Vanden Plas (X308) V8-4.0L (AJ27) (2000)
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Blower Motor: Description and Operation
Blower Motor Speed Control
The A/CCM controls the speed of two blower motors which deliver airflow to the air conditioning unit. The blower motors are regulated by power
transistor modules which provide a linear variation of blower speed.
Filter Compensation
Where particle filters are fitted as 'after market' items the A/CCM program must be changed to allow higher AUTO blower speeds; this compensates for
the slight loss of air flow. Access to the program is by PDU.
Vehicles with filters fitted OEM will have this facility enabled by Jaguars Cars Ltd.
Relationship Manual Control Blower Speed / Voltage
NOTE: Blower motors are inhibited when the engine coolant temperature is below 35°C and heating is demanded, unless DEFROST / DEMIST is
selected.
