Self-Diagnostic System: Notes
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The PCM is equipped with a self-diagnostic system, which detects system failures or abnormalities. When malfunction occurs, the Malfunction Indicator Light (MIL) on the instrument cluster is turned on.
By analyzing various input signals, the PCM detects system malfunctions compared to various sensor operating parameters. The PCM stores Diagnostic Trouble Codes (DTCs) associated with the detected failure until the PCM memory is cleared. For further information, see appropriate SELF-DIAGNOSTICS article.