Audi 2003 A8 Technical Features page 44

Engine, Mechanics
Explanatory notes on internal control unit
sequence chart
Request for starting (terminal 50 ON from
entry and start authorisation control unit
J518) energises the two relays. Locking-in
takes place during the initialisation phase of
engine control unit J623.
Term. 15
Start request from
driver authorisation
system
Engine start
recognition
(engine speed)
Relay deenergisation by
engine control unit
Term. 50R/diagnosis
Engine control unit
initialisation
Engine control unit active
44
After initialisation, the engine control unit
assumes further starter control tasks as described
under item 3.
Start request briefly activated
Starter speed
Starter operation feedback signal
Locking-in
Starting
Ignition on
Start request retained manually
Engine control unit active
Engine speed increases
Relay deenergisation
Engine running
SSP282_064