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DTC B1142 13: IG1 Relay Circuit Malfunction: Notes

DTC B1142 13 DETECTION CONDITION AND POSSIBLE CAUSE

Description  IG1 relay circuit malfunction 
Detection condition 
  • Front body control module (FBCM) detects an open circuit in the IG1 relay circuit for 2 s or more  with the ignition switched ON (engine off or on).
Fail-safe function  Not applicable
Possible cause 
  • IG1 relay malfunction
  • Front body control module (FBCM) connector or terminal malfunction
  • IG1 relay circuit malfunction
    • C/U IG1 15 A fuse malfunction
    • Open circuit in the wiring harness between IG1 relay terminal C and front body control module (FBCM) terminal 2M
  • Front body control module (FBCM) malfunction
G09771794Courtesy of MAZDA MOTORS CORP.