TM 10-3930-675-20-1
0026 00-4
TRANSMISSION TEMPERATURE TROUBLESHOOTING - CONTINUED
0026 00
Table 3. Error Code 639 - Converter Output Temperature Sensor Failure, Open Circuit or Short Circuit
to Battery Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error
Code
639
-
Converter
Output
Temperature Sensor Failure, Open Circuit or
Short Circuit to Battery - Continued
6. Disconnect
transmission
temperature sensor connector
from transmission ECU.
7. Check continuity between
transmission ECU connector
pin 49 and connector X172
pin
12
and
between
transmission ECU connector
pin 46 and connector X172
pin 3.
a. If continuity is not present,
repair or replace connectors
(WP 0111 00).
b. If wiring harness must be
replaced, notify SRA.
8. Disconnect
transmission
sensor
connector
from
transmission sensor.
9. Perform internal resistance
check of temperature sensor.
Resistance should be 800-
1500 ohms.
If resistance is not as specified,
replace temperature sensor (WP
0095 00).
Table 4. Error Code 640 - Converter Output Temperature Sensor Failure, Short Circuit to Chassis
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error
Code
640
-
Converter
Output
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).
4. Check transmission electrical
harness
connector
766
located on top right side of
transmission
for
proper
connection.
Connect loose or disconnected
connectors.
