TM 10-3930-675-24-1
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0007 00
Table 2. Electrical Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
26.Multiple Boom or Tophandler Functions Not
b. No sideshift, no 20/40
Working (Multiple Error Codes) - Continued.
spread, and no twistlock
operation. Multiple error
codes.
c. No rotate, no tilt, no
oscillate, and no twistlock
lights on boom. Multiple
error codes.
2. Check for emergency stop in
Disengage emergency stop
engaged position. (Multiple
button. (Error codes 121 and 201
error codes will display if the
will normally be one of the error
emergency stop button is
codes displayed.)
engaged during crank and
start.)
3. Check voltage (24V) at X159 a. If voltage is 6V or less, unplug
pin 1 with the ignition on.
X158, turn the ignition off,
(Checking the common 24V
then back on after 3 minutes.
output from ECU 790
Recheck voltage.
connector 2 pin 10; any short b. If the voltage (24V) returns to
to ground causes the voltage to
X159 pin 1, check continuity
drop to 6V or less (WP 0048
of each pin of the loose part of
00-8).)
X158 to ground (WP 0048 00-
8).
c. If the voltage (24V) does not
return, unplug X159, turn the
ignition off, then back on after
3 minutes. Recheck voltage.
d. If the voltage (24V) returns to
X159 pin 1, check continuity
of each pin 1 and 2 of the loose
part of X159 to ground (WP
0048 00-8).
e. If continuity to ground found at
any pin(s), follow the circuit of
the pin/wire to the component
it goes to. Unplug the
component and recheck for
continuity to ground. Replace
grounded harness (WP 0048
00-8).
0007 00-62
