Mirror Driver Left Circuit Open
The left side mirror's electric motor circuit has lost electrical connection, like a broken wire in a lamp cord. The car's computer can't send power to adjust the mirror because the circuit is open.
The ECU monitors voltage and current flow to the left mirror motor circuit. It expects to detect proper circuit continuity and motor resistance when adjustment commands are sent. If no current flows or resistance is infinite, an open circuit fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor Circuit Resistance | 4-8 ohms at motor | Open circuit (infinite resistance) |
| Circuit Voltage Draw | 2-5 amps when active | 0 amps or no response |
Code B1632 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B1632 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.