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Home >> Chevrolet >> 2006 >> SSR Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 95 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Navigation System - Voice Recognition Inoperative >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

With OnStar® 

  1. Verify the OnStar® voice recognition is operating normally.
  2. Ignition OFF, disconnect the radio harness connector C2 and VCIM harness connector X3.
  3. Test for less than 1 volt on the C2 radio harness connector terminals 1and 2.
    • If greater than specified value, repair short to voltage.
  4. Test for greater than 1 ohm between the C2 radio harness connector terminal 1and ground.
    • If less than specified value, repair short to ground.
  5. Test for greater than 1 ohm between the C2 radio harness connector terminal 2 and ground.
    • If less than specified value, repair short to ground.
  6. Test for less than 1 ohm between the C2 radio harness connector terminal 1 and the VCIM harness connector terminal 2.
    • If greater than specified value, repair open circuit.
  7. Test for less than 1 ohm between the C2 radio harness connector terminal 2 and the VCIM harness connector terminal 4.
    • If greater than specified value, repair open circuit.
  8. If all circuits test normal, replace the radio.

Without OnStar® 

  1. Ignition OFF, disconnect the voice recognition microphone harness connector and C2 radio harness connector.
  2. Test for less than 1 volt on the voice recognition microphone harness connector terminals 3 and 2.
    • If greater than specified value, repair short to voltage.
  3. Test for greater than 1 ohm between the voice recognition microphone harness connector terminal 3 and ground.
    • If less than specified value, repair short to ground.
  4. Test for greater than 1 ohm between the voice recognition microphone harness connector terminal 2 and ground.
    • If less than specified value, repair short to ground.
  5. Test for less than 1 ohm between the C2 radio harness connector terminal 1 and the voice recognition microphone harness connector terminal 3.
    • If greater than specified value, repair open circuit.
  6. Test for less than 1 ohm between the C2 radio harness connector terminal 2 and the voice recognition microphone harness connector terminal 2.
    • If greater than specified value, repair open circuit.
  7. If all circuits test normal, replace the voice recognition microphone.
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