Spicer TPCS Troubleshooting Guide - Manual (Page 51)

48
Service Codes
Group: 11P! (Codes 44,
45
, 46
)
Tire Leak (Imbalance) (Codes 44, 45, 46)
Using the diagnostic tool, identify the faulty channel:
Front (44)
Rear (45)
Trailer (46)
Are any wheel
readings low?
Check the following:
Tire Damage
Wheel valve filter
Air line leaks
Wheel seal air leaks
Wheel valve leaks
Repair faulty components and recheck the system.
Refer to Service Manual
Are any wheel
readings high?
Check for a blocked wheel valve
exhaust or plugged wheel valve filter.
Make repairs to faulty components and
recheck the system.
Refer to Service Manual
Is there
an audible leak?
(Also check axle
vents.)
Make repairs to faulty
components and recheck system.
Refer to Service Manual
Is leak found?
Check the system for
kinked lines. Repair
faulty components and
recheck the system.
Refer to Service
Manual
No
No
Yes
Yes
Yes
No
Yes
Make repairs to faulty components and recheck system.
Refer to Service Manual
Use diagnostic tool to verify proper vehicle configuration selection.
Manually check the tire pressures at
the wheel valves on the faulty channel.
Place the channel into the inflate mode and check for audible leaks.
Place the channel into the hold mode and
check for leaks using a soap solution if
necessary to locate the source of the leak.
Place channel in
normal mode.
Does wheel
valve close?
Replace the wheel valve
and recheck system.
Refer to Service Manual
No
No
Yes