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

11.

Air hoses from wet tank

Soapy Water Leak Test

to manifold valve

Is CTIS front quick release

REASON FOR QUESTION

assembly OK.

valve fittings free from

CTIS may be unable to

Air compressor and

leaks and damage?

reach selected pressure

governor adjustment OK.

and two lights will flash if

Wheel valves venting OK.

air leaks from CTIS air

Manifold valve assembly

hoses during inflation/

relief valve OK.

deflation sequences.

Manifold valve assembly

OK.

Quick release valves OK.

Rear axle quick

release valve fittings OK.

Intermediate axle quick

release valve fittings OK.

Intermediate axle tee

fittings OK.

POSSIBLE PROBLEMS

Tighten loose air lines.

Replace damaged air lines

Faulty front quick

and/or fittings (para 23-2).

release valve fittings.

Faulty front tee fittings.

Faulty manifold valve

assembly delivery port

fittings.

YES

Faulty cab floor supply

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.

2-2028