TM 9-2320-365-20-2
2-1800
NO
YES
2.
Are CTIS wheel seals
free from leaks at
affected wheel(s)?
CTIS Wheel Seal Test
Air pressure at wet tank OK.
Tires OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Four CTIS ECU indicator
lights may flash if CTIS
wheel seal is damaged.
Faulty CTIS wheel
seal(s).
Faulty kneeling
valve(s) at front
wheel(s).
Faulty CTIS wheel
valve(s).
Faulty air hoses from
quick release valve
to affected wheel(s).
Faulty front axle
quick release valve.
Faulty rear axle
quick release valve(s).
Faulty rear axle
quick release valve
fittings.
Faulty front axle quick
release valve fittings.
Faulty front tee
fittings.
Faulty manifold valve
assembly delivery port
fittings.
Faulty cab floor air
hose fittings.
Faulty manifold valve
assembly.
Faulty CTIS ECU.
Replace CTIS wheel
seal (para 10-2).
m2. FOUR CTIS ECU INDICATOR LIGHTS FLASHING (CONT)