TM 10-3930-675-20-1
0027 00-4
TRANSMISSION SPEED SENSORS TROUBLESHOOTING - CONTINUED
0027 00
Table 3. Error Code 651 - Engine Speed Sensor Failure, Logical Error Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 651 - Engine Speed Sensor Failure,
Logical Error
Place ignition switch in OFF
position for 30 seconds and then
back in ON position.
If error code is still present,
perform troubleshooting pro-
cedures for error code 649.
Table 4. Error Code 652 - Turbine Speed Sensor Failure, Open Circuit or Short Circuit to Battery
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 652 - Turbine Speed Sensor Failure,
Open Circuit or Short Circuit to Battery
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 X173 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 751 for
proper connection at turbine
speed sensor.
Connect loose or disconnected
connectors.
5. Check continuity between
connector 751 pin 7 and
connector X173 pin 6 and
between connector 751 pin 8
and connector X173 pin 7.
a. If continuity is not present,
repair or replace connectors
(WP 0111 00).
b. If wiring harness must be
replaced, notify SRA.
6. Disconnect
transmission
temperature sensor connector
from transmission ECU.
