Train EB when departing. TC reported Rear M1 A4 door open. TC reset EB ok. Fault recurred at BBT1. ~~~~~ Train EB when departing. TC reported Rea     ER & fault trace downloaded to PTU006.Train EB due to door open in motion detected,Door close s/w signal detected but door lock s/w signal not detected.Door lock device checked ok.Door lock s/w found out of criteria causing intermittent lost in signal.Door close s/w checked ok.No FOD found,adjusted mating strip,pull/push resistance within criteria.Door cyclic test ok. Checked by Koh/Jack. 23/09/21