Spicer TPCS (Tire Pressure Control System) Driver Instructions - Manual (Page 7)

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Digital Display
The display shows either tire pressure or service codes for the channel as indicated by the illumi-
nated inner tire rings (See Channel Indicators). When the system is actively changing tire pres-
sure, the indicator arrow above the target mode will flash.
Service Code Indication - The exclamation point indicates that the value shown in the digital dis-
play is not a pressure, but rather a service code. See Service Codes Section.
Metric/English Indicator - The unit of measure indicator tells if the tire pressure is shown in met-
ric (bar) or English (psi) units.
Mode Keys and Annunciator Arrows
These keys select pressures appropriate for different surface and loading conditions. The annun-
ciator arrow points to the selected key and signals one of two states.
• If the arrow is flashing, the system is in the process of checking or changing pressure.
• If the arrow is lighted steady, the selected pressure has been achieved and the system is
de-pressurized.
L/U Key (Loaded/Unloaded) - This key selects pressures appropriate for either a loaded or
unloaded vehicle.
HWY - For high speed travel on paved surfaces.
OFF HWY - For operation on secondary roads.
EMER - For selection of extremely low tire pressures to help free a stuck vehicle.
The EMER feature is for extreme conditions only and should not be used for normal driving.
CAUTION