TM-9-2320-387-24-1

TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1

DECEMBER 1997

CHANGE 1

TM-9-2320-387-24-1 - Page 192 of 1205

TM

9-2320-387-24-l

FUEL SYSTEM

KNOWN INFO

WHITE SMOKE

POSSIBLE

PROBLEMS

COOlANT

IN

CYLINDERS

K

II

KNOWN INFO

MAINTENANCE

.

.

I

i>

0

FROM Hl,

Page 2-128

ENGINE WONT SHUT

OFF

TEST OPTIONS

POSSIBLE

PROBLEMS

1

DOES THE ENGINE LOSE

EXCESSIVE COOLANT?

I

DIAGNOSTIC

FLOWCHART

.

iT OPTIONS

LOOK AT COOLANT

LEVEL IN

SURGE TANK.

REASON

FOR QUESTION

If the engine loses coolant but not

from leaks in the lines, hoses, heater

or radiator, it may have a crack or

I

blown gasket in ihe engine.

FUEL SOLENOID

I

ROTARY SWITCH OK

SOLENOID

WIRING

USE PLIERS TO SQUEEZE FUEL

RETURN LINE AT INJECTION

PUMP.

NONE

REASON

FOR TEST STEP

\

There is an internal injector

pump problem that is preventing

procedure will cause it’to stall.

Ll

1

TEST OPTIONS

1

I

RECONNECT BODY CONNECTOR.

I

1. STEIICE-R

TEST 89

DISCONNECT ENGINE

(Page 2-505)

I

CONNECTOR

FROM PROTECTIVE

CONTROL BOX.

I

2. MULTIMETER

I

IS VOLTAGE 0 AT WIRE 54A AT

THE FUEL SOLENOID?

I

REASON

FOR QUESTION

If there is a voltage reading, there

is a short in the wiring harness.

REPAIR SHORT

CONNECTOR

2-132