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Home >> Mazda >> 2021 >> MX-5 Miata Club, Standard Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC B1D9A-79: Exceeds Maximum Number Of Pulse Counts For Front Roof Link Motor (LH) [Retractable Hardtop Control Module] >> Notes
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DTC B1D9A-79: Exceeds Maximum Number Of Pulse Counts For Front Roof Link Motor (LH) [Retractable Hardtop Control Module]: Notes

DTC B1D9A:79 (RETRACTABLE HARDTOP CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description Exceeds maximum number of pulse counts for front roof link motor (LH)
Detection condition
  • The retractable hardtop control module detects a pulse signal exceeding the maximum number of the pulse counts from the front roof link motor (LH).
Fail-safe
  • Stops retractable hardtop operation
Possible cause
  • Front roof link motor (LH) is disengaged from front roof link (motor idling)
  • Front roof link motor (LH) malfunction
  • Retractable hardtop control module malfunction
System wiring diagram Not applicable