TM 10-3930-675-20-1
0029 00-4
MISCELLANEOUS TRANSMISSION FAILURE TROUBLESHOOTING - CONTINUED
0029 00
Table 4. 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,
Open Circuit Failure
1. Place gear selector in N
(Neutral) position (TM 10-
3930-675-10).
2. Remove cab circuit breaker
panel cover and ensure that
circuit breaker F10 is not
tripped.
Reset circuit breaker as required
(WP 0073 00).
3. Open cab distribution box to
access relay circuit board.
4. Check voltage at connector
XK5 pin 7.
If voltage is not present, notify
SRA to repair or replace wire
A57.
5. Check voltage at connector
XK5 pin 2.
If voltage is not present, replace
transmission ECU (WP 0079
00).
6. Check voltage at relay 305 pin
86.
If voltage is not present, replace
transmission ECU (WP 0079
00).
7. Remove cab transmission and
steering ECU panel cover and
disconnect transmission ECU
(793) connector (WP 0079
00).
8. Check continuity between
ECU (793) connector pin 7
and connector X177 pin 10.
If continuity is not present,
repair or replace connectors (WP
0111 00).
9. Check continuity between
connector X177 pin 10 and
connector X160 pin 10.
If continuity is not present,
repair or replace connectors (WP
0111 00).
10.Check continuity between
connector X160 pin 10 and
connector X150 pin 7.
If continuity is not present,
repair or replace connectors (WP
0111 00).
