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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)] 01–02B–76 7 VERIFY HIGH-TENSION LEAD CONDITION • Remove high-tension lead. • Check high-tension lead condition and tension lead insulator • Is high-tension lead okay? Yes Go to next step. No Replace high-tension lead, then go to Step 13. 8 INSPECT FOR AIR SUCTION AT INTAKE-AIR • Inspect for air leakage at following: intake manifold — Around connection of intake manifold and cylinder head • Is air leakage found? Yes Repair or replace suspected part, then go to Step 13. No Go to next step. 9 INSPECT FUEL INJECTOR HARNESS • Remove intake-air system parts. • Disconnect fuel injector connector on • Connect TEST LIGHT (LED) to fuel injector • Check dim of light during cranking. • Does TEST LIGHT (LED) illuminate? Yes Go to next step. No Check for fuel injector harnesses. 10 INSPECT SEALING OF ENGINE COOLANT Warning •••• Removing radiator cap when radiator is •••• When removing radiator cap, wrap thick • Remove radiator cap. • Implement procedure to bleed air from engine • Is there any small bubble which makes engine Note • Large bubbles are normal since they are Yes Air gets in from poor sealing on head gasket or other areas between combustion chamber and engine coolant No Go to next step. 11 INSPECT ENGINE COMPRESSION • Inspect engine compression. • Is engine compression okay? Yes Go to next step. No Overhaul the engine, then go to next step. 12 INSPECT FUEL INJECTOR OPERATION • Remove fuel injector from suspected cylinder. • Swap injector with injector on other cylinder. • Start engine and run it at idle. • Does misfire DTC move to cylinder with Yes Replace injector, then go to Step 13. No Go to next step. STEP INSPECTION ACTION 1712-1U-01G(01-02B).fm 76 ページ 2001年6月29日 金曜日 午後3時24分 |