Seat Driver Rear Up Circuit Failure
The driver's rear seat up/down motor circuit has lost electrical connection or power, similar to a light switch that won't turn on because the wire is broken. The seat won't move upward when commanded by the control module.
The ECU monitors voltage and current flow to the rear seat up motor circuit during actuation commands. It detects open circuits, shorts, or excessive resistance that prevents proper motor operation. The module expects to see normal current draw when the up button is pressed.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor current draw | 2-8 amps during actuation | 0 amps or no response to command signal |
| Circuit voltage | 12-14V at motor connector | Below 10V or open circuit condition |
Code B1655 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, B1655 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.