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ENGINE <TURBO> Control System DIAGNOSTIC SYSTEM DESCRIPTION OF SYSTEM The engine control module (ECM) monitors its input/ After detecting a fault, the engine control module it re-detects the same fault in an operation following the next engine startup. In regard to the items marked however, the engine control module stores the diagnostic trouble code it. There are 35 diagnostic items, and the diagnostic Moreover, since memorization of the diagnostic trouble codes is backed up directly by the battery, ignition key is turned off. The diagnostic trouble terminal or the engine control module connector is disconnected. from the scan tool to the engine control module. NOTE Data item Engine coolant temperature Engine speed Vehicle speed Long term fuel trim Short term fuel trim Fuel control state Calculated load value Diagnostic trouble code associated with the data in is memorized. In this case, send the diagnostic trouble code erase signal from the scan tool to the engine control module and the diagnostic memory The 35 diagnostic items are provided as follows, NOTE The diagnostic trouble code of ignition timing adjust- ment signal is outputted when terminal for ignition timing adjustment is grounded. Therefore, it is not minal for ignition timing adjustment is grounded for The engine control module stores in memory not However, when the engine control module detects a misfiring or fuel trim malfunction, it clears the below. Unit km/h Open loop l Closed loop l Open loop drive condition l Open loop DTC set l Closed loop (rear) trouble |