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[Repair Case]: 520Li Fuel Pump Control Regulation Voltage Faulted Issue:  A 2011, BMW 520Li, model F18, with an odometer reading of approximately 25,000 miles. The vehicle was unable to accelerate while driving, and the user noted that the motor shook severely after stopping, before turning off the engine. The instrument's engine fault light illuminates, signaling a problem, and the central information display reads, "The engine power is down, the fuel system has something wrong!" The vehicle can be re-started and driven normally after it has been parked for a period of time.  Diagnosis:  Observe that the engine runs smoothly in...

[Repair Case] A Cadillac’s front wheel and steering wheel shake while steering. Car Series: Cadillac Model: SRX/Kay Leide System: Chassis Issue: When faced with a fast steering or a large turning angle, the front wheel generates a gap brake, and the steering wheel shakes. Diagnosis: Checking the brake mechanism and steering mechanism of the vehicle, no looseness was found. Using car code reader to check the electronic stability system, we got the following error codes: C0460, C046. They indicate ranges for the steering wheel position sensors. Re-entering the data system analysis, it turned out that the steering angle measured by...

Make: BMW 520Li Model: F18. Driving mileage: 49,710 miles Trouble phenomenon: The user reported that the instrument steering system failure warning light was on when the vehicle was driving, and the central information display screen prompts "Steering system, please drive carefully!" When turning the steering wheel, the turning becomes very heavy. Fault diagnosis: Upon inspection, the issue is confirmed, the EPS fault alarm lamp on the instrument panel continues to light up to give an alarm. When turning the steering wheel, the feeling is very heavy, and not assisted. Connect ISID for diagnostic testing, the EPS displayed in the diagnostic tree...

Issue: The customer comes to the store stating that all instrument warning lights are illuminated (as shown in Figure 1), yet the car drives normally.Figure 1 Instrument warning panel (showing all lights on)Model: E66, equipped with M54 engine and 6HP-19 transmission.Driving mileage: 98281 milesDiagnosis: Use ISID to detect fault codes and found the following:CDAB, A389, E107, 5EFE, 5142, A383, A3AA, 9328, 51B9, D707, E287 According to the above fault code analysis, there are several possible causes: ①Damage to multiple control modules or short circuits within a single control module; ②The K-CAN bus system is open or short-circuited; ③Incorrect bus voltage.Moving...

Model: E70, equipped with a 3.0L engine.  VIN: WBAFE4105AL××××××.  Mileage: 84380 miles  Issues:  The customer reported that the two front headlights were always on and could not be turned off, and the turn signal could not be turned on. In addition, none of the windows could be raised or lowered, and the driver window control switch was inoperable.  Diagnosis:   The screen displays prompts to repair the lighting system.  In the test, it was also found that in addition to the malfunctions reported by the customer, the front fog lamp switch failed. After checking all related fuses in the vehicle’s fuse...