TM 10-3930-675-20-1
0043 00-3
TOPHANDLER TILT TROUBLESHOOTING - CONTINUED
0043 00
Table 1. Error Code 129 - Joystick-to-ECU (790) Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 129 - Joystick-to-ECU (790) Failure
- Continued
i. Check
resistance
of
joystick
potentiometer:
joystick pin 9 to joystick pin
10 should be 1.1-1.4k
ohms; joystick pin 9 to
joystick pin 1 should be 1.6-
1.9k ohms; joystick pin 1 to
joystick pin 10 should be
1.6-1.9k ohms.
If resistance is not as specified,
replace joystick (WP 0081 00).
2. Enter “DIAG SERVO 6 (13)”
menu and check voltage of
TILT IN/OUT. If voltage
reads
5V,
perform
the
following steps:
a. Slowly activate tilt function
in and out on joystick.
Observe voltage on menu.
Voltage should be 1-9V.
If voltage suddenly goes out of
range when joystick is moved,
replace joystick (WP 0081 00).
b. Remove ECU (790) cover
from operator’s seat base
and slide ECU mounting
tray out (WP 0079 00).
c. Remove joystick cover.
d. Check
ECU
(790)
connector 1, tray grounding
leads, and joystick con-
nector X155 for proper
connections.
a. Connect
any
loose
or
disconnected
connections.
Push ECU mounting tray in
and install cover.
b. Repair
or
replace
any
damaged connectors (WP
0111 00). Push ECU mounting
tray in and install cover.
