TM 10-3930-675-24-1
ELECTRONIC CONTROL UNIT (ECU) SUPPLY VOLTAGE TROUBLESHOOTING
THIS WORK PACKAGE COVERS
Error Code 811 - Voltage Supply Too Low for Transmis-
Error Code 451 - Voltage Supply Too High for Steering
sion ECU (793)
ECU (792)
Error Code 812 - Voltage Supply Too High for Trans-
Error Code 452 - Voltage Supply Too Low for Steering
mission ECU (793)
ECU (792)
Error Code 813 - Voltage Failure at Transmission Gear-
Error Code 453 - Wheel Sensor Supply Voltage Out of
shift Valve Supply
Range (RESET or USMC only)
Error Code 814 - Voltage Failure at Transmission Gear-
Error Code 454 - Wheel Sensor Supply Voltage Out of
shift Valve Supply
Range (RESET or USMC only)
INITIAL SETUP
References
References - Continued
ECS Steering (A34651.0200) (WP 0048 00-16)
TM 10-3930-675-10
ECU Transmission (A34650.0200) (WP 0048 00-
12)
Current Supply (A34738.0200) (WP 0048 00-31)
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Table 1. Error Code 451 - Voltage Supply Too High for Steering ECU (792) Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 451 - Voltage Supply Too High for Check output voltage from
If output voltage is greater than
33V, replace alternator (WP 0070
Steering ECU (792).
00).
