PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2056

DTC Code DTC Name
B2056 Axial Gap of Radar Sensor

DESCRIPTION

This DTC is stored when the beam axis of the millimeter wave radar sensor is not aligned with the direction the vehicle is traveling. If the beam axis adjustment is not performed after installing a new millimeter wave radar sensor, the pre-crash safety system DTC B2056 is output, and when the vehicle speed is 40 km/h (25 mph) or more, the dynamic radar cruise control system DTC P1572 is output.

DTC Code DTC Detection Condition Trouble Area
B2056 The engine switch is on (IG) and the beam axis of the millimeter wave radar sensor is determined to be misaligned.

  • Millimeter wave radar sensor

  • Seat belt control ECU

  • Distance control ECU

PROCEDURE


  1. CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)


    1. Using the intelligent tester, enter the following menus: Powertrain / Radar Cruise / Trouble Code.

    2. Clear the DTC Click here.

    3. Perform the following to make sure the DTC detection conditions are met.

      Tech Tips

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


      1. Drive the vehicle at a speed of 40 km/h (25 mph) or more.

      2. Turn the cruise control main switch on to set the vehicle-to-vehicle distance control mode to the standby state.

    4. Check for DTCs Click here.

      OK
      DTC P1572 is not output.

    NG

    GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM Click here

    OK

  2. CHECK DTC (PRE-CRASH SAFETY SYSTEM)


    1. Using the intelligent tester, enter the following menus: Body / Pre-Crash / Trouble Code.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to

      OK

      (DTC B2056 is not output)

      		 A

      NG

      (for LHD)

      		 B

      NG

      (for RHD)

      		 C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE SEAT BELT CONTROL ECU Click here

    C

    REPLACE SEAT BELT CONTROL ECU Click here