PRE-COLLISION SYSTEM, Diagnostic DTC:C1A50

DTC Code DTC Name
C1A50 Brake System Malfunction

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A50

Brake System Malfunction

The ignition switch is ON and a brake system malfunction signal is continuously received from the brake actuator assembly (skid control ECU) for 2 seconds or more while the IG voltage is 10 V or more.

  • Vehicle stability control system

  • Pre-collision city sensor

  • Brake actuator assembly (skid control ECU)

CAUTION / NOTICE / HINT

Note:

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

  • If the pre-collision city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Pre-collision City Sensor Optical Axis Learning.

    Tip:

    Pre-collision City Sensor Optical Axis Learning can be performed by using either One Time Recognition or Sequential Recognition.

    One Time Recognition:Click here

    Sequential Recognition:Click here

  • 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 with troubleshooting.

    Click here

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

      Chassis > ABS/VSC/TRC > Trouble Codes

    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

      Chassis > PCS/LDA/RSA/LVN > Clear DTCs

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

      Tip:

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

    3. Check for DTCs.

      Click here

      Chassis > PCS/LDA/RSA/LVN > Trouble Codes

    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-collision city sensor.

      Click here

    2. Perform Pre-collision City Sensor Optical Axis Learning.

      Tip:

      Pre-collision City Sensor Optical Axis Learning can be performed by using either One Time Recognition or Sequential Recognition.

      One Time Recognition:Click here

      Sequential Recognition:Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK FOR DTCS

    1. Clear the DTCs.

      Click here

      Chassis > PCS/LDA/RSA/LVN > Clear DTCs

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

      Tip:

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

    3. Check for DTCs.

      Click here

      Chassis > PCS/LDA/RSA/LVN > Trouble Codes

    Result

    Result

    Proceed to

    DTC C1A50 is not output

    A

    DTC C1A50 is output

    B
    A

    END (PRE-COLLISION CITY SENSOR WAS DEFECTIVE)

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    Click here