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Home >> Jaguar >> 1992 >> XJ-S V12-5.3L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Main Relay (Computer/Fuel System) >> Description and Operation
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Main Relay (Computer/Fuel System): Description and Operation


PURPOSE
The main relay supplies power to the ECM, oxygen sensor heaters, injectors and fuel pump relay.

OPERATION
The main relay is energized directly through the inertia switch when the ignition is switched "ON" or engine is cranking. The main switching relay has been eliminated.


Relay Locations And I.D.:




Component Panel Locations:





LOCATION
Right side of trunk near ECM.