TM 9-2320-387-24-l
ENGINE COOLING
KNOWN INFO
I
FAN BLADES OK
SERPENTINE
BELT OK
FAN TEMPERATURE
SWITCH OK
FAN DRIVE OK
POSSIBLE
PROBLEMS
TP SENSOR
TIME-DELAY
MODULE
FAN CUT-OFF WIRING
KNOWN INFO
FAN OK
SERPENTINE
BELT OK
FAN TEMPERATURE
SWITCH OK
PCB OK
TP SENSOR OK
FAN CUT-OFF WIRING OK
POSSIBLE
PROBLEMS
TIME-DELAY
MODULE
IS THERE CONTINUITY FROM
WIRE 315D AT THE TIME-DELAY
MODULE TO WIRE 3158 AT THE TP
SENSOR OR FAN CUT-OFF
SWITCH? (DISCONNECT THE
WIRES TO MAKE THE
MEASUREMENT.)
DIAGNOSTIC FLOWCHART
T OPTIONS
1. STVICE-R
TEST 91 (Page 2-508:
2. MULTfMETER
REASON FOR QUESTION
The TP sensor and fan cut-off
switch will disengage the fan for 20
seconds.
HOLD THE INJECTOR PUMP
WIDE OPEN WITH THE
ROTARY SWITCH IN RUN.
IS THERE BATTERY VOLTAGE
ON THE TIMER END OF
WIRE 315D?
;T OPTIONS
1. STE/ICE-R TEST 69 (Page 2-506
2. MULTIMETER
REASON FOR QUESTION
This will simulate the TP sensor
and fan cut-off system’s ability to
disengage the fan.
2-l 72
