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

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

Install In Reverse Order Of Removal. Note The Following:

-- The Installed Auxiliary Heater Heating Element -Z35- (The Honeycomb) Is, Depending The A/C System Version, Supplied With Foam Seals -A And B-.

Fig 1: Identifying Installed Auxiliary Air Heater Heating Element

Courtesy of AUDI OF AMERICA, LLC

1 - Honeycomb for a vehicle equipped with a "Basis" A/C system.

2 - Honeycomb for a vehicle equipped with a "Convenience" A/C system.

3 - Auxiliary Heater Heating Element -Z35- for a vehicle equipped with a "Basis" A/C system.

4 - Auxiliary Heater Heating Element -Z35- for a vehicle equipped with a "Convenience" A/C system.

NOTE:

On Vehicles With The "Convenience" A/C System, There Are Different Temperature Settings For The Left And Right Sides As Well As For The Rear. The Seal -B- Separates The Air Guides For The Left And Right Sides In The A/C Unit. Refer to AIR INTAKE AND OUTLET OPENINGS .

The Seal -B- Must Be Applied In The Center Of The Honeycomb Of The Auxiliary Heater Heating Element -Z35-.

Seal May Curl Up On Insertion If Not Correctly Bonded On.

If The Seal Is Damaged Or Installed Incorrectly, Cold Air Can Flow Past The Auxiliary Air Heater Heating Element -Z35- (Past The Honeycomb); On Vehicles Equipped With The "Convenience" A/C System, It Is Possible That There Is No Clear Separation Between The Left And Right Side.

-- With The Auxiliary Heater Heating Element -Z35- (Honeycomb) Removed, Check The A/C Unit, The Heater Core And The Evaporator -B- For Dirt; If Necessary Clean.

Fig 2: Identifying Auxiliary Air Heater Heating Element

Courtesy of AUDI OF AMERICA, LLC

-- Slide The Auxiliary Heater Heating Element -Z35- (Honeycomb) -A- Into The A/C Unit.

NOTE:

On The "Convenience" A/C System, Be Careful When Installing The Groove / Spring Connection -C And D-

-- Install The Removed Parts In The Opposite Order.

-- Perform A Basic Setting And The Output Diagnostic Test Mode For The A/C System Using The Vehicle Diagnostic Tester In The "Guided Fault Finding " Function.

NOTE:

On This Vehicle, The Actuators Are Equipped With Electronics. During The Basic Setting, A New Actuator Learns Its Position On The A/C Unit And Can Then Be Activated By The Climatronic Control Module -J255- A/C Display And Control Head (Currently All Actuators Are Identical) Using The Vehicle Diagnostic Tester In The "Guided Fault Finding " Function.

During the basic setting, the actuators are assigned and adapted corresponding to the switching sequence of the wiring. If this sequence does not conform with the specification, the actuators will adapt incorrectly and the door control will be wrong. Refer to MAIN WIRING DIAGRAM FOR A/C SYSTEM ACTUATORS .

-- Turn On The Ignition.

-- Check The DTC Memory For The Climatronic Control Module -J255- A/C Display And Control Head And Erase Any Displayed Malfunctions, If Necessary Using The Vehicle Diagnostic Tester In The "Guided Fault Finding " Function.

-- After Installing, Check The Auxiliary Heater Heating Element -Z35- Activation And Function, If Necessary. Refer To AUXILIARY HEATER HEATING ELEMENT -Z35-, CHECKING .