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Home >> Cadillac >> 2016 >> ELR >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Data Communication System - DTC B1000 To DTC U183B >> Diagnostic Information and Procedures >> DTC U1793: 14V Power Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus >> Diagnostic Fault Information
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Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
B+ U1793* U1793 - -
Ignition U1793* U1793* - -
Accessory Wakeup Serial Data 2 P06E4, U1793* U1793* - -
Powertrain High Speed GMLAN Serial Data (+) U0074* U0074, U1793* U0074* -
Powertrain High Speed GMLAN Serial Data (-) U0074* U0074, U1793* U0074* -
Ground - U1793* - -
* Other DTCs may set with this fault.
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