XK-8 Coupe (X100) V8-4.0L (AJ27) (1999)
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Heater circuit judgments are made by comparing the expected heater drive state with the actual state. If these states are different for too long then the
heater circuits are judged to be faulty.
For all the above diagnostics, the relevant DTC is stored if the failure judgment is made on two successive trips.
Circuit Diagram, O2 Sensors/ECM
