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Home >> Jaguar >> 1993 >> XJ6 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Ignition On Sensing

Ignition On Sensing

This input is taken from terminal No. 87 of ignition on relay which, in addition to applying power to the ignition coil, energizes the main and fuel pump relays through the ECM. A timer is also initiated and permits fuel pump relay operation for 0.5 second to ensure fuel injectors are pressurized prior to cranking engine.