TM 10-3930-675-20-1
0028 00-12
TRANSMISSION CLUTCH CIRCUIT TROUBLESHOOTING - CONTINUED
0028 00
Table 8. Error Code 720 - Clutch K3 Short Circuit to Chassis Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 720 - Clutch K3 Short Circuit to
Chassis Failure
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
connector 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,
located
on
top
of
transmission,
for
proper
connection.
Connect loose or disconnected
connectors.
5. Disconnect connector 827,
connector X172, and trans-
mission ECU (793) connector
and check for continuity to
chassis at all pins from
connector 827 pin 1 thru pin 4
and at all pins from connector
X172 pin 1 thru pin 7.
a. If continuity is present, repair
or replace connectors (WP
0111 00).
b. If wiring harness must be
replaced, notify SRA.
c. If continuity is not present,
notify SRA.
Table 9. Error Code 721- Clutch K3 Open Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 721 - Clutch K3 Open Circuit Failure
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
connector X172 for proper
connections.
Connect loose or disconnected
connectors.
