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DIAGNOSIS SYSTEM (ECM) EC-57 < SYSTEM DESCRIPTION > [VK56DE] C D E F G H I J K L M A EC N P O *1: This function is not necessary in the usual service procedure. ACTIVE TEST MODE Test Item TARGET IGN TIM ADJ* 1 • IDLE CONDITION When adjusting target ignition tim- CLSD THL POS LEARN • Ignition on and engine stopped. When learning the throttle valve SAVING DATA FOR REPLC CPU In this mode, save data that is in ECM. When ECM is replaced. WRITING DATA FOR REPLC CPU In this mode, write data stored by “SAVE DATA FOR CPU When ECM is replaced. WORK ITEM CONDITION USAGE TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY) FUEL INJEC- • Engine: Return to the original trouble condition • Change the amount of fuel injec- tion using CONSULT. If trouble symptom disappears, see • Harness and connectors ENG COOLANT • Engine: Return to the original trouble condition • Change the engine coolant tem- perature using CONSULT. If trouble symptom disappears, see • Harness and connectors sor • Fuel injector PURG VOL • Engine: After warming up, run en- gine at 1,500 rpm. • Change the EVAP canister purge volume control solenoid valve Engine speed changes according to • Harness and connectors FUEL/T TEMP • Change the fuel tank temperature using CONSULT. ALTERNATOR • Engine: Idle SULT. Battery voltage changes. • Harness and connectors FUEL PUMP RE- • Ignition switch: ON (Engine stopped) • Turn the fuel pump relay ON and OFF using CONSULT and listen Fuel pump relay makes the operat- • Harness and connectors IGNITION TIM- • Engine: Return to the original trouble condition • Timing light: Set CONSULT. If trouble symptom disappears, see • Perform Idle Air Volume Learning. POWER BAL- • Engine: After warming up, idle the engine. • A/C switch: OFF a time using CONSULT. Engine runs rough or dies. • Harness and connectors |