TIMS showed rear M1 car smoke and fire detector loss power. Fault self cleared. ~~~~~ * ,N * Checked and confirmed 1537 smoke and fire detector loss of power. Further checks found PS DC to DC converter faulty. Replaced new DC to DC PS, fault cleared. Monitored for 30 min. with no fault reoccurrence. DONE BY:LAI/MUTALIB 14.12.2023