Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. 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 |
|---|---|---|---|---|
| SDG Module B+ Voltage | *U1862, U1888, U1878, U1875, U1821, U1812, U0129 | U1862, U1821, U1812 | - | - |
| SDG Module Serial Data Communication Enable | U1862 | U1862 | - | - |
| High Speed GMLAN Serial Data Bus - | *U1862, U1888, U1886, U1885, U1879, U1878, U1876, U1875, U1866, U0140, U0129, U0102, U0101, U0100 | *U1888, U1878, U8175, U0129 | *U1862, U1888, U1886, U1885, U1879, U1878, U1876, U1875, U1866, U0140, U0129, U0102, U0101, U0100 | - |
| High Speed GMLAN Serial Data Bus - | *U1862, U1888, U1886, U1885, U1879, U1878, U1876, U1875, U1866, U0140, U0129, U0102, U0101, U0100 | *U1888, U1878, U8175, U0129 | *U1862, U1888, U1886, U1885, U1879, U1878, U1876, U1875, U1866, U0140, U0129, U0102, U0101, U0100 | - |
| SDG Module Ground | - | U1862, U1821, U1812 | - | - |
| Drive Motor Generator Battery Control Module B+ Voltage | *U1862, U1888, U1878, U1875, U1821, U1812, U0129 | **U1888, U1878, U1875, U0129 | - | - |
| * No crank, no start. Battery pack contactors are open. drive motor generator battery control module and SDG module will both be inoperative. ** No crank, no start. Battery pack contactors are open. drive motor generator battery control module is inoperative. |
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