TM 10-3930-675-20-1
0040 00-7
BOOM LIFTING/LOWERING TROUBLESHOOTING - CONTINUED
0040 00
Table 4. Error Code 152 - Lift Cylinder Locking Valve, Component Failure
Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 152 - Lift Cylinder Locking Valve,
Component Failure - Continued
4. Remove engine cover and
forward junction box X167
cover.
5. Ensure that ignition switch is
in OFF position. Disconnect
electrical leads from junction
box X167 pin 14 and pin 15.
Check wires from 6001 and
6002 to junction box X167 for
damage
and
continuity.
Check for continuity to
chassis
and
continuity
between black and gray wires.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If continuity (short) to chassis,
repair or replace connectors
(WP 0111 00).
c. Replace
locking
valve
solenoids (6001 and 6002) if
voltage is as specified (WP
0169 00).
6. Connect wires at junction box
X167.
7. Disconnect connector X159
and check continuity between
pin 1 and pin 2 on lower
connector
part.
Check
continuity between pin 1 and
chassis and pin 2 and chassis.
If continuity is present, repair or
replace cable from connector
X159 to junction box X167 (WP
0111 00).
8. Check continuity between
ECU (790) connector 2 pin 10
and connector X159 pin 1.
Check continuity between
ECU (790) connector 2 pin 3
and connector X159 pin 2.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If continuity (short) to chassis,
repair or replace connectors
(WP 0111 00).
9. Enter DIAG SERVO 11
(13) menu and check voltage
of
BL.VALVE.
Voltage
should be 20-25V with
joystick activated to lower
boom.
If voltage is not as specified,
replace ECU (790) (WP 0079
00).