TM 9--2350--292--20--1
0009 00--10
AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED
0009 00
Is continuity present?
1. Reconnect harness 3W711 P1 at APU engine
disconnect.
2. Disconnect harness 4W700 P1 at APU
control box.
3. Place one multimeter lead on harness 4W700
P2 pin J and other lead in harness 4W700 P1
socket B. Check for continuity.
X
no
yes
CONTINUED ON NEXT PAGE
CONTINUED FROM STEP W
Repair (WP 0290 00) or replace (WP 0332 00)
harness 4W700. Verify fault is corrected.
Is continuity present?
1. Hold PREHEAT switch to MOM ON
(TM 9--2350--292--10).
2. Place one multimeter lead on control box
receptacle pin B and other lead on receptacle
pin D. Check for continuity.
no
yes
Y
Replace APU control
box (WP 0247 00).
Verify fault is corrected.
Is continuity present?
1. Reconnect harness 4W700 P1 to APU control
box.
2. Disconnect harness 3W711 P1 at APU engine
disconnect.
3. Place one multimeter lead in harness 3W702
P1 socket A and other lead in harness 3W702
J1 socket E. Check for continuity.
no
yes
Z
Repair (WP 0290 00) or replace
(WP 0311 00) harness 3W702 .
Verify fault is corrected.
