Spicer TPCS (Tire Pressure Control System) Driver Instructions User Manual
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Speed Sensor
The speed sensor (or optional digital or data link speed input) provides the ECU with vehicle
speed information. If the vehicle speed is above programmed limits, the system will display an
overspeed indication on the Operator Control Panel. Continued operation in this condition will
cause the system to automatically inflate the tires to a more appropriate pressure.
Pressure Switch
The Pressure Switch (PS) acts as an electronic brake priority switch. It prevents the TPCS from
consuming air from the supply tank until the brake system is fully charged. This increase brake
system air reserves above those typical of brake systems equipped with priority valves. The PS
also ensures that enough pressure exists for the system to operate properly.
Air Lines
The TPCS uses a dedicated pneumatic system plumbed from the vehicle’s existing supply tank.
Wiring
A wiring harness (Dana or OEM supplied) provides for electrical signals between appropriate
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