PRE-COLLISION SYSTEM, Diagnostic DTC:C1A64

DTC Code DTC Name
C1A64 Brake Control Signal Mismatch

DESCRIPTION

The skid control ECU (brake actuator assembly) sends signals to the driving support ECU assembly according to the brake control status. If the driving support ECU assembly receives an vehicle stability control system malfunction signal from the skid control ECU (brake actuator assembly), it will store DTC C1A64.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A64 Brake Control Signal Mismatch While the engine switch is on (IG), the driving support ECU assembly receives an vehicle stability control system malfunction signal from the skid control ECU (brake actuator assembly) continuously for 0.5 seconds or more.
  • Vehicle stability control system

  • Skid control ECU (brake actuator assembly)

  • Driving support ECU assembly

CAUTION / NOTICE / HINT

Note


  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

  • The pre-collision system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

    Tech Tips

    Pre-collision system DTC C1A64 may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first.


    1. 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
    A
  2. CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Clear DTCs
    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


      Body Electrical > Pre-Collision 2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A64 is not output A
      DTC C1A64 is output B

    A
    B
  3. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  4. CHECK FOR DTCs (PRE-COLLISION SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Collision 2 > Clear DTCs
    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


      Body Electrical > Pre-Collision 2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A64 is not output A
      DTC C1A64 is output B

    A
    B