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PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A46

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DTC Code DTC Name
C1A46 Yaw Rate Sensor
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DESCRIPTION

The skid control ECU assembly receives electronically controlled brake system signals from the yaw rate sensor and sends the signals to the driving support ECU assembly and network gateway ECU. If the skid control ECU assembly detects that the yaw rate sensor is malfunctioning, the skid control ECU 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, a yaw rate sensor malfunction signal is received from the skid control ECU assembly for 1 second or more.

  • Electronically controlled brake system

  • Skid control ECU assembly

  • Driving support ECU assembly
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PROCEDURE


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    CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. Check for DTCs.

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      1. Chassis > ABS/VSC/TRC > Trouble Codes


      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

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    REPLACE SKID CONTROL ECU ASSEMBLY


    1. Replace the skid control ECU assembly with a new one.

      for LHD:Click here

      for RHD:Click here

      Result
      Proceed to
      NEXT

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    CHECK FOR DTCs (PRE-CRASH 2)


    1. Clear the DTCs.

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      1. Body Electrical > Pre-Crash 2 > 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.

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      1. Body Electrical > Pre-Crash 2 > Trouble Codes


      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.

      Result
      Result Proceed to
      DTC C1A46 is not output A
      DTC C1A46 is output B

    • A

      END (SKID CONTROL ECU ASSEMBLY WAS DEFECTIVE)

    • B

      REPLACE DRIVING SUPPORT ECU ASSEMBLYClick here