TM 10-3930-675-24-1
AXLE BRAKE COOLING SYSTEM TROUBLESHOOTING
THIS WORK PACKAGE COVERS
Error Code 191 - Temperature in Front Axle Above
Error Code 414 - Brake Cooling Bypass Valve Short
Critical Threshold
Circuit Failure
Error Code 192 - Temperature in Rear Axle Above Crit-
ical Threshold
INITIAL SETUP
References - Continued
References
TM 10-3930-675-10
ECS Electrical Servo (A34648.0200) (WP 0048 00-
ECS Steering (A34651.0200) (WP 0048 00-16)
5)
WARNING
Use caution when checking wheel and hub for extreme heat. Failure to do so may cause serious burns.
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Table 1. Error Code 191 - Temperature in Front Axle
Above Critical Threshold Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 191 - Temperature in Front Axle 1. Enter
diagnostic
menu a. The normal temperature
Above Critical Threshold.
"EXTRA FUNCT" 12(13).
should be under 95F (35C).
Check the temperature of b. If the temperature reads
WHEEL END FRONT.
between 95 to 120F (35 to
49C), check the wheel hubs
for temperature above 203F
(95C).
c. A reading of 155 indicates a
possible short across the
temperature sensor or circuit.
