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ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-587 [QG (WITHOUT EURO-OBD)] C D E F G H I J K L M A EC A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated ) How to Erase Diagnostic Test Mode II (Self-diagnostic Results) The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to 585, "HOW TO SWITCH DIAGNOSTIC TEST MODE" . ● If the battery is disconnected, the DTC will be lost from the backup memory after approx 24 hours. ● Be careful not to erase the stored memory before starting trouble diagnoses. DIAGNOSTIC TEST MODE II — HEATED OXYGEN SENSOR 1 MONITOR In this mode, the MI displays the condition of the fuel mixture (lean or rich) which is monitored by the heated *: Maintains conditions just before switching to open loop. To check the heated oxygen sensor 1 function, start engine in the Diagnostic Test Mode II and warm it up until MI Fuel mixture condition in the exhaust gas Air fuel ratio feedback control condition ON Lean Closed loop system OFF Rich *Remains ON or OFF Any condition Open loop system |