POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM, Diagnostic DTC:B2621

DTC Code DTC Name
B2621 Communication Interruption

DESCRIPTION

The multiplex tilt and telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that they are connected to the network by outputting a specified signal (periodical signal) to the communication bus at a regular schedule. The multiplex tilt and telescopic ECU detects the connection of each ECU based on the signal.

DTC Code Detection Item Trouble Area
B2621 Periodical signal from the specified ECU has stopped.

  • CAN communication system

  • Main body ECU

  • Front power seat switch LH*1 or RH*2 (Position control ECU)

  • Combination meter

  • Multiplex tilt and telescopic ECU

Tech Tips

*1: for LHD

*2: for RHD

PROCEDURE


  1. CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Check the DTC of the CAN communication system Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output: LHD B
      DTC is output: RHD C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (MAIN BODY ECU COMMUNICATION SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the intelligent tester on.

    3. Select "J/B" from the Data List.

    4. Check the signal communication state of the main body ECU on the tester screen.

      Tilt & Telescopic:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      J/B Communication state of main body ECU signal/OK or Interruption

      OK: Communication is normal

      Interruption: Communication is interrupted

      		 -
      OK
      "OK" is displayed.

    NG

    REPLACE MAIN BODY ECU

    OK

  3. READ VALUE USING INTELLIGENT TESTER (DRIVER SEAT ECU COMMUNICATION SIGNAL)


    1. Select "Seat ECU Info" from the Data List.

    2. Check the signal communication state of the front power seat switch LH*1 or RH*2 (position control ECU) on the tester screen.

      Tech Tips

      *1: for LHD

      *2: for RHD

      Tilt & Telescopic:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Receive from Seat ECU Communication state of seat ECU signal/OK or Interruption

      OK: Communication is normal

      Interruption: Communication is interrupted

      		 -
      OK
      "OK" is displayed.

    NG

    REPLACE FRONT POWER SEAT SWITCH (DRIVER SEAT ECU) Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (COMBINATION METER ECU COMMUNICATION SIGNAL)


    1. Select "Meter ECU Info" from the Data List.

    2. Check the signal communication state of the main body ECU on the tester screen.

      Tilt & Telescopic:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Receive from Meter Communication state of main body ECU signal/OK or Interruption

      OK: Communication is normal

      Interruption: Communication is interrupted

      		 -
      OK
      "OK" is displayed.

    OK

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    NG

    REPLACE NO. 1 METER ECU SUB-ASSEMBLY Click here