9-5 Linear (9600) L4-2.3L Turbo (2.3t) (2004)
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Control Module HVAC: Description and Operation
Control Module
Control Module
The control module is built into the ACC unit and is activated by +15 or the parking heater input. When the control module is active this can be noticed
by the background lighting being on and the diagnostic communication being possible. After the control module has been activated from +15 it can adopt
the following conditions:
Engine stationary
If the engine is stationary, there is no coolant circulating through the heat exchanger, the A/C compressor is stationary and the generator is not charging.
This means that the system cannot regulate the climate, that the system should not consume current unnecessarily and that there is a risk that a stepping
motor may miss a step due to low battery voltage if the starter motor should be engaged. For these reasons, the control module selects rear window
heating off, fan current 0 A, air recirculation off and all stepping motors off. (Manual adjustment is possible)
Engine running
