TWO STEADY MODE LIGHTS ILLUMINATE ON CENTRAL TIRE INFLATION SYSTEM (CTIS) ECU (CONT)

TM 9-2320-366-20-3

m1. TWO STEADY MODE LIGHTS ILLUMINATE ON CENTRAL TIRE INFLATION SYSTEM (CTIS) ECU (CONT)

m1.

KNOWN INFO

TEST OPTIONS

10.

Air hoses from wet tank

Soapy Water Leak Test

to manifold valve

Are intermediate axle tee

REASON FOR QUESTION

assembly OK.

fittings free from leaks

Air compressor and

CTIS may be unable to

and damage?

governor adjustment OK.

reach selected pressure

Wheel valves venting OK.

and two lights will flash if

Manifold valve assembly

air leaks from CTIS air

relief valve OK.

hoses during inflation/

Manifold valve assembly

deflation sequences.

OK.

Quick release valves OK.

Rear axle quick release

valve fittings OK.

Intermediate axle quick

release valve fittings OK.

POSSIBLE PROBLEMS

Faulty intermediate

axle tee fittings.

Faulty front quick

Tighten loose air hoses.

release valve fittings.

Replace damaged air hoses

Faulty front tee fittings.

and/or fittings (para 23-2).

Faulty manifold valve

assembly delivery port

fittings.

Faulty cab floor supply

hose fittings.

YES

Faulty supply hoses from

quick release valve(s) to

wheel valve(s).

Faulty wheel valve filters.

Faulty electrical connections

at CTIS ECU and manifold

valve assembly.

Faulty ECU.

2-2026