Train doors not proven closed. TC reported front M2, A-3 door slow in closing. TC recycled twice to clear fault. Staff(CCK) assisted to isolate front M2. A-3 do or in close position. ~~~~~ 3507 Train doors not proven closed. TC reported front M2(2507), A-3 door slow in closing. TC recycled twice to clear fault. Staff(CCK) assisted to isolate front M2. A-3 door in close position.  2507 A3 Door Replace door manifold and function test ok. CR test point output 3.328 bar ok. old:N.A new:110027 notif:2509199 Done by Koh/Sanip/Rizman 45133