TM 10-3930-675-24-1
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 4. Check connector and pins.
a. Repair or replace damaged
Sensor Failure, Open Circuit or Short Circuit to
Disconnect ECU (793). Check
connector (WP 0113 00).
Battery - Continued.
the connector and ECU pins 46
b. Replace damaged ECU
and 49 for damage. Check
(793) (WP 0080 00).
continuity of wires A1729A,
c. Replace open or shorted
A1729B, and A17212 (WP
wire.
0048 00-15).
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 1. Check connector and pins.
If resistance is not as specified, or
Sensor Failure, Short Circuit to Chassis.
Disconnect connector X172
continuity to ground is present,
located in the middle panel
move the cab to the transport
behind the operator's seat.
position (TM 10-3930-675-10)
Check resistance at the loose
and remove the transmission
part of connector X172
front access cover (WP 0142 00).
between pins 12 and 13 and
check pin for continuity to
ground (WP 0048 00-15).
Resistance should be 10k to
200k Ohms and there should
be no continuity to ground.
2. Check connector and pins.
If resistance is not as specified,
Disconnect and inspect the 766
continuity to ground is present, or
temperature sensor located on
the 766 temperature sensor is
the transmission bell housing.
damaged, replace the 766
Check resistance of the 766
temperature sensor (WP 0096
temperature sensor between
00).
the two pins and check pin for
continuity to ground (WP 0048
00-15). Resistance should be
10k to 200k Ohms and there
should be no continuity to
ground.
3. Inspect the 766 connector and
If continuity is not present in
pins for damage and proper
either wire, continuity to ground
connection. Check continuity
is present or connector 766 is
and for continuity to ground of
damaged, notify Sustainment
wires 17212 and 17213 (WP
Maintenance to replace engine
0048 00-15).
and transmission wiring harness.
0026 00-4
