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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 262 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B3055: No Transponder Modulation or No Transponder >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC B1370, B1380, or B1441 is not set.
    • If none of the DTCs are set 
  3. Verify the scan tool body control module Accessory parameter changes between Active and Inactive when turning the ignition ON and OFF.
    • If the parameter changes 
  4. Verify all available keyless entry transmitters are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the transmitter to the part number listed in the parts catalog.
    • If a transmitter is not correct 

      Replace the transmitter.

    • If all transmitter are correct 
  5. Remove the battery from each of the available keyless entry transmitters.
  6. Verify that DTC B3055 does not set while attempting to start the vehicle which each available keyless entry transmitter. To start the vehicle with the transmitter battery removed, the transmitter must be placed in the transmitter pocket/slot.
    • If DTC B3055 sets when attempting to start the vehicle with only one of the available transmitters 

      Replace the appropriate transmitter.

    • If DTC B3055 sets when attempting to start the vehicle with all of the available transmitters 

      Replace the K89 Immobilizer Control Module.

    • If DTC B3055 does not set 
  7. All OK.
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