1991 LEXUS SC400 Service Repair Manual

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Page 1937 of 4087

LEXUS SC400 1991 Service Repair Manual 5. INSPECT FUEL PUMP ECU(a) Connect the cable to the negative (±) terminal of thebattery. (b) Check the connector on the wiring harness side as shown in the chart. Check forTester connectionCond

Page 1938 of 4087

LEXUS SC400 1991 Service Repair Manual (c) Install the belt hole cover with the two clips. (d) Install the rear side of the scuff. 8. REINSTALL SEAT BACK AND CUSHION 9. RECONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY FI±84 ± EFI S

Page 1939 of 4087

LEXUS SC400 1991 Service Repair Manual ELECTRONIC CONTROL SYSTEM Location of Electronic Control Parts FI±84 ± Electronic Control\ System (Location of Electronic Control Parts)EFI SYSTEM

Page 1940 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 1941 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 1942 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 1943 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 1944 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
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