Spicer TPCS Troubleshooting Guide - Manual (Page 47)

44
Service Codes
Group: 9P! (Codes 36, 37,
38
)
Inflate Trend (Codes 36, 37, 38)
Using the diagnostic tool, check
faults to identify the faulty channel:
Front (36)
Rear (37)
Trailer (38)
Replace PCU and retest.
Note: While replacing the PCU, pay
particular attention to possible air
line contamination (e.g., oil, water,
particles) which may suggest further
air system maintenance needs.
Yes
Is there a
damaged tire on
the identified
channel?
Repair tire and retest system.
Initiate inflate mode on the faulty channel.
Is there a leaking
hose between a tire
and wheel valve?
Replace the hose and
retest the system.
Is a wheel valve
leaking through the
valve exhaust?
Replace the wheel valve
and retest the system.
Are there any
leaks in the
channel’s control
lines or seals?
Is air leaking
out the PCU vent
port?
Repair leak and retest.
Service code is not active. Reverify
flowchart steps and wait for fault to reoccur.
No
No
No
No
Yes
Yes
Yes
Yes
No