Memory 2 Switch Circuit Open
The vehicle's memory seat switch circuit has an open connection, meaning the electrical circuit can't complete its path. It's like a light switch that's broken and can't turn the circuit on or off properly.
The ECU monitors voltage levels on the memory seat switch circuit to detect button presses and signal seat motor commands. An open circuit means no voltage signal is reaching the ECU, preventing it from recognizing switch activation. The ECU expects a closed loop with proper voltage transitions when the switch is operated.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Switch Circuit Voltage | 5V (logic high) or 0V (logic low) with clean transitions | No voltage change or stuck at one level indicating open circuit |
| Circuit Resistance | Less than 10 ohms when closed | Infinite resistance or open circuit detected |
Code B1536 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, B1536 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.