meaning of this DTC lies in the controller identifying an unintended low-resistance connection between the signal output terminal and the vehicle chassis ground through monitoring the impedance characteristics of the drive circuit. At the system architecture level, this fault reflects damaged integrity of the folding motor power or signal circuit. When executing the right side exterior mirror folding instruction, the control unit expects to obtain normal load current feedback, but actually detects that the drive circuit conducts directly to ground potential (Ground), leading the control logic to judge "to-ground short circuit". This type of fault usually belongs to the category of serious anomalies in the electrical system, involving physical connection status between the domain controller and end-effector or component internal failure, directly affecting the availability of vehicle auxiliary functions.

Common Fault Symptoms

When this DTC is illuminated or stored in the diagnostic system, specific phenomena can be observed by car owners regarding driving experience and instrument feedback:

• Function Execution Abnormal: Right side exterior mirror folding function completely fails, regardless of operation method (automatic sensing or manual button press), motor cannot respond to folding instructions.
• System State Locked: Due to detected short circuit protection logic involvement, vehicle electronic architecture may temporarily disable relevant control outputs to prevent electrical system overload or damage domain controller.
• Fault Indicator Feedback: Dashboard may show related Body Control Module (BCM) or rearview mirror function warning lamp prompts, specific depending on vehicle configuration.
• Intermittent Operation Obstacle: Under specific vibration environments or temperature changes, short circuit connections may present instability, leading to folding action failure to maintain or abnormal current fluctuations.

Core Fault Cause Analysis

Based on diagnostic data analysis, the root causes of this fault can be summarized into the following three technical dimensions, requiring distinction from hardware components, wiring connections, and control logic:

1. Wiring and Connector Integrity Damaged: Involves physical connection faults in right side exterior mirror folding motor harness or connector. Such situations include wire insulation layer wear leading to grounding, plug pin pull-out causing ground conduction, or connector seal failure introducing moist environment leading to parasitic ground paths. Physical damage is the most common manifestation of short circuit faults.
2. Actuator (Right Side Exterior Mirror Folding Motor) Internal Failure: The right side exterior mirror folding motor's own stator coil insulation layer damage or internal winding abnormality leads to a direct electrical path between the motor rotating magnetic field and casing. In this case, the motor as a load unit no longer has normal impedance characteristics, presenting low resistance state directly connected to ground loop.
3. Controller Logic or Hardware Fault: Involves Left Domain Controller fault. Although right side exterior mirror is on the right, some vehicle architecture uses centralized area control design, folding motor drive instructions may be routed via central gateway or managed uniformly by left domain controller. If this controller internal power stage (e.g., MOSFET) breaks down or its internal detection circuit logic error, it may also trigger system to report to-ground short circuit signal.

Technical Monitoring and Trigger Logic

Fault determination depends on control unit dynamic electrical parameter monitoring under specific operating conditions, technical logic as follows:

• Monitoring Targets: System focuses on right side exterior mirror folding motor drive circuit output voltage, current duty cycle, and loop resistance value. Main focus is whether load side to-ground voltage appears abnormal drop or current exceeds preset safety threshold.
• Trigger Operating Conditions:
• Power State: Start switch placed at ON Position. At this time vehicle low voltage power supply system is activated, control unit enters active

Cause Analysis Based on diagnostic data analysis, the root causes of this fault can be summarized into the following three technical dimensions, requiring distinction from hardware components, wiring connections, and control logic:

1. Wiring and Connector Integrity Damaged: Involves physical connection faults in right side exterior mirror folding motor harness or connector. Such situations include wire insulation layer wear leading to grounding, plug pin pull-out causing ground conduction, or connector seal failure introducing moist environment leading to parasitic ground paths. Physical damage is the most common manifestation of short circuit faults.
2. Actuator (Right Side Exterior Mirror Folding Motor) Internal Failure: The right side exterior mirror folding motor's own stator coil insulation layer damage or internal winding abnormality leads to a direct electrical path between the motor rotating magnetic field and casing. In this case, the motor as a load unit no longer has normal impedance characteristics, presenting low resistance state directly connected to ground loop.
3. Controller Logic or Hardware Fault: Involves Left Domain Controller fault. Although right side exterior mirror is on the right, some vehicle architecture uses centralized area control design, folding motor drive instructions may be routed via central gateway or managed uniformly by left domain controller. If this controller internal power stage (e.g., MOSFET) breaks down or its internal detection circuit logic error, it may also trigger system to report to-ground short circuit signal.

Technical Monitoring and Trigger Logic

Fault determination depends on control unit dynamic electrical parameter monitoring under specific operating conditions, technical logic as follows:

• Monitoring Targets: System focuses on right side exterior mirror folding motor drive circuit output voltage, current duty cycle, and loop resistance value. Main focus is whether load side to-ground voltage appears abnormal drop or current exceeds preset safety threshold.
• Trigger Operating Conditions:
• Power State: Start switch placed at ON Position. At this time vehicle low voltage power supply system is activated, control unit enters active