B1632 – Mirror Driver Left Circuit Open

The ODBII code B1632 indicates that there is an open circuit in the left mirror driver, which means the electrical connection to the left side mirror is interrupted or not functioning properly.

The severity of ODBII code B1632 is generally considered moderate.

Common Causes For: B1631 Mirror Driver Left Circuit Failure

• Faulty left mirror assembly
• Damaged wiring or connectors
• Open circuit in the mirror driver circuit
• Failed mirror control switch
• Corroded or loose connections
• Malfunctioning body control module (BCM)

Common misdiagnosis for B1632 Mirror Driver Left Circuit Open

• Faulty left side mirror assembly
• Wiring harness issues
• Malfunctioning body control module (BCM)
• Defective mirror switch
• Short circuit in the mirror circuit
• Grounding issues
• Incorrectly installed or damaged mirror connector
• Faulty power supply to the mirror system

Common Troubleshooting Steps

The OBD-II code B1632 indicates a problem with the left mirror driver circuit, specifically that it is open, meaning there is a break in the circuit preventing the mirror from functioning properly. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Visual Inspection:
• Check the wiring harness and connectors leading to the left mirror for any visible damage, corrosion, or loose connections.
• Inspect the mirror itself for any physical damage.
• Check Fuses:
• Locate the fuse box and check for any blown fuses related to the mirror or power windows. Replace any blown fuses and see if the issue persists.
• Test the Mirror Switch:
• Use a multimeter to test the mirror control switch for continuity. If the switch is faulty, it may need to be replaced.
• Inspect the Mirror Motor:
• If possible, test the mirror motor directly by applying power to it. If the motor does not operate, it may be defective and require replacement.
• Check for Ground Issues:
• Ensure that the ground connection for the mirror circuit is secure and free of corrosion. A poor ground can cause an open circuit.
• Use a Multimeter:
• Measure the voltage at the mirror connector while operating the mirror switch. If there is no voltage, trace the wiring back to the switch and check for continuity.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Inspect the Body Control Module (BCM):
• If all other components check out, the issue may lie within the BCM. Check for any software updates or faults in the module.
• Wiring Diagram Reference:
• Consult the vehicle’s wiring diagram to trace the circuit and identify any other components that may be involved in the left mirror operation.
• Professional Diagnosis:
• If the issue remains unresolved after these steps, consider seeking help from a professional mechanic or automotive technician who can perform more advanced diagnostics. By following these steps, you should be able to identify the cause of the B1632 code and take appropriate action to resolve the issue.