U110017 - U110017 Voltage Too High

Detailed Fault Definition

U110017 Voltage High (Voltage High) is a clearly defined fault diagnostic code in automotive electronic control systems, primarily belonging to the power management system or bus voltage monitoring category. In this system, this fault code indicates that a specific Control Unit has detected that the power supply voltage at its input terminal exceeds the preset safe working upper limit.

From a system architecture perspective, the Blind Spot Monitoring System (BSM) relies on a stable power supply to maintain continuous operation and data analysis of radar sensors. When the voltage provided by the vehicle's onboard power supply system becomes abnormal, the internal voltage regulator or ADC sampling module within the control unit will capture signal levels deviating from the normal range. The triggering of this fault code means that the hardware has sensed a transient high-voltage event on the power supply side, and the duration of this event has reached the threshold set by the diagnostic logic. It is a special form of U-Code (General Power Performance) failure, directly associated with the electrical integrity of the Left Rear Corner Radar sensor and its power supply chain.

Common Fault Symptoms

When the monitoring unit determines that trigger conditions are met, the blind spot monitoring system will enter a protection state. Specific phenomena perceivable by the user are as follows:

• Total Function Failure: The blind spot monitoring system stops working and cannot monitor traffic conditions behind and to the rear in real time; relevant warning logic terminates.
• Abnormal Dashboard Display: The Blind Spot Monitoring Indicator Light (BSM Indicator) on the vehicle dashboard may extinguish, fail to light up, or display a fault icon (e.g., exclamation mark/circle).
• Lack of Auxiliary Functions: If the system is configured with blind spot linkage functions (such as partial interaction with adaptive cruise control), relevant dynamic responses will pause.

Core Fault Cause Analysis

Based on diagnostic logic, the root causes leading to the generation of U110017 fault code focus mainly on hardware components, wiring connections, and control logic in three dimensions:

• Hardware Component Abnormality: The Left Rear Corner Radar itself or its internal power supply module suffers physical damage. In addition, the vehicle's onboard power supply system itself has unstable factors, such as a malfunctioning generator regulator or voltage stabilizer failure, causing output voltage to rise continuously.
• Wiring and Connector Interference: Although open circuit is not explicitly mentioned, high voltage often accompanies poor grounding or external high voltage intrusion. The power line connecting the radar and control unit may be affected by reverse feed (Backfeed) from a high-voltage source.
• Controller Logic Misjudgment: Due to signal interference caused by other faults, it may cause the control unit to make logical errors on power sampling signals, resulting in false reports of a voltage high state.

Technical Monitoring and Trigger Logic

The control unit monitors the instantaneous voltage value of the power port in real time through its internal high-precision voltage monitoring circuit. The logic flow for judging this fault includes the following specific numerical constraints and operating conditions:

• Monitoring Target: Power rail voltage for the Left Rear Corner Radar supplied by the vehicle's onboard power system.
• Threshold Judgment Criteria: When the real-time sampled power supply voltage is higher than $16V$, the monitoring state enters a "potential fault" interval.
• Duration Requirement: The above high-voltage state must continue for more than $1000ms$ milliseconds for the system to confirm it as a valid fault signal, to exclude transient surge interference.
• Trigger Conditions and Timing: This fault diagnosis logic only starts monitoring after the vehicle completes power-on initialization. Specifically, evaluation of the above voltage and time conditions must begin Power-on Initialization $3s$ after. Only if the timing constraints are satisfied will the system light up the fault lamp and store DTC code.