DTC B12B8-87: Communication Error With Auxiliary Jack/USB Port/SD Card Slot Hub [Connectivity Master Unit]: Notes

DTC B12B8:87 [CONNECTIVITY MASTER UNIT] DETECTION CONDITION AND POSSIBLE CAUSE

Description	Communication error with auxiliary jack/USB port/SD card slot hub
Detection condition	With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a signal from the auxiliary jack/USB port/SD card slot hub for 10 s or more.
Fail-safe	Not applicable
Possible cause	Auxiliary jack/USB port/SD card slot hub connector or terminal malfunction Connectivity master unit (CMU) connector or terminal malfunction Open circuit in wiring harness between the following terminals: Connectivity master unit (CMU) terminal 6B-Auxiliary jack/USB port/SD card slot hub terminal 3B Connectivity master unit (CMU) terminal 6D-Auxiliary jack/USB port/SD card slot hub terminal 3D Auxiliary jack/USB port/SD card slot hub malfunction Connectivity master unit (CMU) malfunction
Courtesy of MAZDA MOTORS CORP.