PRE-COLLISION SYSTEM, Diagnostic DTC:C1A47

DTC Code DTC Name
C1A47 Steering Angle Sensor

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) receives steering rotation angle information from the spiral cable with sensor sub-assembly (steering angle sensor), and sends the information to the driving support ECU assembly via CAN communication.

If the skid control ECU (brake booster with master cylinder assembly) detects a malfunction of the spiral cable with sensor sub-assembly (steering angle sensor), it sends a malfunction signal to the driving support ECU assembly and stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A47 Steering Angle Sensor While the vehicle speed is 50 km/h (31 mph) or more, a spiral cable with sensor sub-assembly (steering angle sensor) malfunction signal is received from the skid control ECU (brake booster with master cylinder assembly) for 2 seconds or more.

  • Electronically controlled brake system

  • Skid control ECU (brake booster with master cylinder 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 power 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
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  2. REPLACE SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)


    1. Replace the skid control ECU (brake booster with master cylinder 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 power 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 C1A47 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    OK

    END (SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) WAS DEFECTIVE)