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

to manifold valve

REASON FOR QUESTION

assembly OK.

Is CTIS quick release

If air leaks continuously

from quick release valve(s)

Air compressor and

valve(s) free from leaks

during inflation or deflation,

governor adjustment OK.

and damage?

CTIS will not to selected

Wheel valves venting OK.

tire pressure and two

Manifold valve assembly

steady mode lights will

relief valve OK.

illuminate.

Manifold valve assembly

OK.

POSSIBLE PROBLEMS

Faulty CTIS quick release

valve(s).

Faulty rear axle quick

release valve fittings.

Faulty intermediate axle

quick release valve

fittings.

Faulty intermediate

Replace or clean quick

axle tee fittings.

release valve(s)

Faulty front quick

(para 12-8 or 12-9).

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.

2-2020