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Home >> Buick >> 2012 >> Enclave FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 146 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1449 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2013 GMC Acadia, 2013 Chevrolet Traverse, and 2013 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the infrared module.
  2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 12 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, rear audio ON, test for 10.0-11.0 volts between the supply voltage circuit terminal 4 and ground.
    • If less than the specified range, test the voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear audio/HVAC module.
    • If greater than the specified range, test the voltage supply circuit for a short to voltage. If the circuit tests normal, replace the rear audio/HVAC module.
  4. If all circuits test normal, replace the infrared module.
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