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Electronic Control System Self-diagnosis One Drive Cycle Detection Method Two Drive Cycle Detection Method Fail-safe Function MIL Bulb Check and Readiness Code Condition Self Shut Down (SSD) Mode 11-22 Fuel and Emissions Systems System Description (cont’d) The functions of the fuel and emission control systems are managed by the engine control module (ECM) on vehicles The ECM/PCM detects a failure of a signal from a sensor or from another control unit and stores a Temporary DTC or a • When an abnormality occurs in the signal from a sensor or from another control unit, the ECM/PCM stores a DTC • When an abnormality occurs in the signal from a sensor or from another control unit in first drive cycle, the ECM/ When an abnormality occurs in the signal from a sensor or from another control unit, the ECM/PCM ignores that signal, When the ignition switch is turned ON (II), the ECM/PCM supplies ground to the MIL circuit for about 15 to 20 seconds After the ignition switch is turned OFF, the ECM/PCM stays on (up to 15 minutes). If the ECM/PCM connector is 05/06/27 17:31:13 61S6M040_110_0022 |