Auxiliary Heater Heating Element -Z35-, Removing And Installing: Notes

WARNING: This page is about a different variant/trim than selected.

NOTE:

Currently, Vehicles With A Diesel Engine And Certain Gasoline Engines (For Example, Vehicles That Can Use Bioethanol "Flex Fuel Vehicle" From My 2010 And On High Voltage Vehicles) Have An Electric Auxiliary Heater. Refer To The Audi Sales Program. The Air Is Supplied With Heat Energy After Leaving The A/C Heater Core If There Is A Request From The Climatronic Control Module -J255- A/C Display And Control Head.

For vehicles with a diesel engine, the electrical auxiliary heater (the Auxiliary Heater Heating Element -Z35-) is activated via the respective engine control module (for this, the control modules exchange information via the Data Bus system) using the Vehicle Diagnostic Tester in the "Guided Fault Finding " function. Refer to the appropriate Wiring Diagram.

For vehicles with a gasoline engine, the electric auxiliary heater (the Auxiliary Heater Heating Element -Z35-) is activated by the Climatronic Control Module -J255- display and control head via the local Data Bus (activated via the same outlet and also via the Fresh Air Blower Control Module -J126-) on the Auxiliary Air Heater Control Module -J604-. The Auxiliary Air Heater Control Module -J604- then activates the Low Heat Output Relay -J359- and the High Heat Output Relay -J360- and these send the current to the Auxiliary Heater Heating Element -Z35- using the Vehicle Diagnostic Tester in the "Guided Fault Finding " function. Refer to the appropriate Wiring Diagram.

Check the Auxiliary Heater Heating Element -Z35- function. Refer to AUXILIARY HEATER HEATING ELEMENT -Z35-, CHECKING .

Vehicles without an Auxiliary Heater Heating Element -Z35- have a honeycomb inside the A/C unit as a place holder. Refer to AIR INTAKE AND OUTLET OPENINGS (air intake, air vent and air guide in the A/C unit).

In MY 2009, as a running change, a new version of the Auxiliary Heater Heating Element -Z35- is being installed (the heating elements are a bit more narrow); be sure to use the correct version.