Spicer TPCS Troubleshooting Guide - Manual (Page 9)

6
Operator Instructions
Driver Display Module
Terrain and Load Pressure Selection
TPCS displays both the selected terrain and load, and may be
configured to display numerical tire pressures in PSI, if
desired. Tire pressures for the following terrain modes can be
programmed and may be selected by the operator:
• Highway (Hy) - For travel on paved surfaces at
higher speeds.
• Off Highway (OH) - For reduced speed operation on
secondary roads and unpaved surfaces.
• Emergency (E) - For selection of extremely low tire
pressures to help free a stuck vehicle.
The Emergency selection is for extreme conditions only and
should not be used for normal driving.
System Operation
• Display - The DDM uses a multi-function display to
indicate the current selections. The display will show
HY for highway pressures, OH for off-highway pres-
sures, and E for emergency pressures.
• Terrain Selection - The terrain selection is changed
by depressing the terrain rocker switch, up to
increase pressures and down to decrease pressures.
Any switch operation which does not change pres-
sures will command the system to do a pressure
check.
• Load Selection - Vehicle load selection is repre-
sented by a horizontal bar graph under the mode dis-
play. Depress the load rocker switch to change the
selection, up for increasing load and down for
decreasing load.
Operating a loaded vehicle at unloaded tire pressures may
result in tire overheating and reduced tire life or blowout.
• Pressure Display - If the terrain switch is held in the
up position for >5 seconds, numerical tire pressures
(in PSI) for each channel will alternate in the display
with the selected mode.
Note: The system is designed to allow tire pressure increase
due to heat buildup during vehicle use. This system will
not automatically deflate these pressure buildups—
lower pressure mode selection by the operator must be
selected to initiate a deflate.
• Channel Indicators - The DDM indicates FRT, RR or
TLR respectively for front, rear or trailer axle groups.
If a channel indicator is on continuously, that chan-
nel has achieved the target pressure.
CAUTION
CAUTION