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Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When using this diagnostic, more than one vehicle key is required to ensure proper diagnosis. If more than one key is not available at the time of service, contact the customer and ask if any other keys can be provided for service. If unavailable, a new second key can be created.
  1. Perform the 10-Minute Vehicle Key Relearn procedure. Refer to Replacing Keys (North America except Canada)  or Replacing Keys (Canada, Europe, and Asia) .
  2. While viewing the scan tool TDM Valid Key parameter, turn ON the ignition with each of the available vehicle keys. The parameter should read Yes with all available keys.
    • If not the specified value, replace the affected key.
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