PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2059

DTC Code DTC Name
B2059 Vehicle Speed Malfunction

DESCRIPTION

The distance control ECU and the skid control ECU use CAN communication to send vehicle speed information to the seat belt control ECU. The distance control ECU receives vehicle speed information from the skid control ECU via the combination meter and ECM. This DTC is output when the difference between the vehicle speed information from the distance control ECU and the skid control ECU is more than the specified value.

DTC No. DTC Detection Condition Trouble Area
B2059 Difference between vehicle speed information from distance control and skid control ECU is more than specified value

  • CAN communication system

  • Combination meter assembly

  • ECM

  • Skid control ECU

  • Distance control ECU

  • Seat belt control ECU

WIRING DIAGRAM

A015ZHUE10

INSPECTION PROCEDURE

Note

When the seat belt control ECU is replaced with a new one, Initialization must be performed Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      CAN communication system DTC is not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (SFI SYSTEM)


    1. Check DTC for SFI system Click here.

      OK
      SFI system DTC is not output.

    NG

    GO TO SFI SYSTEM Click here

    OK

  3. CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)


    1. Turn the engine switch off.

    2. Start the engine.

    3. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 60 seconds.

    4. Check DTC for vehicle stability control system Click here.

      OK
      Vehicle stability control system DTC is not output.

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Body / Combination Meter / Data List.

    5. Check the Data List for proper functioning of the vehicle speed meter.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed Meter Vehicle speed/Min: 0 km/h (0 mph), Max: 255 km/h (158 mph) Almost same as actual vehicle speed (When driving) -
      OK
      Vehicle speed displayed on the intelligent tester is almost the same as the actual vehicle speed.

    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  5. REPLACE DISTANCE CONTROL ECU


    1. Replace the distance control ECU Click here.

    2. Initialize the distance control ECU Click here.


    NEXT

  6. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      DTC B2059 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    END