TM 9--2350--292--20--1
0039 00--4
PURGE PUMP FAILS TO OPERATE (PURGE PUMP CANNOT BE HEARD
OPERATING WHEN TURNED ON) -- CONTINUED
0039 00
CONTINUED FROM STEP G
Does purge pump operate?
1. Reconnect harness 3W202 P1 to engine
disconnect receptacle J3.
2. Turn MASTER switch and ENGINE PREHEAT
switch ON (TM 9--2350--292--10) and listen for
purge pump to operate.
H
no
yes
Replace purge solenoid
(WP 0225 00). Verify
fault is corrected.
Replace purge pump
(WP 0225 00). Verify
fault is corrected.
Is 24 V dc present?
1. Remove switch panel from bracket (WP 0242 00)
and reattach ground strap to switch panel.
2. Disconnect harness 4W101 P1 from switch panel.
3. Turn MASTER switch ON and FUEL PUMP switch
to PURGE (TM 9--2350--292--10).
4. Place multimeter red lead on pin C of switch panel
receptacle and black lead to ground. Check for
voltage.
5. Turn MASTER switch and FUEL PUMP switch
OFF (TM 9--2350--292--10).
no
yes
I
Is 24 V dc present?
1. Disconnect harness 4W105 P1 from switch
panel.
2. Turn MASTER switch ON
(TM 9--2350--292--10).
3. Place multimeter red lead on harness 4W105
P1 pin E and black lead to ground. Check for
voltage.
4. Turn MASTER switch OFF
(TM 9--2350--292--10).
J
Go to step P.
no
yes
Repair (WP 0290 00) or replace
(WP 0317 00) harness 4W105.
Verify fault is corrected
CONTINUED ON NEXT PAGE
CONTINUED FROM STEP E