TM 9--2350--292--20--1
0019 00--3
AUXILIARY POWER UNIT FAILS TO KEEP RUNNING -- CONTINUED
0019 00
F
Is 24 V dc present?
CONTINUED FROM STEP E
no
yes
CONTINUED ON NEXT PAGE
G
no
yes
1. Disconnect harness 3W730 lead 76B from
upper fuel pump.
2. Place multimeter red lead on harness
3W730 lead 76B and black lead to ground.
3. Turn MASTER switch ON
(TM 9--2350--292--10).
4. Turn FUEL SHUTOFF switch ON
(TM 9--2350--292--10).
5. Check for voltage.
6. Turn FUEL SHUTOFF and MASTER
switches OFF.
7. Reconnect harness 3W730 lead 76B to
upper fuel pump.
Replace upper fuel
pump (WP 0615 00).
Verify fault is corrected.
1. Disconnect harness 3W730 connector P1
from APU relay box connector J1.
2. Place one multimeter lead on harness
3W730 P1 socket 5 and other lead on
harness 3W730 lead 76B. Check for
continuity.
Is continuity present?
Repair (WP 0290 00) or
replace (WP 0654 00)
harness 3W730. Verify
fault is corrected.
Replace relay box
(WP 0662 00). Verify
fault is corrected.
