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

Air hoses from wet tank

Visual Inspection and

to manifold valve

Soapy Water Leak Test

Are rear axle quick

REASON FOR QUESTION

assembly OK.

release valve fittings

Air compressor and

CTIS may be unable to

free from leaks and

governor adjustment OK.

reach selected pressure

damage?

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.

POSSIBLE PROBLEMS

Faulty rear axle quick

release valve fittings.

Faulty intermediate axle

quick release valve

fittings.

Faulty intermediate

axle tee fittings.

Tighten loose air hoses.

Faulty front quick

Replace damaged air hoses

release valve fittings.

or fittings (para 23-2).

Faulty front tee fittings.

Faulty manifold valve

assembly delivery port

fittings.

Faulty cab floor supply

YES

hose fittings.

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.

2-2022