UAZ PATRIOT Operation Manual page 63

In addition, rotary switch 2 has yellow illumination, which
indicates malfunctions in heating-and-ventilating unit and
climate control unit control system (this function is activated only
when the control panel is scanned with certifier via diagnostic
K-Line channel) detected by the control panel. It also indicates
"Interior preheating" mode.
"Interior preheating" operation mode is indicated with blinking
yellow illumination on rotary switch 2. The blinking period of
the illumination is 4.5 seconds:
- turned on 1.5 sec / turned off for 3 sec, when the tail lamps
are turned off;
- yellow illumination turned on 1.5 sec / green illumination
turned on 3 sec, when the tail lamps are turned on.
If the control panel has malfunctions, they are indicated
with switching on/off yellow illumination on rotary switch
2. Malfunctions are indicated only when the control panel is
scanned with certifier via diagnostic K-Line channel.
The control panel is turned on automatically when the motor
vehicle ignition is started or via signal of the pre-start liquid
heater control unit. Pre-start liquid heater control unit transmits
a signal (power) for turning-on of the control panel when the
heater is switched on and the temperature of the cooling fluid
in the heat exchanger reaches a point when a ventilator of the
heating-and-ventilating unit is turned on. When the control
panel is turned on, it automatically determines the generator
of the signal (ignition starter switch or pre-start liquid heater
control unit) and scans control elements of the climate control
unit.
If the source of power is an on-board network of the motor
vehicle (when the ignition starter switch is switched on), then the
control panel switches into the main operation mode ("Manual",
"Auto" or "Intensive windscreen heating", depending on the
condition of the corresponding switches), in which it generates
and transmits control signals to all actuating elements. These
signals correspond to control elements of the climate control
unit.
If the source of power is the pre-start liquid heater, then the
control panel switches into the "Interior preheating" operation
mode.
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