meaning the energy transmission and data feedback mechanism between the controller and motor construction has failed, belonging to the typical "open circuit and overload" monitoring logic category.

Common Fault Symptoms

When the diagnostic system records and triggers B224913 code, the actual operation performance of the vehicle will present the following characteristics:

• Total Functional Loss: Right rear window motor has no response at all, whether through the switch inside the car lock or independent control buttons on the door panel, it cannot execute lifting action.
• Dashboard Feedback Abnormality: Depending on vehicle configuration, central information display screen or driver side instrument may show relevant prompt symbols during vehicle self-check or fault monitoring.
• Power Assisted Interruption: Since right rear motor circuit monitoring failure, system usually cuts off direct power supply protection mode for that motor, leading to inability to realize window lifting function.

Core Fault Cause Analysis

According to fault logic architecture and electrical diagnostic principles, the trigger mechanism of this fault code mainly stems from hardware or electronic unit abnormalities in the following three dimensions:

• Hardware Component Failure: Right Rear Door Glass Lifting Motor Failure. The motor internal coil may break due to high temperature aging, or permanent magnet loose fixation causes physical mechanical jamming leading to current detection zero state.
• Wiring and Connectors Abnormality: Harness or Connector Fault. Signal transmission cables connecting control unit and motor may have internal short circuit risk caused by insulation layer wear; meanwhile, connector pin withdrawal, oxidation corrosion or sealing failure water ingress may also create open circuit illusion.
• Controller Logic or Circuit Damage: Left Domain Controller Failure. Although physical location may involve right rear door, in current architecture managed uniformly by Left Domain Controller relevant network instructions and current detection circuits. If controller internal drive module damaged or current sampling resistor open, it will also be misjudged as external motor open circuit.

Technical Monitoring and Trigger Logic

The generation of this fault code depends on the control unit's dual dynamic monitoring of supply voltage and load current, its specific judgment logic is as follows:

• Monitoring Target: System continuously collects current feedback data during motor action process when driving window motor in active state.
• Trigger Condition: Only when controller actively instructs driving right rear window motor action, system will start this fault monitoring flow.
• Voltage Threshold Requirements: Premise condition for fault judgment is stable supply environment, i.e., controller input voltage must be maintained between $9V \sim 16V$, to ensure current data validity comparison within effective working window.
• Judgment Logic: When meeting above voltage range and actuator action command takes effect, if control unit feedback loop fails to detect expected drive current signal, system will immediately mark as "Right Rear Window Motor Open Circuit", and save fault code B224913 for subsequent diagnostic query.

Cause Analysis According to fault logic architecture and electrical diagnostic principles, the trigger mechanism of this fault code mainly stems from hardware or electronic unit abnormalities in the following three dimensions:

• Hardware Component Failure: Right Rear Door Glass Lifting Motor Failure. The motor internal coil may break due to high temperature aging, or permanent magnet loose fixation causes physical mechanical jamming leading to current detection zero state.
• Wiring and Connectors Abnormality: Harness or Connector Fault. Signal transmission cables connecting control unit and motor may have internal short circuit risk caused by insulation layer wear; meanwhile, connector pin withdrawal, oxidation corrosion or sealing failure water ingress may also create open circuit illusion.
• Controller Logic or Circuit Damage: Left Domain Controller Failure. Although physical location may involve right rear door, in current architecture managed uniformly by Left Domain Controller relevant network instructions and current detection circuits. If controller internal drive module damaged or current sampling resistor open, it will also be misjudged as external motor open circuit.

Technical Monitoring and Trigger Logic

The generation of this fault code depends on the control unit's dual dynamic monitoring of supply voltage and load current, its specific judgment logic is as follows:

• Monitoring Target: System continuously collects current feedback data during motor action process when driving window motor in active state.
• Trigger Condition: Only when controller actively instructs driving right rear window motor action, system will start this fault monitoring flow.
• Voltage Threshold Requirements: Premise condition for fault judgment is stable supply environment, i.e., controller input voltage must be maintained between $9V \sim 16V$, to ensure current data validity comparison within effective working window.
• Judgment Logic: When meeting above voltage range and actuator action command takes effect, if control unit feedback loop fails to detect expected drive current signal, system will immediately mark as "Right Rear Window Motor Open Circuit", and save fault code B224913 for subsequent diagnostic query.