Figure 2-5. CTIS Controller Controls and Indicators - CONT.
Control or Indicator
Lights (amber) when truck average speed for
one minute exceeds the speed limit for
rotary selector switch (CTIS) setting.
Low Air Indicator
Lights solid (red) to warn of low pressure in
truck air system. This condition causes CTIS
to shut down giving truck brake system prior-
ity to the available air pressure. CTIS will
automatically resume operation when air
pressure builds up to about 110 psi (758 kPa).
Light will flash if CTIS has detected a leak in
the tires, hoses, fittings, air connections,
wheel seals, or is malfunctioning.
Press (and hold for one second) this push
button switch to start operation of CTIS.
Turn switch to ON position for normal
CTIS operation. Driveline lockup function
will still operate with switch in OFF position.