Climatronic Automatic A/C System

Climatronic Automatic A/C System

New Jetta from MY 2005 may be equipped with a dual-zone (right / left - front) Climatronic system.

Climatronic is a fully automatic, digital-electronic 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 integrated A/C control head 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 for the driver and front passenger. 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 integrated with -J255- contains all controls and relevant displays needed to operate the Climatronic system. The system's input temperatures are displayed in LCD displays.

All automatic or manual function selections are input into the A/C control head via buttons located between and below the LCD displays.

When "AUTO" mode is selected, fresh air blower speed and air distribution signals are automatically monitored and adjusted. The fresh air blower speed is high when there is a large difference between the selected temperature and the actual interior temperature, and low when the difference is small or the same.

The interior temperature settings speed are indicated on the A/C control head display at all times. The system can be switched on and off by pressing the "OFF" button.

Manually selected settings remain stored in memory after switching the ignition off and will be recalled on subsequent re-start. Only the function " Air recirculation" is erased after 20 minutes.

• Pressing AUTO button overrides all manual settings.

• Climatronic, manual operation --> Owner's Manual

• In "ECON" operation, A/C compressor output is regulated to almost zero delivery. Heating and A/C operation continues to be controlled electronically.

Before troubleshooting or servicing, technicians must be familiar with the functions and operation specifics of the standard or optional A/C system. Always read the owners manual and review applicable system functions.