AUDI A4 1999 B5 / 1.G Heating And Ventilation System Servicing Workshop Manual

87-151


Heating and ventilation system,
servicing Instrument panel air outlets and air guide
ducts

CAUTION!
Before working on the electrical system:
Note:
Air is extracted from the passenger compartment
through 2 outlets located on both sides of the rear
luggage compartment area near the bumper
page 87-157
.
Removing and installing Repair Manual, Body
Interior, Repair Group 70

Obtain security code for anti-theft radio.
Note customer's pre-set radio stations.
Disconnect battery Ground (GND) strap.1 -
Instrument panel top cover 2 -
Retaining spring for air guide duct
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87-152


3 -
Retaining spring for air guide duct
4 -
Air guide duct
5 -
Defroster duct
6 -
Right instrument panel air outlet
Removing and installing page 87
-155
7 -
Side window defroster vent
Removing and installing Repair Manual, Body Interior, Repair Group 70

8 -
Center instrument panel air outlet
Removing and installing page 87
-154
9 -
Windshield defroster vent
Removing and installing page 87
-156
10 -
Left instrument panel air outlet
Removing and installing page 87
-155
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87-153

Tool for removing instrument panel air
outlets, locally made


- Bend 3 mm (1/8 in.) diameter wire as shown.
Dimension X = 6 mm (1/4 in.)
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87-154

Instrument panel air outlet (center),
removing and installing


Note:
Should a swivel insert become detached from the air outlet when
removing, re-install swivel insert so that it locks in place on both sides. - Insert tools -A- into the instrument panel air outlet and pull outlet evenly
out of the instrument panel.
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87-155

Instrument panel air outlets (left and
right), removing and installing


Note:
Should a swivel insert become detached from the air outlet when
removing, re-install swivel insert so that it locks in place on both sides. - Insert tools -A- into the instrument panel air outlet and pull air outlet
evenly out of the instrument panel.
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87-156

Instrument panel windshield defroster
vent, removing and installing

Remove instrument panel top cover
Repair Manual, Body Interior, Repair Group
70


- Remove nuts -A- and remove vent from instrument panel top cover.
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87-157

Air extraction vents, checking


Notes: - Sealing lips -B- in air extraction vents -A- must move freely and close
by themselves.
Illustration shows air extraction vent with rear bumper removed.2 air extraction vents (left and right) are installed for forced ventilation.Extraction of air from the passenger compartment can only function
properly if rear shelf air guides are not blocked.
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87-158

Dust and pollen filter, removing and
installing

Remove right air plenum cover
Repair Manual, Body Exterior, Repair Group
66


Notes: - Remove water guide -A-.
- Remove dust and pollen filter -B- from housing.
The water guide and the plenum cover must be properly installed to
ensure no water flows onto the dust and pollen filter and into the
heater housing. Gasket -C- must be attached to the housing of the dust and pollen
filter; before installing the housing, check that it is correctly located
and not damaged. The dust and pollen filter should be replaced at regular intervals
Repair Manual, Maintenance.

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87-159

Heater/air conditioner assembly
complete with instrument panel,
removing and installing (1996)


- Using VAG1551 function 03, initiate output
Diagnostic Test Mode (DTM) page 01
-42
.

CAUTION!
Before proceeding with removal of instrument panel and heater/air
conditioner complete: - Proceed through output DTM and wait until air flow flap -A- closes via
air flow flap motor V71.
- Cancel output DTM (press VAG1551 button -C-) with closed air flow
flap -A-.
- Discharge refrigerant system page 87
-201
.
- Remove dust and pollen filter page 87
-158
.
Obtain security code for anti-theft radio.Note customer's pre-set radio stations.Move power seats to most rearward position.Disconnect and remove battery.
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87-160

- Release pressure in coolant system by opening
cap at coolant expansion tank.

WARNING!

With hot engine, cooling system is under
pressure.
Coolant expansion tank cap must be
removed slowly.

CAUTION! - Clamp coolant hoses -A- and -B- with VAG3094 (or equivalent) and
remove from heater core inlet/outlet.
- Place catch basin below heater core connection -A- and carefully blow
coolant out of heater core with compressed air through connection -B-.
- Remove A/C system vacuum supply hose from engine and attach at
heater core inlet/outlet.
- Remove boot -C-.
Dispose of used coolant properly. Check local regulations.Do not re-use used coolant.
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