CAN COMMUNICATION SYSTEM(for LHD), 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 CAN communication bus, each ECU informs the other ECUs that it is connected to the network by outputting a specified signal (periodic signal) onto the CAN communication bus on a regular schedule. The multiplex tilt and telescopic ECU detects the connection of each ECU based on the signal.

DTC Code DTC Detection Condition Trouble Area
B2621 Periodic signal from the specified ECU has stopped.

  • MS bus circuit

  • Multiplex tilt and telescopic ECU branch wire or connector

  • Main body ECU (cowl side junction block LH) CAN main wire or connector

  • Multiplex tilt and telescopic ECU

  • Main body ECU (cowl side junction block LH)

WIRING DIAGRAM

A01X1R0E01
*a Main Body ECU (Cowl Side Junction Block LH)
*b No. 8 Junction Connector
*c Multiplex Tilt and Telescopic ECU

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B2621 is output alone A
      DTC B2621 and U1115 and/or U1002 are output B

      Tech Tips

      When DTC B2621 and U1115 and/or U1002 are output simultaneously, perform the troubleshooting for DTC U1115 and/or U1002 first.


    A

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here