TM 10-3930-675-20-1
0040 00-14
BOOM LIFTING/LOWERING TROUBLESHOOTING - CONTINUED
0040 00
Table 8. Error Code 158 - Lift Cylinder Boom Down Valve, Component Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 158 - Lift Cylinder Boom Down
Valve, Component Failure - Continued
8. Check continuity between
connector X159 pin 1 and
connector X158 pin 3.
If continuity is not present,
repair or replace connectors (WP
0111 00).
9. Enter DIAG SERVO 9 (13)
menu and check current of
OUTPUT LOWER. Current
should
be
present
with
joystick activated to lower
boom.
If current is not present, replace
ECU (790) (WP 0079 00).