Audi A5 Service Training page 30

Convenience system central control unit
Starting with the ignition key
An all-new operating logic is used in the new Audi A5 for terminal control and for starting the engine. When
the key is in the ignition lock (NO contact), the electronic ignition lock differentiates between only two differ-
ent key positions:
– Key in rest position
– Key pressed
These two positions are sufficient for complete control of the terminals. The associated logic is represented
by a status graph:
NO contact OFF
Ignition OFF
Remove key
(models with AG: selector lever
must be in "P" position)
NO contact ON
Press the key
(models with HG: vehicle stationary
models with AG: speed P or N)
The engine is running
A function has also been implemented for the emergency shutdown of the engine. This function is identical in
both manual and automatic models.
The following actions will result in an emergency shutdown:
– Pressing the key for too long
or
– Pressing the key twice within a second
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Engine OFF
Insert the key
(models with HG: clutch is not depressed
models with AG: brake is not depressed)
(models with HG: clutch is not depressed
models with AG: brake is not depressed)
Press the key
(models with HG: clutch is depressed
models with AG: brake is depressed
and speed P or N)
HG ... vehicle with manual gearbox
AG ... vehicle with automatic gearbox
Press the key
Press the key
Press the key
(models with HG: clutch is depressed
models with AG: brake is depressed
and speed P or N)
Ignition ON
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