TIMS show obstacle detected when train doors open at Front DT A4 door. Fault cleared when train door s closed. Fault recurred at WDL SB. Staff(SBW) checked, feed back nothing abnormal. ~~~~~ 3709 TIMS show obstacle detected @A4 when train open door. Fault cleared when train doors closed. Fault recurred at WDL SB. Staff (SBW) checked, feedback nothing abnormal.ERS-10  3709 A4 door no FOD was found. Cleaned J-rail with dry lint-free cloth & door cyclic test 20x on 3709 A4 door - Done. No fault or any abnormal defects was found.  Kamarulzaman 44051