PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A46

DTC Code DTC Name
C1A46 Yaw Rate Sensor

DESCRIPTION

The brake actuator assembly (skid control ECU) receives vehicle stability control system signals from the airbag ECU assembly (yaw rate sensor) and sends the signals to the driving support ECU assembly. If the brake actuator assembly (skid control ECU) detects that the airbag ECU assembly (yaw rate sensor) is malfunctioning, the brake actuator assembly (skid control ECU) sends a malfunction signal to the driving support ECU assembly, and the driving support ECU assembly stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A46 Yaw Rate Sensor While the vehicle speed is 5 km/h (3 mph) or more, an airbag ECU assembly (yaw rate sensor) malfunction signal is received from the brake actuator assembly (skid control ECU) for 1 second or more.

  • Vehicle stability control system

  • Brake actuator assembly (skid control ECU)

  • 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.

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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. REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)


    1. Replace the brake actuator assembly (skid control ECU) with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTCs


    1. Clear the DTCs.

      Click here


      Body Electrical > Pre-Crash 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-Crash 2 > Trouble Codes
      Result
      Result Proceed to
      DTC C1A46 is not output A
      DTC C1A46 is output B

    A

    END (BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU] WAS DEFECTIVE)

    B

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here