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Engine Controls Schematic Icons

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Engine Controls Schematic Icons

Icon Icon Definition
GM19385Courtesy of GENERAL MOTORS CORP.
NOTE: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit.
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