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DTC B1D9A-23; Front Roof Link Motor (LH) Pulse Input Circuit Malfunction: Notes

Description Front roof link motor (LH) pulse input circuit malfunction
Detection condition
  • The retractable fastback control module cannot detect a pulse signal from the front roof link motor (LH) when the front roof link 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 4T and front roof link motor (LH) terminal D
    • Retractable fastback control module terminal 4S and front roof link motor (LH) terminal B
    • Retractable fastback control module terminal 4V and front roof link motor (LH) terminal F
  • Short to ground in wiring harness between the following terminals:
    • Retractable fastback control module terminal 4T and front roof link motor (LH) terminal D
    • Retractable fastback control module terminal 4S and front roof link motor (LH) terminal B
  • Short to power supply in wiring harness between the following terminals:
    • Retractable fastback control module terminal 4T and front roof link motor (LH) terminal D
    • Retractable fastback control module terminal 4V and front roof link motor (LH) terminal F
  • Line-to-line short circuit in wiring harness between the following terminals:
    • Front roof link motor (LH) terminal D and front roof link motor (LH) terminal B
    • Front roof link motor (LH) terminal D and front roof link motor (LH) terminal F
    • Front roof link motor (LH) terminal B and front roof link motor (LH) terminal F
  • Retractable fastback control module malfunction
  • Front roof link motor (LH) malfunction
Fig 1: Retractable Fastback Control Module Communication Diagram (B1D9A 23)
G11275640Courtesy of MAZDA MOTORS CORP.