1991 LEXUS SC400 Service Repair Manual

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Page 2865 of 4087

LEXUS SC400 1991 Service Repair Manual 3. REINSTALL CHECK VALVEHINT: Reinstall the check valve with the black port facing the charcoal canister side. (a) Install the grommet to the check valve. (b) Install the check valve to the hose en

Page 2866 of 4087

LEXUS SC400 1991 Service Repair Manual EXHAUST GAS RECIRCULATION (EGR) SYSTEM DESCRIPTION To reduce NOx emission, part of the exhaust gases are recirculated through\ the EGR valve to the intake manifold to lower the maximum combustion t

Page 2867 of 4087

LEXUS SC400 1991 Service Repair Manual OPERATION (Contd) EC±16± EMISSION CONTROL SYSTEMS Exhaust Gas Recirculation (EGR) System WhereEverybodyKnowsYourName

Page 2868 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF EGR SYSTEM (USA Spec.) INSPECT SYSTEM OPERATION (a) Using SST, connect terminals TE1 and E1 of the check(ºDIAGNOSISº) connector. SST 09843±18020 (b) Keep the engine at 3,500 rpm. (

Page 2869 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF EGR SYSTEM (Exc. USA Spec.) 1. CHECK AND CLEAN FILTERS IN EGR VACUUMMODULATOR (a) Remove the cap and filter. (b) Check the filter for contamination or damage. (c) Using compressed ai

Page 2870 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF VSV (Exc. USA Spec.) 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 is turned

Page 2871 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Apply battery voltage across the terminals. (c) Check that the air flows from port E to the filter. If operation is not as specified, replace the VSV. 4. REINSTALL VSV (a) Install the VSV with

Page 2872 of 4087

LEXUS SC400 1991 Service Repair Manual COMPONENTS FOR REMOVAL AND INSTALLATION OF EGR VALVE ± EMISSION CONTROL SYSTEMS Exhaust Gas Recirculation (EGR) SystemEC±21 WhereEverybodyKnowsYourName
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