TM 9--2350--292--20--1
0012 00--1
AUXIILIARY POWER UNIT FUEL SOLENOID FAILS TO ENERGIZE.
0012 00
THIS WORK PACKAGE COVERS:
Auxiliary Power Unit Fuel Solenoid Fails To Energize
INITIAL SETUP:
Tools and Special Tools
General mechanic’s tool kit (item 1, WP 0717 00)
Multimeter (item 84, WP 0717 00)
Equipment Conditions
Vehicle MASTER switch OFF (TM 9--2350--292--10)
APU cover removed (WP 0413 00)
Personnel Required
Two
Is 24 V dc present?
1. Remove APU preheater relay/fuel solenoid
access cover (WP 0624 00).
2. Turn MASTER switch ON
(TM 9--2350--292--10).
3. Place multimeter red lead on lead 421 at
solenoid and multimeter black lead to ground.
Check for voltage.
4. Turn MASTER switch OFF
(TM 9--2350--292--10).
no
yes
Notify Direct Support
Maintenance.
A
WARNING
Remove rings, bracelets, wristwatches,
and neck chains before working on any
vehicle. Jewelry can catch on equip-
ment and cause injury, or may short
across an electrical circuit and cause
severe burns or electrical shock.
CONTINUED ON NEXT PAGE
Is 24 V dc present?
1. Disconnect harness 4W700 P1 from APU
control box.
2. Turn MASTER switch ON
(TM 9--2350--292--10).
3. Place multimeter red lead in harness 4W700
P1 socket N and black lead to ground. Check
for voltage.
4. Turn MASTER switch OFF
(TM 9--2350--292--10).
no
yes
B
Repair (WP 0290 00) or replace
(WP 0332 00) harness 4W700.
Verify fault is corrected.
