Diagnostic System Check - Engine Controls (Chart 1 of 2)

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OBD System Check

Schematic

Since a scan tool is required to perform any diagnostic, this is the starting point. The PCM and the ABS, if equipped, share the same data link, referred to as the class II data bus. The air bag system uses its own data link, which is not connected to the class II data bus.

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Document Title: Diagnostic System Check - Engine Controls (Chart 1 of 2)

data

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engine