B1CE413 - B1CE413 Right Outside Mirror Folding Motor Driver Circuit Open Circuit

B1CE413 Right Side Exterior Rearview Mirror Folding Motor Drive Circuit Open Circuit Fault

Fault Depth Definition

B1CE413 fault code is defined as "Right Side Exterior Rearview Mirror Folding Motor Drive Circuit Open Circuit Fault", in the vehicle electronic electrical architecture, this code explicitly indicates an abnormality in Controller integrity monitoring of actuator loop. This fault does not refer solely to physical wire break but encompasses states where signal path, load circuit or connection node electrical impedance exceeds preset thresholds. As interaction data between body domain controller and rearview system, this fault code reflects drive circuit failed to establish effective current transmission path, causing control unit unable to confirm motor real-time physical position and rotational speed status via expected feedback signals (e.g., Hall signals or current sensing). From logical perspective, this means actuator response received by control strategy fails to meet preset load characteristics requirements, triggering system protective marking of open-circuit topology structure.

Common Fault Symptoms

After fault condition activated, user-perceivable vehicle operation feedback mainly includes:

• Function Loss: Right side exterior rearview mirror executing automatic or manual folding commands, mirror assembly shows no physical displacement response, remains locked state.
• Instrument Panel Notification: Instrument panel may show Body Control Module (BCM) functional status warning light indicating electrical anomaly in body system.
• Vehicle Infotainment Feedback: If vehicle central screen has rearview mirror status display or folding assist functions, system returns prompt information indicating no response to operation.

Core Fault Cause Analysis

Based on reverse analysis of fault code triggering logic, potential factors leading to B1CE413 determination are categorized into three core dimensions for technical classification:

• Hardware Component Level: Drive coil inside right side exterior rearview mirror folding adjustment motor burns out or opens circuit, or severe mechanical sticking causes solenoid fail to actuate, resulting in current loop physical interruption.
• Wiring and Connector Level: Power wiring harness connecting domain controller and motor has break point, is crushed damaged, or due to high-frequency vibration causing high-speed connector terminal poor contact/loose connection, forming high impedance open circuit state.
• Controller Level: Right side domain controller internal drive logic unit or current sampling circuit fails, unable to correctly output drive signals or detect loop voltage feedback, thus falsely reporting open circuit fault.

Technical Monitoring and Trigger Logic

Control system uses real-time closed-loop monitoring strategy for dynamic motor drive circuit evaluation, specific determination rules are as follows:

• Monitoring Target: Core monitoring objects are real-time sampling values of drive current (Drive Current) and system power supply voltage (Controller Voltage).
• Numerical Range Determination: Pre-condition for fault determination is controller end voltage stabilizes between $9V$~$16V$, and vehicle power switch in ON position. Under this window, system starts load monitoring on actuator motor.
• Trigger Condition Logic: When right side exterior rearview mirror folding motor receives activation work instruction, if drive current value of $0A$ (i.e., no current detected) is continuously collected, and state duration exceeds $3s$, controller determines as circuit open circuit fault. This logic aims to exclude instant signal interference, ensure fault determination accuracy, avoid false reports at startup moment.