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Notes on display zone 2:
If the vehicle is moving at more than 1 km/h, this speed will be displayed.
Display zone Display
3
Operating and display unit -E87 with two displays
▪ Auxiliary heater.
0 = No auxiliary heater mode (voltage at connector -D- contact -1- less than 5 V).
1 = Auxiliary heater mode (voltage at connector -D- contact -1- greater than 5 V).
Operating and display unit -E87 with one display
▪ Side lights (terminal 58).
0 = Side light off (voltage at connector -D- contact -12- less than 5 V).
1 = Side light on (voltage at connector -D- contact -12- greater than 5 V).
Notes (for display zone 3 with an -E87 with two displays):
◆ There are no immediate plans to install an auxiliary heater in the Audi A3.
◆ If -E87 remains in operation after the ignition is switched off and if the display shows "1", locate and rectify
short to positive to connector -D-, contact -1- using current flow diagram.
Display zone Meaning Explanatory Notes
4 Operating and display unit with two displays and with
part number up to index "E"
▪ Display zone not used.
Ignore display
Operating and display unit with two displays and with
part number with indices "M" or "N"
▪ Assignment of ignition key
Display 0 = The ignition was switched on with a key
for which there is no assignment in the
dash panel insert.
No information was received from the
dash panel insert.
▪ Check adaptation of the ignition key.
=> Electrical System; Repair group 90;
Repair dash panel insert Repair dash
panel insert
Display 1 =
(2, 3 or 4)
The ignition was switched on with the key
which was set to position 1 (2, 3 or 4) in
the dash panel insert.
▪ Up to 4 keys may be assigned.
Notes (for display zone 4 with an -E87 with two displays):
◆ In vehicles from model year 2000, the assignment of the ignition key will be transmitted to the -E87 by the
dash panel insert together with the refrigerant temperature and the signal "Engine temperature too high"
when the ignition is switched on (data telegram). The assignment of the key can only be processed by
operating and display units with the part number 8L0 820 043 as from index "H". If the refrigerant temperature
is too high, no information may be transmitted.
◆ The assignment of the ignition key can only be recognised and therefore transmitted by the dash panel insert
on vehicles fitted with an immobiliser.
=> Electrical System; Repair group 90; Repair dash panel insert Repair dash panel insert
◆ When the ignition is switched on, the -E87 starts with the setting which was valid the last time the ignition
was switched off with this key (temperature, air distribution, fresh air blower speed).
◆ Check signal from dash panel insert =>Electrical check, Page 46 .
Display zone Display
4
Operating and display unit -E87 with one display
▪ Auxiliary heater.
0 = No auxiliary heater mode (voltage at connector -D- contact -10- less than 5 V).
1 = Auxiliary heater mode (voltage at connector -D- contact -10- greater than 5 V).
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
42 01 - Self-diagnosis, Electrical check
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