1991 LEXUS SC400 Service Repair Manual

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Page 2465 of 4087

LEXUS SC400 1991 Service Repair Manual EFI Main Relay INSPECTION OF EFI MAIN RELAY 1. REMOVE EFI MAIN RELAY FROM RELAY BOX IN ENGINE COMPARTMENT 2. INSPECT EFI MAIN RELAY A. Inspect relay continuity (a) Using an ohmmeter, check that th

Page 2466 of 4087

LEXUS SC400 1991 Service Repair Manual Ignition Main Relay INSPECTION OF IGNITION MAIN RELAY 1. REMOVE IGNITION MAIN RELAY FROM RELAY BOX INENGINE COMPARTMENT 2. INSPECT IGNITION MAIN RELAY A. Inspect relay continuity (a) Using an ohm

Page 2467 of 4087

LEXUS SC400 1991 Service Repair Manual Cold Start Injector Time Switch COMPONENTS FOR REMOVAL AND INSTALLATION FI±87 ± Electronic Control System (Cold St\ art Injector Time Switch)EFI SYSTEM WhereEverybod

Page 2468 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF COLD START INJECTOR TIME SWITCH 1. REMOVE LOWER HIGH±TENSION CORD COVER(See steps 1, 2 and 5 to 12 on pages FI±27 to 29) 2. REMOVE RH IGNITION COIL (a) Disconnect the ignition coi

Page 2469 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Install the cam position sensor connector to the ignitioncoil bracket. (c) Connect the ignition coil connector. 7. REINSTALL LOWER HIGH±TENSION CORD COVER (See steps 1 to 13 and 16 to 18 on p

Page 2470 of 4087

LEXUS SC400 1991 Service Repair Manual VSV for Fuel Pressure Control FI±90 ± Electronic Control System (VSV for Fue\ l Pressure Control)EFI SYSTEM WhereEverybodyKnowsYourName

Page 2471 of 4087

LEXUS SC400 1991 Service Repair Manual COMPONENTS FOR REMOVAL AND INSTALLATION FI±91EFI SYSTEM ± Electronic Control System (VSV for Fuel Pressure Control) WhereEverybodyKnowsYourName

Page 2472 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF VSV FOR FUEL PRESSURE CONTROL 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY CAUTION: Work must be started after approx. 20 se- conds or longer from the time the ignition switch
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