TM 10-3930-675-24-1
MISCELLANEOUS TRANSMISSION FAILURE TROUBLESHOOTING - CONTINUED
0029 00
Table 4. Error Code 746 - Backup Alarm Control Circuit,
Short Circuit to Battery Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 746 - Backup Alarm Control Circuit, 1. Ensure circuit breaker F10 is Reset circuit breaker.
Short Circuit to Battery Failure.
not tripped.
2. Check
for
error
code a. If error code 746 is no longer
displayed. Access the middle
active, access relay 305 in the
panel behind operator's seat
cab distribution box. Remove
and disconnect X177. Turn the
the 305 relay and test the
ignition on and check for error
resistance between pins 85 and
code 746 (there may be several
86. Resistance should be 290
error codes that display when
to 350 Ohms.
connector
X177
is b. Replace relay if resistance is
disconnected).
not as specified (WP 0074 00).
c. If error code 746 is still active,
replace ECU (793) (WP 0080
00).
Table 5. Error Code 747 - Backup Alarm Control Circuit,
Open Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 747 - Backup Alarm Control Circuit, 1. Ensure circuit breaker F10 is Reset circuit breaker.
Open Circuit Failure.
not tripped.
2. Check for resistance. Access Replace relay if resistance is not
relay 305 in the cab as specified (WP 0074 00).
distribution box. Remove the
305 relay and check resistance
between pins 85 and 86.
Resistance should be 290 to
350 Ohms.
3. Check for voltage. With the a. If no voltage (24V) is found,
305 relay still removed, check
check circuit breaker F10 and
voltage (24V) at relay socket
continuity of wires A57 and
pin 86 with the ignition on.
A57A (WP 0048 00-45).
b. Replace damaged or non-
operational circuit breaker
(WP 0074 00).
c. Repair or replace damaged
connector (WP 0113 00).
d. Replace damaged or open
wire.
0029 00-5
