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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 461 (Automatic Drive Positioner (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B2128: UART Communication Line >> DTC Description >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2128

UART COMM

The communication between driver seat control unit and automatic drive positioner control unit is interrupted for a period of time.

  • UART communication line

    (UART communication line is open or shorted)

  • Driver seat control unit
  • Automatic drive positioner control unit