TM 9-2320-364-20-32-19483. ALL TIRES ON AXLES NO. 3 THROUGH NO. 5 WILL NOT DEFLATE (CONT).7.Is the deflate valve operatingproperly?Replace deflatevalve (Para 13-10).Verify repair, go toStep 8 of this Fault.YESNOTires on Axles No. 3 throughNo. 5 inflate.Tires on Axles No. 1 and No. 2deflate.CTIS lines and componentsnot leaking.CTIS wire harnessconnections OK.CTIS controller OK.Wiring harness OK.Rear manifold OK.Deflate valve solenoid OK.Deflate valve faulty.KNOWN INFOPOSSIBLE PROBLEMSTEST OPTIONSREASON FOR QUESTIONVisual inspection.Deflate valve which remainsclosed will prevent proper tiredeflation.