Spicer TPCS Troubleshooting Guide User Manual

Page 47

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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.

Yes