ECV SHUTS DOWN OR DOESN'T START.

TM 10-5410-228-24

2.8

UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued.

31. ECV SHUTS DOWN OR DOESN'T START.

Check for any loose or

NOTE: LMS operating system interfaces with

disconnected plugs at or near

the ECV fuel solenoid and neutral safety circuit.

engine fuel solenoid and

neutral safety switch. Refer to

TM 9-2320-387-24-1.

Does

Disconnect fuel pump cutoff wire 54A

Yes

engine crank

connection cable 1A1W1.

but does not

Remove wire at fuel solenoid.

start?

Insert ECV wire 54A into fuel solenoid.

Refer to TM 9-2320-387-24-1.

Does

Yes

Disconnect wires 14, 14A,

test across the two

engine start?

and 14B from cable

wires.

1A1W1 wires at neutral

safety switch and

reconnect ECV 14 to 14A

and 14 to 14B.

Refer to

TM 9-2320-387-24-1.

Does

engine start?

Yes

Gain access to vehicle control box (see

Remove relay A8K2.

Apply 24 Vdc across pins X1 and X2.

Test for continuity between pins A1 &

A2 and B1 & B2.