TM 9-2320-363-10
2-6.
CTIS CONTROLS AND INDICATORS (M917A1 AND
M917A1 W/MCS) (Con’t).
Key
Control or Indicator
Function
3
EMER
(Emergency)
Press key to select 30 psi (207 kPa) tire pressures
Mode Key
for operation in extreme terrain conditions where
maximum traction is required, up to a maximum
speed of 10 mph (16 kph). Reduce MPH indicator
light will always illuminate in this mode. Operation
in EMER mode is limited to 10 minutes. After ten
minutes, CTIS will inflate to SAND setting unless
driver re-selects EMER.
4
SAND Mode Key
Press key to select 40 psi (276 kPa) tire pressures
for operation in sand, snow, and mud up to a
maximum speed of 25 mph (40 kph). If 25 mph
overspeed is exceeded for more than one minute,
reduce MPH indicator light will flash. If exceeded
for more than two minutes, CTIS will automatically
inflate to cross-country (X-C) setting. There is no
time limit for operation in this mode.
5
X-C (Cross-Country)
Press key to select 55 psi (379 kPa) tire pressures
Mode Key
for operation on non-paved secondary roads and
unimproved surfaces up to a maximum speed of 40
mph (64 kph). If 40 mph overspeed is exceeded for
more than one minute, reduce MPH indicator light
will flash. If exceeded for more than two minutes,
CTIS will automatically inflate to highway setting.
There is no time limit for operation in this mode.
6
HWY (Highway)
Press key to select 90 psi (621 kPa) tire pressures
Mode Key
for normal operation on improved paved surfaces
up to a maximum speed of 60 mph (97 kph). There
is no time limit for operation in this mode.
7
Electronic Control
The control center for CTIS
Unit (ECU)
2-27
