TM 10-3930-675-24-1
BOOM LIFTING/LOWERING TROUBLESHOOTING - CONTINUED
0040 00
Table 3. Error Code 151 - Lift Cylinder Locking Valve, Wiring Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 151 - Lift Cylinder Locking Valve, 1. Enter "DIAG SERVO" 11(13)
Inspect locking valve solenoids
Wiring Circuit Failure.
in the diagnostic menu. Should
for damage and proper connector.
have 24V when activating
boom lowering function.
2. Disconnect the connectors
a. If no voltage (24V) is found,
from 6001 and 6002 from the
check continuity of locking
lift cylinder locking valves.
valve harness.
Check voltage between the two
b. If voltage (24V) is found,
pins of each connector with the
check resistance of locking
ignition ON. Should have
DIAG SERVO
11(13)
valve solenoids (6001 and
OUTPUT/INPUT
voltage 24V during the
6002). The resistance should
FAN
0mA
0mA
lowering function.
be 18 to 20 Ohms.
BL.VALVE 0.00V
0mA
c. Replace damaged or open
locking valve harness.
d. Replace locking valve (WP
0252 00).
3. Check voltage 24V at X159 a. If no voltage (24V) is found,
pin 2 with the ignition ON.
disconnect ECU (790)
Should have 24V (WP 0048
connector 2 and check pin 3
00-8).
for damage and check
continuity of wire A1592 (WP
0048 00-8).
b. Repair or replace damaged
wires or connectors (WP 0113
00).
c. Replace damaged ECU (790)
(WP 0080 00).
4. Remove the engine cover to a. If no voltage (24V) at X167
access X167 and check voltage
pin 15, check continuity of
(24V) at X167 pin 14 and 15
wires GY and BK going to
with the ignition ON (WP 0048
X159 (WP 0048 00-8).
00-8).
b. If no voltage (24V) is found at
X167 pin 14, check locking
valves (6001 and 6002)
soleniod harness for damage
and continuity (WP 0048 00-
8).
c. Replace damaged or open
locking valve harness.
d. Notify Sustainment
Maintenance to replace
damaged or open X159 to
X167 harness.
0040 00-3
