Memory 1 Switch Circuit Open
The vehicle's memory seat switch circuit has an open connection, meaning electrical continuity is broken—like a light switch that's permanently stuck in the off position. The ECU cannot detect or communicate with the memory seat function.
The ECU monitors voltage across the memory seat switch circuit for a valid signal when the switch is activated. It expects to detect a voltage change indicating switch closure; an open circuit prevents any signal from reaching the module. If no voltage transition occurs within the expected timeframe, the fault is logged.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Switch Circuit Voltage | 5V (active) / 0V (inactive) with smooth transitions | No voltage change or stuck at one level; open circuit detected |
| Signal Response Time | Switch responds within 200ms of activation | No response or timeout; circuit continuity lost |
Code B1532 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, B1532 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.