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

Relief Valve Test

to manifold valve

REASON FOR QUESTION

assembly OK.

Is relief valve on

A damaged relief valve

Air compressor and

manifold valve assembly

may cause continual air

governor adjustment OK.

operating?

loss and prevent proper

Wheel valves venting OK.

inflation of tires for CTIS

POSSIBLE PROBLEMS

mode.

Faulty manifold valve

assembly relief valve.

Faulty manifold valve

assembly.

Faulty quick release

valve(s).

Faulty rear axle quick

release valve fittings.

Faulty intermediate axle

quick release valve

fittings.

Faulty intermediate

Replace relief valve

axle tee fittings.

(para 12-7).

Faulty front quick

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.

2-2016