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Home >> GMC >> 2012 >> Yukon Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1128 (Keyless Entry System & Remote Functions) >> Diagnostic Information and Procedures >> Electronic Key Not Detected >> Circuit/System Verification
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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: This condition may be caused by low vehicle battery voltage. If the battery is not sufficiently charged (above 10 volts), the system will have difficulties detecting the fob and the ELECTRONIC KEY NOT DETECTED message will be displayed. Correct the low battery voltage condition to eliminate this condition.
  1. With the vehicle locked, attempt to passively unlock and enter the vehicle by approaching the vehicle with a valid transmitter and pulling the exterior door handle. The door should unlock and open.
  2. While placing the keyless entry transmitter in various locations within the vehicle interior, verify the vehicle does not start.
    • If the vehicle starts, inspect for any sources of RF interference such as cell phone chargers, power supplies, etc. that would interrupt transmitter and antenna communication.