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 |
|---|---|---|---|---|
| ECM B+ | 1* | 1* | - | - |
| ECM Ground | - | 1* | - | - |
| PTLAN + | U0074* | U1818*, U189A | U0074* | - |
| PTLAN - | U0074* | U1818*, U189A | U0074* | - |
| * Other modules/DTCs will set with this fault. 1. Multiple DTCs including U1818 may set, and multiple symptoms including no start may occur |
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