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Model: 2019 Audi A3. Fault phenomenon: The cruise control function fails. Troubleshooting:  (1) Read the trouble code with the ODIS diagnostic instrument: 01—engine control unit record—U041600—ESP untrusted signal (active/static). (2) According to the test plan, it is necessary to compare the configuration of the SVM control units for 01-engine control unit J623 and 03-ABS control unit J104. After the online SVM comparison, it is prompted that the two control units are configured correctly and do not need to be changed. (3) At this time, the ODIS diagnostic instrument has been unable to provide the test plan for maintenance and can...

Model: Mercedes-Benz E300, equipped with 274.920 engine. Driving mileage: 12,415 miles Fault phenomenon: The instrument prompts “Blind Spot Assist Has Stopped Working”. Troubleshooting: Connect the XENTRY diagnostic instrument and conduct a quick test. The integrated radar sensor in the left rear bumper of the B92/11 has set a fault code: C110100 radar sensor 1 has a functional failure, A+S. Check the car’s registration card to confirm that the car is equipped with a blind spot assist system (code 234). The blind spot assist system uses short-range radar to monitor the rear and side areas of the vehicle, and if necessary,...

Model: e-tron System: Transmission Year: 2019 Driving mileage: 9,383 miles Issue: The driver's guide in the instrument cluster displays "Coolant level too low" and the coolant indicator light illuminates in red. Troubleshooting: First check that the coolant level in the expansion kettle is below the lower limit mark. Connect the diagnostic instrument to read the fault code, there is a fault code in the temperature management system control unit J1024 (address code C5): the coolant is insufficient, and the low liquid level of the sensor is displayed. Next troubleshooting for the coolant leak revealed excess coolant inside the front motor....

Model: 2021 Mercedes-Benz GLA200 Issue: The meter displays a white text prompting "Auxiliary battery failure". Troubleshooting: The problem persists, and there is no unusual sensation while driving. Connect the diagnostic instrument to do a brief test and discover that the N73 has set a fault code for the current state: the B21DC01 electronic ignition switch's buffer battery is malfunctioning. Check the vehicle registration card; this vehicle has CODE429, is equipped with a 700.4 seven-speed dual-clutch automatic gearbox, and the parking pawl lifting solenoid valve L21 is part of the electromechanical parking pawl placed on the dual-clutch transmission's casing (as shown...

Model: XC60 System: Electrical Year: 2019 Issue: The air bag light on the instrument lights intermittently.  Troubleshooting: The owner of the car reported that airbag light of the car was on, and sometimes the braking was not easy to use. We heard that he had been to the repair shop for inspection before, yet no problem was found. The car did not light up after being promoted to a higher level, and it has not been used very much recently. We connected the diagnostic instrument and discovered that different modules such as airbag SRS, instrument DIM, wiper switch, air conditioning...