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Home >> Mazda >> 2015 >> 3 SV, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Connectivity Master Unit >> DTC B1252 87: Communication Error With Auxiliary Jack/USB Port/SD Card Slot Hub >> Notes
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DTC B1252 87: Communication Error With Auxiliary Jack/USB Port/SD Card Slot Hub: Notes

DTC B1252:87 DETECTION CONDITIONS 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 cannot receive a signal from the auxiliary jack/USB port/SD card slot hub.
Fail-safe function  Not applicable
Possible cause 
  • Auxiliary jack/USB port/SD card slot hub connector or terminal malfunction
  • Connectivity master unit connector or terminal malfunction
  • Open circuit in wiring harness between the following terminals:
    • Connectivity master unit terminal 4B and auxiliary jack/USB port/SD card slot hub terminal 2B
    • Connectivity master unit terminal 4D and auxiliary jack/USB port/SD card slot hub terminal 2D
  • Software error
    • USB driver malfunction
  • Auxiliary jack/USB port/SD card slot hub malfunction
  • Connectivity master unit malfunction
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