TM 10-3930-675-24-1
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0007 00
Table 6. Auxiliary Pump Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Auxiliary Pump Not Working - Continued.
6. Check voltage at ECU 792 pin
a. If no voltage (24V) is found
48 while pressing the
at ECU 792 pin 48, check
auxiliary pump switch.
continuity of wires A474,
474, and A1744 (WP 0048
00-47).
b. Repair or replace damaged
wires or connectors (WP
0113 00).
7. Check voltage (24V) at 350-1
a. If no voltage (24V) is found,
solenoid located on top of the
check voltage (24V) at the
auxiliary pump motor. Should
circuit breakers (F51-1 and
have voltage (24V) at the
FS1-2) mounted under the
large terminal with the cable
auxiliary pump (WP 0048 00-
(W30) connected to it.
33 and WP 0048 00-47).
b. Replace damaged or faulty
circuit breakers (WP 0074
00).
c. Repair or replace damaged
wires or connectors (WP
0113 00).
8. Press the auxiliary pump
a. If no voltage (24V) is found,
switch and check voltage
test 350-1 solenoid (WP 0113
(24V)
between
motor
00).
+terminal and motor ground
b. If 350-1 solenoid damaged or
terminal.
faulty, replace auxiliary
pump (WP 0165 00).
c. If voltage (24V) is found,
replace auxiliary pump (WP
0165 00).
d. Repair loose or disconnected
ground cables (WP 0048 00-
47).
9. Check voltage (24V) at 350-1
a. If no voltage (24V) is found
solenoid pin 86 (top spade
at 350-1 pin 86, remove relay
terminal) while pressing the
350 and test (WP 0113 00 and
auxiliary pump switch. Check
WP 0048 00-47).
ground connections (bottom
b. Replace damaged or faulty
spade terminal) of solenoid
relay (WP 0074 00).
and motor.
c. Check continuity of wires
251, 252, A251, A251A, and
A671A (WP 0048 00-47).
d. Repair or replace damaged
wires or connectors (WP
0113 00).
0007 00-72
