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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Data Communications - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC U220A >> Diagnostic Fault Information

Diagnostic Fault Information

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.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
B+ U220A U220A - -
Ignition U220A U220A - -
CAN 5 Serial Data [+] (circuit 4985) U007B* U220A U007B* -
CAN 5 Serial Data [-] (circuit 4984) U007B* U220A U007B* -
Ground - U220A - -
* Other DTCs may set with this fault.