P1AD698 - P1AD698 Charging Port Temperature Severe High 3

P1AD698 Charging Port Temperature Excessively High 3 Fault Depth Definition

P1AD698 is a specific Diagnostic Trouble Code (DTC) in the vehicle electronic electrical architecture targeting thermal safety monitoring for high-voltage AC charging systems. This code identifies "Charging Port Temperature Excessively High 3", indicating that the onboard power assembly or Battery Management System (BMS) has identified, via internal algorithms, that the real-time temperature feedback from the AC charging interface has exceeded preset safety thresholds.

At the system control logic level, this fault code involves critical physical quantity monitoring and protection mechanisms. When the vehicle network receives abnormal data streams from the AC Charging Port Temperature Sensor, the control system judges the current thermal environment to be at an uncontrollable risk level. This fault definition aims to forcibly initiate limit-power or cut-off charging input strategies to avoid serious safety accidents caused by high temperatures, such as insulation layer aging, connector deformation, or even combustion. Its core role lies in connecting the feedback loop between physical environmental temperature (charging port) and the vehicle high-voltage charging control unit, ensuring thermal stability during energy transmission.

Common Fault Symptoms

When P1AD698 fault code is activated and recorded, drivers or users usually observe the following perceptible system behavior changes during the charging process:

• Charging Power Limitation: To protect battery and interface safety, the vehicle automatically reduces charging input power, resulting in a significant reduction in charging speed compared to the set value.
• Abnormal Charging Status Display: Vehicle dashboard instruments, mobile phone Apps, or charging pile terminals may display charging interruption, error code prompts, or blinking charging indicator lights.
• System Log Recording: The vehicle's fault diagnosis interface (OBD) can read P1AD698, indicating the system has executed power limit protection logic rather than a complete power cut-off.

Core Fault Cause Analysis

From a technical perspective, potential root causes for this fault code are classified into anomalies across three dimensions: hardware components, wiring physical connections, and controller logic operations:

• Hardware Component Failure:
  • AC Charging Port Temperature Sensor Failure: Damage to the sensor's internal sensing elements or signal conversion modules, preventing accurate temperature value output.
• Wiring and Connector Anomalies:
  • Harness or Connector Failure: Wires connecting sensors and control units may experience open circuits or short circuits, or connector pins may have poor contact, water intrusion, or oxidation, causing unstable signal transmission or voltage drift.
• Controller Logic Operation Deviation:
  • Onboard Power Assembly Failure: Internal thermal management module processing anomalies within the power assembly.
  • Battery Management System Failure: Incorrect parsing algorithms by the BMS internal control unit on sensor data, or abnormal system communication protocols, leading to false positives in judgment.

Technical Monitoring & Trigger Logic

The vehicle electronic control system follows a strict logical judgment process to generate P1AD698 fault codes, with specific monitoring mechanisms as follows:

• Fault Condition Setting:
  • Monitoring begins only when the Vehicle AC Charging Status is activated. If the vehicle is not in a charging state, relevant threshold comparison functions are temporarily inactive.
• Trigger Fault Condition:
  • Dynamic Signal Monitoring: During vehicle charging, the control unit continuously reads real-time feedback values from temperature sensors.
  • Abnormal Judgment Logic: When the control system receives abnormal signal values from the AC charging port temperature sensor (i.e., signal values exceed normal safe ranges or show untrustworthy jumps), the system immediately executes fault judgment logic.
  • Fault Generation: After satisfying the above conditions, the system automatically generates P1AD698 fault code and triggers corresponding protection strategies (e.g., power limiting).