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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Data Communications - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC U1300-U1344 or U134A-U14FF >> 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. Engine running for 10 s.
  2. Ignition ON/Vehicle In Service Mode, engine OFF, verify DTC U1300-U14FF is not set.
    • If DTC U1300-U14FF is set without other DTCs or symptoms 
    1. Program the device specified by the DTC descriptor  . If the device is not programmable, replace it.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the appropriate device.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If DTC U1300-U14FF is not set 
  3. All OK
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