lexus Workshop Repair Guides

Lexus Workshop Service and Repair Manuals

Oil Pressure Switch (For Fuel Pump) > < Intake Air Plenum|Specifications|Page 1604
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Main Relay (Computer/Fuel System): Description and Operation

SFI Main Relay

PURPOSE

The SFI main relay controls the ECM power supply.

LOCATION

Located in the relay box on the left side of the engine compartment.

OPERATION

When the ignition switch is turned to the ON position, the ECM powers the relay coil through terminal M-REL. When powered the relay contacts
close, sending battery voltage to ECM terminals +B and +B1.

Oil Pressure Switch (For Fuel Pump) > < Intake Air Plenum|Specifications|Page 1604