LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2014 >> Escalade ESV Premium, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1820: Lost Communication with Brake System Control Module on Bus B >> 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
Ignition Voltage (circuit 948) U1820*, U189A in HPCM, U1818 in SDGM U1820*, U189A in HPCM, U1818 in SDGM -  
Ground (circuit 950) - U1820*, U189A in HPCM, U1818 in SDGM -  
PTLAN + (circuit 6105) U0074* U1820*, U189A in HPCM, U1818 in SDGM U0074* -
PTLAN - (circuit 6106) U0074* U1820*, U189A in HPCM, U1818 in SDGM U0074* -
* Other modules/DTCs will set with this fault.
scientia non olet · About LEMON Manuals