Seat Driver Forward Switch Circuit Short To Battery
The driver's seat forward switch circuit is sending a constant maximum voltage signal to the ECU, like a stuck accelerator pedal that won't release. This prevents the seat adjuster from functioning properly because the ECU can't tell when the switch is actually being pressed.
The ECU monitors the voltage signal from the driver seat forward switch circuit. Normally, the signal toggles between ground (0V) and a reference voltage when the button is pressed. A short to battery keeps the signal constantly high, preventing the ECU from detecting button presses or releasing the seat motor.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Switch Voltage | 0V (off) to 5V (on) with transitions | Constant 12V+ (shorted to battery) |
| Circuit Resistance | Open circuit or ~100-500 ohms when activated | <10 ohms (direct short) |
Code B1719 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, B1719 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.