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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 226 (Driver Assistance Systems - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC U1960 or U1961 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 10 min for all vehicle systems to power down.
  2. Ignition ON/Vehicle In Service Mode.
  3. Verify DTC U1961 is not set.
    • If the DTC is set 

      Replace the control module that sets the DTC.

    • Go to next step: If the DTC is not set 
  4. Verify DTC U1960 is not set.
    • If DTC U1960 is set 
    1. Ignition/Vehicle OFF, keep the key inside the vehicle.
    2. Perform the Serial Data Authentication Configuration procedure in SPS. Refer to Serial Data Authentication Configuration .
    3. Ignition/Vehicle OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 10 min for all vehicle systems to power down.
    4. Ignition ON/Vehicle In Service Mode.
    5. Verify the DTC does not set as a current DTC.
      • If the DTC sets, replace the control module that sets the DTC.
      • Go to next step: If the DTC does not set
    6. Using a scan tool, clear DTCs.
    • Go to next step: If DTC U1960 is not set 
  5. All OK
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