Code No. B1646: Coding data mismatch


caution
  • If diagnosis code No. B1646 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.

FUNCTION



TROUBLE JUDGEMENT



PROBABLE CAUSES



  • Malfunction of CAN bus line
  • Malfunction of ETACS-ECU
  • Malfunction of SRS-ECU

DIAGNOSIS PROCEDURE
1.M.U.T.-III CAN bus diagnostics
2.M.U.T.-III other system diagnosis code
3.Check whether the diagnosis code is reset.