Climatronic

General information

Depending on engine and equipment level, Touareg from m.y 2004 are equipped with either a Dual-zone (right/left - front) or Four-zone (right/left - front/rear) 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 on vehicles with Dual-zone Climatronic, and also the rear seat passengers on vehicles with Four-zone Climatronic. 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 functional status (mode selection, temperature and air distribution) is displayed in LCD readouts.

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

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 setting, operation modes, approximate outside temperature and blower speed are indicated on the A/C control head display at all times. The defrost, vent and footwell air distribution symbols only appear in the display when air distribution is selected manually (AUTO function override). During manual air distribution, the "AUTO" display remains off until such time the "AUTO" button is pressed.

The system can be switched off completely by pressing the front passenger "decrease fan speed" button until "OFF" appears in the display.

Climate control options
- Automatic temperature and fan speed mode
- Manual temperature and fan speed mode
- Manual selection of air recirculation mode
- Manual selection of air flow to instrument panel vents
- Manual selection of air flow to footwell vents
- Manual selection of airflow to windshield defroster

NOTE:
- Pressing the button "AUTO" overrides any manually input settings.
- In ECON operation, only the compressor is switched off. Heating and A/C operation continues to be controlled electronically.
- 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.
- Climatronic, manual operation, See owner's Manual.
- A malfunction is present, check the Diagnostic Trouble Code (DTC) memory using the VAS 5051/5052 Vehicle Diagnostic Testing and Information System in operating mode "Guided Fault Finding".