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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Driver Assistance Systems) >> Diagnostic Information and Procedures >> DTC B1B48 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2021 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify no other DTCs related to the K73 Telematics Control Module are set.
    • Go to next step: If no other DTCs are set 
  2. Clear DTCs and operate the vehicle in the conditions that the customer experienced.
  3. Verify DTC B1B48 does not set.
    • If DTC B1B48 is set 
    1. Replace the K73 Telematics Control Module.
    2. Clear DTCs and operate the vehicle.
    3. Verify the DTC does not reset.
      • If the DTC resets, replace the K124 Image Processing Module
      • Go to next step: If the DTC does not reset

        Go to next step: All OK.

    • Go to next step: If DTC B1B48 is not set 
  4. All OK. A fault is currently not present and may be an intermittent condition.
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