TM 10-3930-675-24-1
BOOM LIFTING/LOWERING TROUBLESHOOTING - CONTINUED
0040 00
Table 4. Error Code 152 - Lift Cylinder Locking Valve, Component Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 152 - Lift Cylinder Locking Valve, 1. Enter "DIAG SERVO" 11(13) Inspect locking valve solenoids
Component Failure.
in the diagnostic menu. Should for damage and proper
have 24V when activating connection.
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
DIAG SERVO
11(13)
ignition ON. Should have
OUTPUT/INPUT
valve solenoids (6001 and
FAN
0mA
0mA
voltage 24V during the
6002). The resistance should
BL.VALVE 0.00V
0mA
lowering function.
be 18 to 20 Ohms.
c. Replace damaged or shorted
locking valve harness.
d. Replace locking valve (WP
0252 00).
3. Check voltage 24V at X159 a. If 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 wire
A1592 for continuity to
ground (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) is found at
access X167 and check voltage
X167 pin 15, check wires GY
24V at X167 pin 14 and 15
and BK going to X159 for
with the ignition ON (WP 0048
continuity to ground (WP
00-8).
0048 00-8).
b. If no voltage (24V) is found at
X167 pin 14, check locking
valves (6001 and 6002)
solenoid harnesses for damage
and continuity to ground (WP
0048 00-8).
c. Replace damaged or shorted
locking valve harness.
d. Replace damaged or open
X159 to X167 harness (WP
0113 00).
0040 00-4
