Volkswagen Golf 1999 Service Manual page 3788

Climatronic
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Climatronic
General information
Climatronic is a fully automatic climate
control system. The temperature of the
interior air supply, fresh air blower speeds
and passenger compartment air distribution
are regulated automatically. The system
features fully digital electronic circuitry and
On Board Diagnostic (OBD) capability.
In addition to fully automatic function, air
distribution settings and fresh air blower
speeds can be selected manually to suit
individual needs.
The Climatronic control module -J255- is the
heart of the system. It receives input
information from the A/C control head -E87-
and various electronic components (sensors
and switches). This information is processed
by the control module in accordance with
specified values and provides corresponding
output signals that control electrical
components (actuators).
The system controls interior air temperature
and distribution. The system continually
samples and compares the selected interior
air temperature with the actual air
temperature measured by the system.
Blower speeds, air temperature and
distribution are then adjusted and regulated
accordingly.
The A/C control head -E87- contains all
controls and relevant displays needed to
operate the Climatronic system. The
system's functional status (mode selection,
temperature and air distribution) is displayed
in a LCD readout
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