Range Rover Sport (LS) V8-4.2L SC (2006)
Fuse Block: Description and Operation
Central Junction Box
The ECM (engine control module) is connected to ignition switch positions I and II. When the ignition is turned ON, 12V is applied to the ignition sense
input. The ECM (engine control module) then starts its power up routines and turns ON the ECM (engine control module) main relay, the main power to
the ECM (engine control module) and it's associated system components. When the ignition is turned OFF the ECM (engine control module) will
maintain its powered up state for up to 20 minutes while it initiates its power down routine and on completion will turn OFF the ECM (engine control
module) main relay. The ECM (engine control module) will normally power down in approximately 60 seconds, do not disconcert the battery until the
ECM (engine control module) is completely powered down.