XJ-6 (X300) L6-4.0L (AJ16) (1996)
Compressor Clutch: Description and Operation
System Protection
Power to the compressor clutch may be cut should either the engine management or air conditioning control systems detect certain conditions; these
conditions may be caused by Fault or Demand and can be classified thus:
Fault
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Engine coolant overheat.
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Refrigerant excessive pressure.
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Refrigerant, insufficient pressure or low charge weight.
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Speed differential between compressor and crankshaft caused by belt slippage or compressor seizure (indicated by A/C state lamp flashing once
per second) 12 cylinder engine only. This feature, 'lock sensing' is fully explained in the EDM.
Demand
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Engine maximum power requirement
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Electrical system drain at engine idle.