Spicer CTIS (Central Tire Inflation System) Troubleshooting Guide - Manual (Page 22)

19
Diagnostics
Inaccurate Tire Pressures
May be caused by leaking control lines, clogged wheel valve
filters or valve stems, or closed Air Transport Valves.
Run Flat Definition
Pressing the RUN FLAT button once during normal system
operation puts the system in Run Flat Mode for 10 minutes
and causes several things to happen:
• The RUN FLAT light will flash along with the selected
mode light.
• A full pressure check (including atmospheric) is
requested.
• After 10 minutes Run Flat will automatically
deselect...OR... pushing RUN FLAT button again
will deselect it. It can be reselected by pressing the
button again after timeout.
• Tire pressures are checked at more frequent
intervals.
In addition, pressing the RUN FLAT button while the ECU is
displaying a “4 lights” flashing code will cause all “4 mode
lights” flashing codes (imbalance and confirmation) to be
overridden for the duration of RUN FLAT.
Note: ECU replacement—ECUs are NOT a typical cause of
problems. If an ECU is replaced, the system should be
carefully rechecked to make sure the problem has been
fixed, and does not reoccur.