TM 10-3930-675-20-1
0032 00-2
AXLE BRAKE COOLING SYSTEM TROUBLESHOOTING - CONTINUED
0032 00
Table 1. Error Code 191 - Temperature in Front Axle Above Critical Threshold
Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 191 - Temperature in Front Axle
Above Critical Threshold - Continued
b. If menu shows 95-120,
check if front wheel end
hubs are extremely warm.
If wheel ends are not extremely
warm, replace wheel temper-
ature sensor (762-1) (WP 0092
00).
2. Enter EXTRA FUNCT. 12
(13) diagnostic menu and
check
temperature
of
BRAKE COOLING. If menu
shows a value of 1:
a. Check voltage at valve
connector 6049-1. Voltage
should be 20-25V.
If voltage is not present, notify
SRA to repair or replace wire.
b. Check voltage between
connector X168 pin 3 and
pin 4, between connector
X168 pin 3 and pin 4, and
between connector X156
pin 4 and connector X160
pin 12 (20-25V).
If voltage is not present, notify
SRA to repair or replace wire.
3. Enter EXTRA FUNCT. 11
(13) diagnostic menu and
check value of HYD SPEED
FAN. If menu shows a value
of 0, press + to increase
value to 30.
a. If cooling fan is running,
replace bypass valve (WP
0174 00).
b. Notify DS Maintenance to
replace cooling fan hydraulic
pump.
4. Enter EXTRA FUNCT. 12
(13) diagnostic menu and
check value of BRAKE
COOLING.
If menu shows a value of 0,
replace ECU (790) (WP 0079
00).