TM
55-1730-229-12
AG
320A0-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
Table 4-2.
Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
97.
(continued)
b.
Check resistance between pin 5 on FCU torque motor receptacle
and case of torque motor using a multimeter set to lowest
range. Multimeter should indicate zero ohms. If not, re-
place FCU (paragraph 4-67).
c.
Check resistance between pins 1 and 3 on FCU torque motor
receptacle (FO-3, sheet 2). Resistance should be 30 to 37.5
ohms. If not, replace FCU (paragraph 4-67).
Disconnect fuel line (9, figure 4-50) from fuel shutdown
d.
solenoid (8). Install tee part number 969176-1 in shutdown
solenoid and connect fuel line (9). to tee. Connect a 0 to
600 psig pressure gauge to other fitting on tee.
e.
Disconnect electrical connector P7 from ignition unit (6,
between pins A(-). and B(+) on ignition unit connector.
f.
Disconnect fuel solenoid electrical connector P9 (5, figure
Observe starter duty cycle.
Perform engine start procedure while observing multimeter and
g.
pressure gauge. At 10 percent rpm, multimeter should indi-
cate 28 vdc and pressure gauge should indicate IO psig mini-
mum. At 20 percent rpm pressure gauge should indicate 22
psig minimum. Record readings obtained at 10 percent rpm and
20 percent rpm. When readings are obtained set ENGINE
CONTROL switch to STOP and MASTER SWITCH OFF. Disconnect
battery.
h.
Replace FCU if requirements of step g were not met.
i.
Reconnect electrical connector of FCU.
Perform engine start procedure and record reading on pressure
j.
gauge at 20 percent rpm. When reading is obtained set ENGINE
CONTROL switch to STOP, and MASTER SWITCH OFF. Disconnect
battery.
4-130
