通用要求因果D技术文档iagnostic Trouble Code (DTC) that leads them to a vehicle warranty repair. The DTC is to be documented in the “Cause Comments” section of the repair order (job card), along with any other diagnostic results. The cause comments from the technician are uploaded with the warranty transaction to GM and help quality engineers understand what repairs are being performed to vehicles and why.
对于2020年的模型年来，记录正确的因果DTC并清楚地识别它在维修令上越来越重要，因为DTC有助于经销商的服务团队确定以下型号的正确保修范围：
- 2020 Chevrolet Corvette.
- 2020 Cadillac CT4
- 2020 Cadillac CT5
The new Corvette, CT4 and CT5 operate on GM’s Next Generation Digital Vehicle Platform. With the new architecture, there are several vehicle components that are referred to as mixed-use parts, which means they control both emissions-related (Fig. 19) and non-emissions-related features on the vehicle. Therefore, depending on the malfunction of that part, warranty coverage may be emissions warranty related, or it may not.
Fig. 19
2020 Corvette的混合用途组件，CT4，CT5
- 身体控制模块
- 鼓风机马达
- 加热和空调用户界面控制
- 传输控制
- 乘坐控制交换机
- 电池监控模块/智能电池传感器
- 车辆稳定控制系统开关
- 蒸发器空气温度传感器
- 可编程温度值执行器
验证和诊断检查发动机灯
没有检查发动机灯-If there is NOT a check engine light illuminated when the vehicle pulls into the service department, there is no need to do anything differently to help your service team identify warranty coverage. If one of these components is affecting vehicle emissions, it will illuminate the check engine light.
检查发动机灯- 执行正常的DTC扫描。在查看DTC显示屏时，可以在选择DTCS时看到新的黄色故障指示灯（MIL）符号。（图20）
图20.
运行DTC扫描后，请按照相应的服务信息中列出的诊断步骤来确定因果DTC，并根据您通常的修复订单记录它。
2020年模型年的新要求
如果因果DTC是有关的排放，则由代码旁边的MIL符号标识，通过打印出车辆DTC显示屏并将其作为易于验证方法附加到维修订单来记录其作为修复的一部分。
了解因果DTC，以及如果在GDS中旁边出现MIL指示符，将有助于保修管理员妥善提交保修索赔。对于未来的索赔超越保险杠保证（或加拿大基本保修），因果DTC在确定维修时的保修范围内也是至关重要的。
- 感谢Patti Marino
