LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Data Communication System - DTC B1000 To DTC U1818 >> Diagnostic Information and Procedures >> DTC U1817: Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus >> Diagnostic Fault Information
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
B+ U1817 U1817 - -
Ignition U1817 U1817 - -
Accessory Wake Up Serial Data 2 P06E4, U1817* U1817* - -
Powertrain High Speed GMLAN Serial Data (+) U0074* U0074, U1817* U0074* -
Powertrain High Speed GMLAN Serial Data (-) U0074* U0074, U1817* U0074* -
Ground - U1817* - -
* Other DTCs may set with this fault.
scientia non olet · About LEMON Manuals