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 239 of 1205
TM
9-2320-387-24-l
ENGINE COOLING
DIAGNOSTIC
FLOWCHART
TEST OPTIONS
1. STE/ICE-R TEST 91 (Page 2-508)
2. MULTIMETER
REASON FOR QUESTlON
KNOWN INFO
FAN DRIVE OK
FAN WON’T DISENGAGE
CONTROL VALVE OK
The need to test out the ground
connection of the time-delay
module and control valve.
DISCONNECT THE 4-WIRE
CONNECTOR ON THE TIMER.
IS THERE CONTINUITY
FROM
WIRE 938 ON THE HARNESS SIDE
OF THE 4-WAY CONNECTOR-
TO-ENGINE,GROUND?
PCSSIBLE
PROBLEMS
TIME-DELAY
MODULE
WIRING
HYDRAULIC
SYSTEM
C6
t
KNOWN INFO
T OPTIONS
1. STEIICE-R TEST 91 (Page 2-508)
,
2. MULTIMETER
FAN DRIVE OK
FAN WON’T DISENGAGE
CONTROL VALVE OK
RECONNECT THE 4-WIRE
CONNECTOR.
IS THERE ABOUT
580R FROM WIRE 938 ON THE
TIMER SIDE OF THE 2-WIRE
COUPLING TO ENGINE
GROUND?
POSSIBLE
PROBLEMS
REASON
FOR QUESTION
This measurement
will help to tell
you if the time-delay
module is OK.
TIME-DELAY
MODULE
WIRING
HYDRAULIC
SYSTEM
TIME-DELAY
I
KNOWN INFO
I
I C7
I
TEST
OPTIONS
IS THERE CONTINUITY
FROM
WIRE 458B IN THE 4-WIRE
CONNECTOR
HARNESS TO WIRE
4588 AT THE FAN TEMPERATURE
SWITCH?
1. STUICE-R
TEST 91 (page 2-508)
2. MULTIMETER
FAN DRIVE OK
FAN WONT DISENGAGE
CONTROL VALVE OK
1
POSSIBLE
PROBLEMS
1
REASON
FOR QUESTION
This measurement
will help tell you
if the trme-delay module is OK.
TIME-DELAY
MODULE
WIRING
HYDRAULIC
SYSTEM
2-l 82
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