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Home >> Buick >> 1996 >> Regal Limited >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Automatic >> Self-Diagnostics >> Code 07, Serial Data Line Test

Code 07, Serial Data Line Test

Connect Tech 1 scan tester to Data Link Connector (DLC). Turn ignition on. If communications cannot be established with PCM, see appropriate ENGINE PERFORMANCE article in the ENGINE PERFORMANCE Section. If communications can be established with PCM, check Tan wire at DLC terminal No. 9 for open circuit or poor connection. If circuit is okay, replace A/C-heater control.

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