TM 10-3930-675-20-1
0015 00-4
ELECTRONIC CONTROL UNIT (ECU) SUPPLY VOLTAGE TROUBLESHOOTING - CONTINUED
0015 00
Table 5. Error Code 813 - Voltage Failure at Transmission Gearshift Valve Supply Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 813 - Voltage Failure at Transmission
Gearshift Valve Supply
1. Remove cab transmission and
steering ECU panel cover and
check transmission ECU
connector
for
proper
connection (WP 0079 00).
Connect loose or disconnected
connector.
2. Remove cab rear wall center
panel cover and check
connection block X172 for
proper connections.
Connect loose or disconnected
connectors.
3. Move
cab
to
transport
position
and
remove
transmission access covers
(WP 0135 00).
4. Check transmission electrical
harness connector 827 for
proper connection.
Connect loose or disconnected
connectors.
5. Disconnect
transmission
connector 827, connector
X172,
and
ECU
(793)
connector.
6. Check continuity between
connector 827 pin 7 and
connector X172 pin 7,
between connector 793 pin 12
and connector X172 pin 7,
and between connector 793
pin 13 and connector X172
pin 7. Also check for
continuity to chassis.
a. If continuity is present, notify
SRA.
b. If continuity is not present,
repair or replace connectors
(WP 0111 00).
c. If wiring harness must be
replaced, notify SRA.
7. Check voltage at connector
X47 pins 1 and 2.
If voltage is present, notify SRA
to replace wire 473.
