PRE-COLLISION SYSTEM, Diagnostic DTC:C1A46

DTC Code DTC Name
C1A46 Yaw Rate Sensor

DESCRIPTION

The skid control ECU (brake actuator assembly) receives vehicle stability signals from the airbag sensor assembly (yaw rate sensor) and sends the signals to the driving support ECU assembly. If the skid control ECU (brake actuator assembly) detects that the airbag sensor assembly (yaw rate sensor) is malfunctioning, the skid control ECU (brake actuator assembly) 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 sensor assembly (yaw rate sensor) malfunction signal is received from the skid control ECU (brake actuator assembly) for 10 second or more.

  • Vehicle stability control system

  • Skid control ECU (brake actuator assembly)

  • Driving support ECU assembly

INSPECTION PROCEDURE

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 DTC (ABS/VSC/TRAC)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    5. Check for DTCs.

      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 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)


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


    NEXT

  3. CHECK FOR DTC (PRE-COLLISION 2)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs Click here.

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

      Tech Tips

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

    5. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.

    6. Check for DTCs.

      OK
      DTC C1A46 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    OK

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