Seat Switch Circuit Open (B1544)
The B1544 code indicates an open circuit in the seat direction switch assembly, typically found in Toyota and Lexus vehicles. This switch controls seat movement in one or more directions (forward/back, recline, height). The seat control module detects a break in the switch circuit, preventing proper communication and operation of the power seat adjustment system. The code sets when the voltage or resistance in the switch circuit is outside expected parameters for a specified period.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged or worn seat direction switch
- Open or corroded wiring between the switch and seat control module
- Loose, disconnected, or bent/corroded pins in the switch connector
- Faulty seat control module (ECU)
- Blown fuse in the seat power circuit
- Poor ground connection in the switch circuit
3. Symptoms You Will Notice
- Power seat does not move in one or more directions
- Seat moves intermittently or only in some directions
4. Step-by-Step Diagnosis
Check for blown fuses in the seat power circuit and replace if necessary.
Inspect the seat direction switch and its connector for damage, corrosion, or loose pins.
Test the switch for continuity in each position using a multimeter.
Check wiring between the switch and seat control module for opens or shorts.
Verify proper ground at the switch and module.
If all else is good, test or replace the seat control module.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive, but you may not be able to adjust the seat electrically. Manual adjustment may still be possible depending on the vehicle.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on the cause. A switch replacement is usually $50-$200, while a control module can be $200-$500 plus labor.