B1CE113 - B1CE113 Left Outside Mirror Fold Motor Drive Circuit Open Circuit Fault

meaning is "Left Exterior Rearview Mirror Folding Motor Drive Circuit Open". This fault code is generated by the Left Domain Controller and recorded internally within the onboard diagnostic system. Interpreted from a system function logic perspective, this code signifies that upon attempting to execute an instruction, the control unit detects that the drive circuit leading to the left exterior rearview mirror folding motor does not exhibit an expected conductive path or electrical continuity. Specifically, the left exterior rearview mirror folding motor drive circuit open does not refer to a complete physical disconnection of the link, but rather indicates that the loop impedance is extremely high, preventing current from flowing normally and failing to form a closed loop. The generation of this fault code is based on the real-time status monitoring of the drive loop by the left domain controller, indicating an interruption in the signal integrity or power supply path between the control unit and the actuator (motor), causing the electromechanical feedback system to be unable to complete the predetermined folding action cycle.

Common Fault Symptoms

When B1CE113 is activated and stored within the vehicle electronic control unit, drivers or passengers operating related functions will observe the following specific phenomena:

• Left exterior rearview mirror folding function failure: This is the most direct perceptual manifestation; the system fails to respond to folding instructions, and the side mirror remains in its original position.
• No execution feedback for folding command: After a user sends a folding signal, there is no mechanical movement or sound from the left exterior rearview mirror, indicating that the motor did not receive effective drive current.
• Related system warning lights illuminate (depending on vehicle configuration): Some vehicles may display body stability system or electronic system related warning information on the dashboard when detecting this open circuit fault logic.

Core Fault Cause Analysis

For the DTC "Left Exterior Rearview Mirror Folding Motor Drive Circuit Open", the fundamental causes need to be investigated and defined from the following three technical dimensions:

• Hardware Component Level (Actuator End):
• Left exterior rearview mirror folding motor failure: The internal windings of the motor may occur an open circuit, rotor jamming or Hall sensor damage, causing the coil to be unable to form an effective path, thus being judged by the controller as a circuit open.
• Wiring and Physical Connection Level (Transmission Channel):
• Harness or connector fault: The wires connecting the left domain controller and the folding motor may experience broken leads, pin corrosion, loosening, or insulation layer damage leading to ground short circuits, causing physical interruption of the signal path.
• Control Logic Level (Decision End):
• Left Domain Controller failure: Internal drive modules (e.g., MOSFET tubes) within the controller are damaged or output stage open, preventing the provision of drive current to the motor, thus triggering an open circuit judgment.

Technical Monitoring & Trigger Logic

The onboard diagnostic system's determination of B1CE113 follows a strict sequence and operating condition monitoring logic; specific technical trigger mechanisms are as follows:

• Monitored Target Parameters:
• The system primarily monitors drive circuit signal integrity and load impedance. Following the issuance of an instruction, the controller reads pin voltage status or current feedback in real-time to confirm if the expected current path exists.
• Specific Condition Determination Criteria:
• Ignition Switch ON Position: The system enters high-sensitivity monitoring mode only when the ignition is switched on; at this time, the power supply system is activated.
• Operating Left Exterior Rearview Mirror Folding: When a user triggers a folding command via internal or external switches, the control unit immediately enters the drive logic test phase.
• Fault Determination Logic:
• Under the above operating conditions, if the controller detects that normal voltage level is not established in the drive loop, current is zero, or motor position feedback is not completed within the expected time window, the system will judge this as a circuit open. At this point, relevant parameters are recorded, fault code B1CE113 is formally stored internally within the control unit, dashboard warning lights (if applicable) illuminate to prompt maintenance intervention.

Cause Analysis For the DTC "Left Exterior Rearview Mirror Folding Motor Drive Circuit Open", the fundamental causes need to be investigated and defined from the following three technical dimensions:

• Hardware Component Level (Actuator End):
• Left exterior rearview mirror folding motor failure: The internal windings of the motor may occur an open circuit, rotor jamming or Hall sensor damage, causing the coil to be unable to form an effective path, thus being judged by the controller as a circuit open.
• Wiring and Physical Connection Level (Transmission Channel):
• Harness or connector fault: The wires connecting the left domain controller and the folding motor may experience broken leads, pin corrosion, loosening, or insulation layer damage leading to ground short circuits, causing physical interruption of the signal path.
• Control Logic Level (Decision End):
• Left Domain Controller failure: Internal drive modules (e.g., MOSFET tubes) within the controller are damaged or output stage open, preventing the provision of drive current to the motor, thus triggering an open circuit judgment.

Technical Monitoring & Trigger Logic

The onboard diagnostic system's determination of B1CE113 follows a strict sequence and operating condition monitoring logic; specific technical trigger mechanisms are as follows:

• Monitored Target Parameters:
• The system primarily monitors drive circuit signal integrity and load impedance. Following the issuance of an instruction, the controller reads pin voltage status or current feedback in real-time to confirm if the expected current path exists.
• Specific Condition Determination Criteria:
• Ignition Switch ON Position: The system enters high-sensitivity monitoring mode only when the ignition is switched on; at this time, the power supply system is activated.
• Operating Left Exterior Rearview Mirror Folding: When a user triggers a folding command via internal or external switches, the control unit immediately enters the drive logic test phase.
• Fault Determination Logic:
• Under the above operating conditions, if the controller detects that normal voltage level is not established in the drive loop, current is zero, or motor position feedback is not completed within the expected time window, the system will judge this as a circuit open. At this point, relevant parameters are recorded, fault code B1CE113 is formally stored internally within the control unit, dashboard warning lights (if applicable) illuminate to prompt maintenance intervention.