Code Definition

B1007 — Multiplex integrated control unit communication with combination switch control module lost

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

About B1007

B1007 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.

B1007 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) communicates with the Combination Switch Control Module, which is the electronics module integrated into the steering column multifunction stalk assembly controlling turn signals, headlights, high beams, fog lights, and windshield wipers. DTC B1007 is set when the MICU detects a loss of communication with this module — specifically when the headlight switch and turn signal messages are no longer received over the multiplex data link within the expected communication cycle. The combination switch module sends operator input data to the MICU, ...

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