9-5 (9600) L4-2.3L Turbo (2.3 T) (2006)
As soon as the engine has started, the control module regulates all functions automatically.
Ignition OFF
When the ignition is turned off, the display goes out: no buttons work, all the stepping motors are turned off and air recirculation off is selected after 10
seconds. Diagnostics communication remains active if it was active when the ignition was turned off, but it cannot be restarted.
When approximately 8 minutes has passed, the air distribution damper moves to the floor position, 50% during cold weather and to ventilation position
0% during hot weather. The air-blending flap moves to max. cold position 0%. After 10 minutes the ACC control module moves down in energy-saving
mode and the processor activates briefly every 4 minutes. This will continue for a further 110 minutes. Within this time (2 hours) the ACC control
module can read the parameters and calculate the conditions for a good environment in the car's cabin.
If the ignition is switched on within these 120 minutes the control module will keep the manual options that may have been selected during the previous
operation.
After 120 minutes the control module starts in AUTO mode or without user programmed mode.
Warm start
If the ignition is switched on after having been switched off for a time shorter than 120 minutes then the start is counted as a warm start.
Cold start
If the ignition is switched on after 120 minutes then the start is counted as a cold start.
Programming
A number of parameters must be programmed when changing the ACC unit.
Diagnostics
In the event an internal fault in the control module, diagnostic trouble code B1605 is generated
Control module power supply