The faulty train, made by Kawasaki Heavy Industries, has been in service for 35 years.
LTA and SMRT said all the Kawasaki Heavy Industries trains running on Thursday have passed the axle box functionality checks.
There are currently 48 such trains in operation.
“SMRT engineers and technicians have worked continuously since yesterday to restore and replace the track and trackside equipment, and works are ongoing,” they added.
“LTA and SMRT’s priority is to resume train service as soon as possible.”
President of SMRT Trains Lam Sheau Kai said: “We understand that many commuters are affected by this incident. My team and I have worked hard throughout the night, and we are doing our very best to recover train services safely on the affected stretch. The safety of our commuters and staff is our topmost priority.”