TEST OPTIONS
REASON FOR QUESTION
YES
NO
Visual Inspection
If air is not present from
pressure protection valve,
pressure protection valve
is faulty.
Is air present from
pressure protection
valve?
3.
KNOWN INFO
Front and rear air
gages read 120 psi.
Air hoses and fittings
free from leaks.
POSSIBLE PROBLEMS
Faulty pressure protection
valve.
Faulty main air supply hose.
Faulty CTIS manifold input
hose.
Faulty electrical system.
Replace pressure
protection valve (para 11-27).
m5. CENTRAL TIRE INFLATION SYSTEM (CTIS) ECU INDICATES NO FAULT CODE BUT SYSTEM
FAILS TO INFLATE OR DEFLATE (CONT)
TM 9-2320-365-20-2
2-1866 Change 1