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Home >> Mazda >> 2017 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC B1DA1-14; Top Lock Motor Circuit Malfunction >> Notes
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DTC B1DA1-14; Top Lock Motor Circuit Malfunction: Notes

Description Top lock motor circuit malfunction
Detection condition
  • The retractable fastback control module cannot receive a signal from the top lock motor while the top lock motor is operating.
Fail-safe
  • Stops retractable fastback operation
Possible cause
  • Open circuit in wiring harness between the following terminals:
    • Retractable fastback control module terminal 2B and top lock motor terminal E
    • Retractable fastback control module terminal 2F and top lock motor terminal A
    • Retractable fastback control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A
  • CABIN+ 50 A fuse malfunction
  • RHT L 30A fuse malfunction
  • Short to ground in wiring harness between the following terminals:
    • Retractable fastback control module terminal 2B and top lock motor terminal E
    • Retractable fastback control module terminal 2F and top lock motor terminal A
  • Retractable fastback control module malfunction
  • Top lock motor malfunction
Fig 1: Retractable Fastback Control Module Communication Diagram (B1DA1 14)
G11275651Courtesy of MAZDA MOTORS CORP.