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Home >> Mazda >> 2023 >> MX-5 Miata Club >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> On-Board Diagnostic - Start Stop Unit >> DTC B13C3-29: Communication Error Between Start Stop Unit And LF Control Unit [Start Stop Unit] >> Notes

DTC B13C3-29: Communication Error Between Start Stop Unit And LF Control Unit [Start Stop Unit]: Notes

DTC B13C3:29 (START STOP UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

Description Communication error between start stop unit and LF control unit
Detection condition
  • Start stop unit detects the communication error with the LF control unit 10 times.
Fail-safe
  • Inhibits the door lock/unlock control using the advanced keyless entry system.
Possible cause
  • LF control unit connector or terminal malfunction
  • Start stop unit connector or terminal malfunction
  • Short to ground in wiring harness between start stop unit terminal 2F and LF control unit terminal I
  • Open circuit in wiring harness between start stop unit terminal 2F and LF control unit terminal I
  • LF control unit malfunction
  • Start stop unit malfunction
G15747507Courtesy of MAZDA MOTORS CORP.