Spicer TPCS Troubleshooting Guide - Manual (Page 4)

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General Information
Tire Pressure Control System
Spicer Tire Pressure Control System features driver control of
tire air pressure through:
• Simple push button operation.
• Independent Front, Rear, and Trailer operation.
• Electronic braking priority for air system.
• Vehicle speed sensing and response capability.
• Self-diagnostics.
Key Features
Depressurized Control Lines
The only time the system is pressurized is when changing tire
pressures or during pressure checks. Wheel valves isolate the
tires from the rest of the system.
Electronic Braking Priority
A pressure switch, installed in the supply tank, controls the
TPCS’s use of air. This optimizes and protects the brake sys-
tem’s primary tank pressures during system operation.
Self-Diagnostic and Auto Shut-Down
The Spicer TPCS provides self-diagnosis during operation. If
the system detects a problem, it will display a service code on
the driver interface to alert the driver. If necessary, it will close
the wheel valves and shut down.
Diagnostic Capability
The Spicer TPCS provides for easy troubleshooting using PC-
based or industry standard tools. PC-supported diagnostics
improve troubleshooting, reduce maintenance time, provide
manual control of TPCS test sequences, and give historical
and active service code data.
Speed / Pressure Control and Warning
If truck speed exceeds the maximum allowable speed for a
given setting, a warning is activated by TPCS to alert the
driver. If speed is not reduced, the system automatically
inflates the tires to the appropriate pressure.
Manual Tire Inflation / Deflation
A valve stem has been included on each wheel valve and may
be used for manual inflation, deflation or measurement of tire
pressures.
Run Flat Operation
The TPCS normally checks tire pressures at intervals of 15
minutes. If possible tire damage is detected, the system will
activate Auto RUN FLAT. RUN FLAT reduces the pressure
check interval to 15 seconds, helping to assure that the tire
will remain inflated despite minor tire damage.