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
