TM 10-3930-675-24-1
BOOM IN/OUT TROUBLESHOOTING - CONTINUED
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Table 4. Error Code 161 - Extension Cylinder Boom IN Control, Component Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 161 - Extension Cylinder Boom IN 1. Enter "DIAG SERVO" 10(13) a. If no "OUTPUT" mA values
Control, Component Failure.
in the diagnostic menu and
display, perform
activate the boom in function.
troubleshooting steps for
BOOM IN "OUTPUT" and
ERROR CODE 127.
"INPUT" should have mA b. If no "INPUT" mA values
values during boom in
display, continue with step 2.
function.
CAUTION
DIAG SERVO
10(13)
Uncontrolled function may occur with this error code.
OUTPUT/INPUT
BOOM IN
0mA
0mA
2. Check voltage at X158 a. If voltage (16 to 24V) is found,
BOOM OUT 0mA
0mA
between pin 5 and pin 6 with
disconnect X158 and check
the ignition ON (WP 0048 00-
the resistance on the loose part
8). Should be 0V with the
of X158 between pin 5 and pin
joystick in the neutral position
6. Resistance should be 23 to
and 6 to 16V during the boom
25 Ohms. Check continuity of
IN function.
each pin to ground.
b. If no voltage (6 to 16V) is
found, disconnect ECU (790)
connector 2 and check
continuity of wire A1586 and
continuity of wire to ground
(WP 0048 00-8).
c. Repair or replace damaged,
shorted wires or connectors
(WP 0113 00).
d. Replace damaged ECU (790)
(WP 0080 00).
3. Move the cab to the transport a. If resistance (23 to 25 Ohms)
position (TM 10-39306-675-
is not as specified or shorted to
10). Remove the thin cover
ground, replace servo control
plate just in front of the cab
valve (WP 0250 00).
hose tray to gain access to the b. If specified resistance is
servo
Check
found, check continuity of
resistance of 6007 solenoid.
wires 1585 and 1586 and
Should be 23 to 25 Ohms.
check continuity of each wire
Check solenoid for short to
to ground (WP 0048 00-8).
ground.
c. Notify Sustainment
Maintenance to replace
damaged open or shorted
harness.
d. Replace ECU (790) (WP 0080
00).
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