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Home >> Mazda >> 2017 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC B1DA0-23; Top Lock Motor Pulse Input Circuit Malfunction >> Notes
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DTC B1DA0-23; Top Lock Motor Pulse Input Circuit Malfunction: Notes

Description Top lock motor pulse input circuit malfunction
Detection condition
  • The retractable fastback control module cannot detect a pulse signal from the Top lock motor when the Top lock motor operation starts.
Fail-safe
  • Stops retractable fastback operation
Possible cause
  • Open circuit in wiring harness between the following terminals:
    • Retractable fastback control module terminal 4X and Top lock motor terminal F
    • Retractable fastback control module terminal 4Y and Top lock motor terminal B
    • Retractable fastback control module terminal 4W and Top lock motor terminal D
  • Short to ground in wiring harness between the following terminals:
    • Retractable fastback control module terminal 4X and Top lock motor terminal F
    • Retractable fastback control module terminal 4W and Top lock motor terminal D
  • Short to power supply in wiring harness between the following terminals:
    • Retractable fastback control module terminal 4X and Top lock motor terminal F
    • Retractable fastback control module terminal 4Y and Top lock motor terminal B
  • Line-to-line short circuit in wiring harness between the following terminals:
    • Top lock motor terminal F and top lock motor terminal D
    • Top lock motor terminal F and top lock motor terminal B
    • Top lock motor terminal D and top lock motor terminal B
  • Retractable fastback control module malfunction
  • Top lock motor malfunction
Fig 1: Retractable Fastback Control Module Communication Diagram (B1DA0 23)
G11275649Courtesy of MAZDA MOTORS CORP.