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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 >> Scan Tool Does Not Communicate with Vehicle >> 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
K56 Serial Data Gateway Module B+ 1 1 - -
X84 Data Link Connector CAN 6 Serial Data (+) Terminal 6 1 1 1 -
X84 Data Link Connector CAN 6 Serial Data (-) Terminal 14 1 1 1 -
K56 Serial Data Gateway Module Ground - 1 - -
X84 Data Link Connector Ground Terminal 5 - 1 - -
1. No communication with the vehicle.