9-3 Viggen Coupe (9400) L4-2.3L Turbo (B235) HO (1999)
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Control Module HVAC: Description and Operation
User Programming, ACC
User Programming
The ACC control module can be programmed by the user. This means that manual selections are saved so that the control module selects these after
starting. Functions that have not been selected manually when programming will be controlled automatically.
Programming is performed by simultaneously pressing "fan up" and "ECON".
Cancellation of programming is done by simultaneously pressing "floor" and "electrically heated rear window". In both cases, the selection is
acknowledged by the display lighting going off for 250 ms.
The control module processor is active 10 minutes after the ignition has been turned off. If the ignition is turned back on within these 10 minutes, any
manual selections made during previous driving will be retained. After these 10 minutes, the control module will start by using the user programmed
selections.
NOTE: Experience shows that half of all ACC control modules that claims were made for during the warranty period were free of defects but user
programmed. It is therefore very important to explan the function to the customer.
Adjusting
Using the diagnostics tool, the ACC unit can be adjusted to always start with any manual selections made during previous driving.
