHICLE STABILITY CONTROL 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-CRASH SAFETY CITY SENSOR


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


    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 ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here