FIVE CENTRAL TIRE INFLATION SYSTEM (CTIS) ECU INDICATOR LIGHTS FLASHING (cont)

TM 9-2320-366-20-3

WARNING

The sudden release of high pressure air

can cause damage to eyes. Wear

appropriate eye protection when working

near pressurized air. Failure to comply

may result in injury to personnel.

(1) Check to see if vehicles is equipped vent cover

and vent cover is in good condition.

(2) If vehicle is not equipped with vent cover or vent

cover is damaged perform steps (4) through (18)

of this test.

(3) If vehicle is equipped with vent cover and vent

cover is in good condition, go to step 2 of this

fault.

(4) Disconnect CTIS manifold valve vent hose from

CTIS manifold valve assembly.

(5) Disconnect CTIS manifold valve vent hose from

bulkhead fitting in cab floor.

(6) Check to see if CTIS manifold valve vent hose or

bulkhead fitting is plugged or restricted.

(7) If CTIS manifold vale vent hose and bulkhead

fitting are not plugged or restricted, go to step 2

of this fault.

(8) If CTIS manifold valve vent hose or bulkhead

fitting is plugged or restricted, clean CTIS

manifold valve vent hose and bulkhead fitting

(para 2-43).

(9) Connect CTIS manifold valve vent hose to CTIS

manifold valve assembly.

(10) Connect CTIS manifold valve vent hose to

bulkhead fitting in cab floor.

(11) Remove two screws and washer from front grille.

(12) Remove screw, washer, and front grille from cab.

NOTE

Perform step (13) if vent cover is damaged.

(13) Remove retaining nut and vent cover from

bulkhead fitting. Discard retaining nut and

vent cover.

NOTE

Part number 12422659 is required for step

(14).

(14) Install vent cover on bulkhead fitting with

retaining nut.

(15) Position front grille on cab with washer and

screw.

(16) Position two washers and screws in front grille.

(17) Tighten screw to 48-60 lb-in. (5-7 N.m).

(18) Tighten two screws to 24 lb-in. (3 N.m).

Change 2

2-2071