TM 10-3930-675-24-1
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0017 00
Power Supply Error (RESET or USMC Only) Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 440 - Steering Wheel Sensor, Power
Supply Error (RESET or USMC Only).
Error code 440 is an information type error code. It
may not activate for the operator. The operator may
report the steering wheel has no resistance and does not
stop at the full turning radius. Enter DIAG STEERING
2(16) in the Diagnostic menu to verify the code or
enable the information type codes in the initialization
menu.
1. Inspect the steering wheel Replace damaged steering wheel
sensor and connector cable sensor or connector cable (WP
located at the bottom of the 0136 00).
steering column for damage.
2. Disconnect the connector from Replace damaged, grounded, or
the steering wheel sensor and shorted steering wheel sensor to
connector X176 located in the X176 cable (WP 0136 00).
middle panel behind the
operator's seat. Check each
wire in the cable for continuity,
continuity to ground, and for
continuity between each wire
(WP 0048 00-17).
3. Check for continuity to ground a. Replace any grounded or
or continuity between each
shorted wire(s).
wire on the mounted part of b. Repair or replace damaged
connector X176 for pins 1
connector (WP 0113 00).
through 8 (WP 0048 00-17).
There should not be continuity
to ground or continuity
between wires.
4. Check ECU (792) pins, 23, 40, a. Replace damaged ECU (792)
113, 96, 41, 38, 132, 97, and 56
terminal board (WP 0080 00).
for connection or damage (WP b. Replace ECU (792) (WP 0080
0048 00-17).
00).
0017 00-22
