TM 9-2320-362-14&P
Table 3-2.
Unit Troubleshooting (Cont’d)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7.
COOLANT TEMPERATURE GAGE DISPLAYS NORNAL READING AND STATUS INDICATOR
ALARM AND LIGHT
Condition:
ARE ON
light
(REFER To FIGURES 3-1 THRU 3-3)
engine has been running 10 to 15 minutes.
Both
and alarm tests on status indicator are normal.
NOTE
l
When measuring voltage, measure against ground.
l
Normal coolant temperature is 190-230° F.
l
Before starting procedure, see para 1-1.
Step 1.
Disconnect cable W64 from connector 12J1 on tach/hourmeter
box .
Step 2.
Using multimeter, measure voltage at connector 12J1, pin
"A",
on tach/hourmeter box.
If multimeter displays correct voltage (fig 3-3), go
to step 3.
If multimeter does
3), go to step 5.
Step 3.
Reconnect cable W64 to
box .
Disconnect cable
NOT display correct voltage (fig 3-
connector 12J1 on tach/hourmeter
W64 from connector on shelter.
Step 4.
Using multimeter, measure voltage at cable W64, pin “A.”
If multimeter displays correct voltage (fig 3-3),
refer to system manual for further troubleshooting.
If multimeter does NOT display correct voltage (fig 3-
3), replace faulty cable assembly W64 (para 3-25).
Step 5.
Reconnect cable W64 to connector 12J1 on tach/hourmeter
box .
Remove engine access cover and disconnect safety
lanyard.
Disconnect cable W66 from connector 12J2 on
tach/hourmeter box.
Step 6.
Using multimeter, measure voltage at cable W66, pin “A.”
If multimeter displays
replace faulty harness
If multimeter does NOT
3), go to step 7.
correct voltage (fig 3-3),
assembly (para 3-20).
display correct voltage (fig 3-
.
3-18
