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Home >> GMC >> 2007 >> Acadia SLT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 404 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Navigation System - Voice Recognition Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the OnStar® voice recognition is operating normally.
    • Disconnect the radio harness connector. While holding the voice recognition button down, measure for 600Ω to 800Ω across the steering wheel control signal terminal (11) and the steering wheel control supply voltage terminal (10).
    • If ohms are below or above the specified value, replace the steering wheel voice recognition switch.
  2. Test the audio mic in circuits for an open, short to ground or a short to power. If all circuits test normal replace the radio.
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