1991 LEXUS SC400 Service Repair Manual

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Page 1889 of 4087

LEXUS SC400 1991 Service Repair Manual COMPONENTS REMOVAL OF ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS) 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY CAUTION: Turn the ignition switch to ºLOCKº. Discon- nect the cable from the neg

Page 1890 of 4087

LEXUS SC400 1991 Service Repair Manual 3. REMOVE VACUUM CONTROL VALVE SET(a) Disconnect the connector from the VSV. (b) Disconnect the following hoses:(1) Vacuum hose from VSV (2) Vacuum hose from vacuum pipe (c) Remove the two nuts a

Page 1891 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Remove the six nuts and five bolts holding the intake airconnector to the air intake chamber. (c) Disconnect the check connector and harness protector from the air intake chamber. (d) Remove

Page 1892 of 4087

LEXUS SC400 1991 Service Repair Manual 3. INSPECT VSV A. Inspect VSV for open circuitUsing an ohmmeter, check that there is continuity, between the terminals. Resistance (Cold): 38.5±44.5  at 20 5C (68 5F) If there is no continuity

Page 1893 of 4087

LEXUS SC400 1991 Service Repair Manual INSTALLATION OF ACOUSTIC CONTROL INDUCTION SYSTEM (See Components on page FI±57) 1. INSTALL AIR INTAKE CHAMBER (a) Place a new gasket so the protrusion faces the intake chamber. (b) Install a new

Page 1894 of 4087

LEXUS SC400 1991 Service Repair Manual 3. INSTALL NO.2 VACUUM PIPEInstall the vacuum pipe with the two nuts. Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf) 4. INSTALL OIL DIPSTICK FOR ENGINE 5. INSTALL VACUUM TANK AND VSV (a) Install t

Page 1895 of 4087

LEXUS SC400 1991 Service Repair Manual Fuel Pressure Pulsation Damper COMPONENTS FOR REMOVAL AND INSTALLATION FI±58 ± Fuel System (Fuel Pressure Pulsation Damper)EFI SYSTEM WhereEverybodyKnowsYourName

Page 1896 of 4087

LEXUS SC400 1991 Service Repair Manual REMOVAL OF FUEL PRESSURE PULSATION DAMPER (See Component on page FI±58) 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY CAUTION: Work must be started after approx. 20 se- conds or longer from
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