Code Definition

B1006 — Multiplex integrated control unit communication with door multiplex control module lost

System: Body  |  Type: Manufacturer-Specific  |  Make: Honda

About B1006

B1006 is a manufacturer-specific body diagnostic trouble code recorded for Honda vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1006 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Honda Multiplex Integrated Control Unit (MICU) serves as the central body electronics controller, managing communication between multiple subsystem modules over the vehicle's multiplex network. DTC B1006 is set when the MICU loses communication with the Door Multiplex Control Module, which is responsible for operating power windows, door locks, power mirrors, and courtesy lighting within the door assemblies. The MICU continuously monitors the serial data link to the Door Multiplex Control Module and triggers this code when valid messages are no longer received within the expected communica...

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