TM 10-3930-675-20-1
0027 00-1
TRANSMISSION SPEED SENSORS TROUBLESHOOTING
0027 00
THIS WORK PACKAGE COVERS
Error Code 649 - Engine Speed Sensor Failure, Open
Circuit or Short Circuit to Battery
Error Code 650 - Engine Speed Sensor Failure, Short
Circuit to Chassis
Error Code 651 - Engine Speed Sensor Failure, Logical
Error
Error Code 652 - Turbine Speed Sensor Failure, Open
Circuit or Short Circuit to Battery
Error Code 653 - Turbine Speed Sensor Failure, Short
Circuit to Chassis
Error Code 654 - Turbine Speed Sensor Failure, Logical
Error
Error Code 655 - Internal Speed Sensor Failure, Open
Circuit or Short Circuit to Battery
Error Code 656 - Internal Speed Sensor Failure, Short
Circuit to Chassis
Error Code 657 - Internal Speed Sensor Failure, Logical
Error
Error Code 658 - Output Speed Sensor Failure, Open
Circuit or Short Circuit to Battery
Error Code 659 - Output Speed Sensor Failure, Short
Circuit to Chassis
Error Code 660 - Output Speed Sensor Failure, Logical
Error
Error Code 662 - Output Speed Sensor Failure, Logical
Speed Error
INITIAL SETUP
References
TM 10-3930-675-10
ECU Transmission (A34650.0200) (WP 0199 00-12)
NOTE
•
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations
that locate critical components.
•
Refer also to illustration at end of work package for component location.
Table 1. Error Code 649 - Engine Speed Sensor Failure, Open Circuit or Short Circuit
to Battery Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 649 - Engine 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
connection block X173 for
proper connections.
Connect loose or disconnected
connectors.
