Audi A3 1997 Manual page 181

Notes:
◆ Prior to removal, interrogate -E87 fault memory.
◆ After replacing -E87, always:
- Check code and enter new code if necessary.
- Perform basic setting.
- Interrogate fault memory.
◆ The display on -E87 may be switched from °Cto °F and vice versa by pressing the "temperature +" button
with the "recirculated air" button pressed.
◆ If the -E87 continues to function after the ignition has been switched off, use the current flow diagram to
check for a short circuit to positive in the wiring to connector -D- contact -1- (type with two displays) or contact
-10- (type with one display) (connection auxiliary heater operation).
◆ If the display of a newly installed operating and display unit flashes (for approx. 2 minutes) after the ignition
is switched on, encode the operating and display unit and perform basic setting.
◆ If an -E87 operating and display unit with part number as of index "H" is replaced, the temperature is dis‐
played on -E87 in °F in vehicles in which the assignment of the ignition key is transferred from the dash
panel insert. The display can be converted from °F to°C in these vehicles by actuating the "temperature +"
key with the "recirculated air button" pressed. Each ignition key must be converted individually (as all ignition
keys are not generally available in the workshop, the customer must be instructed as to how to perform the
conversion).
◆ Up to and including model year 2000 operating and display units with two displays were installed. As of
model year 2001 there was a changeover to the type with one display.
Note for the type with one display:
This operating and display unit are available in four different types (for vehicles with or without heated seats,
for vehicles with or without radio navigation system).
=> Parts List
Notes for the type with two displays:
◆ If the two display zones in the operating and display unit -E87 with part number 8L0 820 043 up to and
including index "C" are not illuminated when ignition is switched on service voltage supply terminal 58D
(dimmer) to the -E87 according to current flow diagram =>Page
◆
8L0 820 043 B A3 Fully aut. air cond. DXX
Code XXXXX WSC ZZZZZ
-> Only operating and display unit -E87 with part number 8L0 820 043 up to and including index "C" can be
installed in vehicles from model year 1997.
◆ The pin assignment of control and display unit -E 87 has changed at the start of model year 1998 (inputs
for lighting).
◆
8L0 820 043 D A3 Fully aut. air cond. DXX
Code XXXXX WSC ZZZZZ
-> Only operating and display unit -E87 with part number 8L0 820 043 as of index "D" can be installed in
vehicles as of model year 1998.
◆ If the two display zones of the operating and display unit -E87 with part number 8L0 820 043 as of index
"D" are not illuminated when ignition is switched on check voltage supply of terminal 58d (dimmer) to -E87
=>Page 46 (electrical test).
◆ If the two display zones in the operating and control unit -E87 with part number 8L0 820 043 as of index "D"
are not illuminated when the ignition is switched on, check voltage supply from terminal 58s (search light)
to -E87 =>Page 46
◆ If an operating and display unit -E87 with part number 8L0 820 043 as of index "D" is installed in a vehicle
from model year 1997, the brightness of the switch illumination cannot be altered =>Page
check).
◆ If an operating and display unit -E87 with part number 8L0 820 043 as of index "C" is installed in a vehicle
from model year 1998, the brightness of the switch illumination cannot be altered =>Page
check).
◆ The coding for the operating and display unit -E87 is different in vehicles with map-controlled cooling to that
for vehicles without map-controlled cooling (for 1.6l engine to be gradually introduced as of model year
1999).
◆
8L0 820 043 H A3 Fully aut. air cond. DXX
Code XXXXX WSC ZZZZZ
(Electrical check).
Heating, Air Conditioner - Edition 06.2000
46 (electrical check).
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
6.2 - Removing and installing operating and display unit -E87
Audi A3 1997 ➤
46 (Electrical
46 (Electrical
175