DTC B1143-13: IG2 Relay Control Circuit Malfunction (FBCM): Notes

DTC B1143:13 (FBCM) DETECTION CONDITION AND POSSIBLE CAUSE

Description	IG2 relay control circuit malfunction
Detection condition	Front body control module (FBCM) detects an open circuit or short to ground in the IG2 relay 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 Short to ground in the wiring harness between start stop unit terminal 2D and front body control module (FBCM) terminal 2U 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

Courtesy of MAZDA MOTORS CORP.