LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2019 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Front Body Control Module (FBCM) >> DTC B1143-13: IG2 Control Circuit Malfunction [Front Body Control Module (FBCM)] >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B1143-13: IG2 Control Circuit Malfunction [Front Body Control Module (FBCM)]: Notes

DTC B1143:13 [FRONT BODY CONTROL MODULE (FBCM)] DETECTION CONDITION AND POSSIBLE CAUSE

Description IG2 control circuit malfunction
Detection condition
  • Front body control module (FBCM) detects an open circuit in the IG2 control circuit for 2 s or more with the ignition switched ON (engine off or on).
Fail-safe Not applicable
Possible cause
  • Start stop unit connector or terminal malfunction
  • Front body control module (FBCM) connector or terminal malfunction
  • Open circuit in the wiring harness between start stop unit terminal 2D and front body control module (FBCM) terminal 2U
  • Start stop unit malfunction
  • Front body control module (FBCM) malfunction
G13447287Courtesy of MAZDA MOTORS CORP.