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Home >> Chevrolet >> 2001 >> Lumina >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 3.1L >> System Tests >> Data Link Connector Diagnosis >> Circuit Description
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Circuit Description

The Class 2 serial data circuit to the DLC allows bi-directional communication between the PCM and the scan tool. If communication between the scan tool and the PCM cannot be established, DIAGNOSTIC PROCEDURE  should be used to diagnose the condition.

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