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DTC B2321: Driver Side Door ECU Communication Stop [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is stored when LIN communication between the power window regulator motor assembly (for driver door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No. DTC Detection Condition Trouble Area
B2321 No communication between power window regulator motor assembly (for driver door) and main body ECU (multiplex network body ECU) for 10 seconds or more.
  • Power window regulator motor assembly (for driver door)
  • Main body ECU (multiplex network body ECU)
  • Multiplex network master switch assembly
  • Wire harness or connector