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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> Blower Motor Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, command the blower motor ON and OFF with a scan tool. The blower motor should turn ON and OFF when changing between the commanded states.
  2. Observe the scan tool Commanded Blower parameter while changing the blower motor switch from Off through to the High speed positions. The display should change from 0-100 percent.
    • If the display does not change, replace the HVAC control module.
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