Circuit/System Verification

2020 GMC Acadia SLE, 2.5L Eng VIN ASECTION Circuit/System Verification
WARNING: This page is about a different car, the 2021 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The passive entry system unlocking function can be disabled through the transmitter or the center stack. The center stack displays the status of the feature. If the feature is disabled the exterior lights will flash quickly 4 times when the passive entry door button is pressed. Refer to owners manual for more information.

In order to determine the best starting point to begin diagnosis first determine which features on the vehicle are functioning correctly or not. By performing a simple and quick check on the vehicle it can be determined if there is or isn't a fault in each feature. If any one part of the feature is faulty then the feature status is failed.

Match the status of all four features and go the suggested link to begin diagnosis.

Active Keyless Entry Verification

  1. Ignition off, stand approximately 10 meters (33 feet) from the vehicle.
  2. Verify the transmitter opens the trunk/rear closure of the vehicle, if equipped.
  3. Verify the transmitter locks and unlocks the vehicle.
  4. Verify the transmitter other optional functions operate (for example - Panic, Remote Start, Convertible Top).
    • If equipped with a trunk/rear closure and not opening or any of the other optional functions 

      Refer to Keyless Entry Transmitter Malfunction in Circuit/System Testing below,

    • Go to next step: If the vehicle either does not lock or does not unlock 

      Go to next step: Continue verification of the other functions. This function is Failed.

    • Go to next step: If the vehicle locks and unlocks 
  5. All OK. This function Passed.

Passive Starting Function Status

    NOTE:

    Perform this verification with each of the transmitters separately. If the concern is only present with one transmitter then the fault is likely with the one transmitter.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.