When it comes to diagnosing a Chevrolet Code U2143, it can be a daunting and complex task. This code is typically related to a loss of communication between the vehicle’s Steering Angle Sensor (SAS) and its power mode master, and can be caused by a variety of issues. The system voltage must be between 9-16 volts in order to enable serial data communication to occur, and the DTC Descriptor list should be consulted to determine which module is not communicating. Multiple non-communicating modules can be identified by pinpointing the one closest to the data link connector (DLC). Additionally, some modules may be lacking internal protection for specific voltage ranges, which can lead to this code.
Chevrolet Code U2143 Causes & Solutions
| Cause | Solution |
|---|---|
| Use the DTC Descriptor list to identify non-communicating module | Check the module closest to the data link connector |
| Multiple non-communicating modules | Identify the module closest to the DLC |
| System voltage not between 9-16 volts | Adjust system voltage to the correct range |
| Module lacks internal protection | Replace module to correct internal protection issue |
Check the Data Link Connector (DLC)
When diagnosing a Chevrolet Code U2143, the first step is to use the DTC Descriptor list to identify any non-communicating modules. The module closest to the data link connector (DLC) should be checked first, as multiple non-communicating modules can be identified by pinpointing the one closest to the DLC. Additionally, the system voltage must be between 9-16 volts in order for serial data communication to occur. If the voltage is not within the range, the system should be adjusted to the correct level.
Replace Module if Necessary
In some cases, the module may be lacking internal protection for specific voltage ranges, which can also lead to a Chevrolet Code U2143. If this is the case, the module must be replaced in order to correct the internal protection issue. It is important to note that this process can be quite complex, so it is recommended to seek professional assistance if necessary.
Conclusion
In conclusion, a Chevrolet Code U2143 can be caused by a variety of issues, including a lack of communication between the vehicle’s Steering Angle Sensor (SAS) and its power mode master. The DTC Descriptor list should be consulted to identify any non-communicating modules, and the module closest to the data link connector (DLC) should be checked first. If the system voltage is not between 9-16 volts, it should be adjusted to the correct range. Additionally, if the module lacks internal protection for specific voltage ranges, it must be replaced. To ensure the best results, it is recommended to seek professional assistance when diagnosing and fixing a Chevrolet Code U2143.
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