PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A47

DTC Code DTC Name
C1A47 Steering Angle Sensor

DESCRIPTION

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

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

DTC No. DTC Detection Condition Trouble Area
C1A47 While the vehicle speed is 50 km/h (31 mph) or more and approximately 1 second or more elapse after power switch is on (IG), a steering angle sensor malfunction signal is received from the brake booster with master cylinder (skid control ECU).

  • CAN communication system

  • Steering angle sensor

  • Brake booster with master cylinder (skid control ECU)

  • Driving support ECU assembly

INSPECTION PROCEDURE

Tech Tips

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection.

PROCEDURE


  1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Check DTCs for the electronically controlled brake system Click here.

      OK
      Electronically controlled brake system DTC is not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

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


    1. Replace the brake booster with master cylinder (skid control ECU) Click here (for LHD), Click here (for RHD)).


    NEXT

  3. CHECK DTC OUTPUT (PRE-CRASH SAFETY 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: Body Electrical / Pre-Crash 2 / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Drive the vehicle and attempt to reproduce the conditions present when the DTC was detected.

    7. Recheck for DTCs.

      OK
      DTC C1A47 is not output.

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    OK

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