TM 10-3930-675-20-1
0026 00-2
TRANSMISSION TEMPERATURE TROUBLESHOOTING - CONTINUED
0026 00
Table 1. Error Code 637 - Transmission Sump Temperature Sensor Failure, Open Circuit or
Short Circuit to Battery Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 637 - Transmission Sump
Temperature Sensor Failure, Open Circuit or
Short Circuit to Battery - Continued
4. Check transmission electrical
harness
connector
827
located on top of transmission
for proper connection.
Connect loose or disconnected
connectors.
5. Check continuity between
connector 827 pin 8 and
connector X172 pin 8 and
between connector 827 pin 9
and connector X172 pin 9.
a. If continuity is not present,
repair or replace connectors
(WP 0111 00).
b. If wiring harness must be
replaced, notify SRA.
c. If continuity is present, notify
SRA.
6. Disconnect
transmission
ECU connector.
7. Check continuity between
transmission ECU connector
pin 39 and connector X172
pin
8
and
between
transmission ECU connector
pin 46 and connector X172
pin 9.
a. If continuity is not present,
repair or replace connectors
(WP 0111 00).
b. If wiring harness must be
replaced, notify SRA.
c. If continuity is present, notify
SRA.
Table 2. Error Code 638 - Transmission Sump Temperature Sensor Failure, Short Circuit to Chassis
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 638 - Transmission Sump
Temperature Sensor Failure, Short Circuit to
Chassis
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 operator’s cab to
transport position and remove
transmission access covers
(WP 0135 00).
