Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2023 Acura MDX BaseFACTORY OEM SERVICE PROCEDURE
Front Passenger's Power Seat Control Unit
| DTC | Description |
|---|---|
| DTC Troubleshooting: B1C02 | Front Passenger's Power Seat Control Unit Internal (EEPROM) Error |
| DTC Troubleshooting: B1C13 | Front Passenger's Lumbar Support Motor A Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C14 | Front Passenger's Lumbar Support Motor B Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C16 | Front Passenger's Left Bolster Motor Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's 4 Direction Horizontal Switch Failure |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's 4 Direction Vertical Switch Failure |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's Toggle Switch Failure |
| DTC Troubleshooting: B1C25 | Front Passenger's Slide Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C26 | Front Passenger's Front Height Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C27 | Front Passenger's Rear Height Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C28 | Front Passenger's Recline Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C37 | Front Passenger's Memory Position Calling Timeout |
| DTC Troubleshooting: B1C38 | Front Passenger's Right Bolster Motor Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C39 | Front Passenger's Thigh Support Motor Pulse Error (No change in pulse) |
| DTC Troubleshooting: B1C43 | Front Passenger's Power Seat Control Unit LOCAL communication error |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's Power Seat Slide Switch Circuit Malfunction |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's Power Seat Recline Switch Circuit Malfunction |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's Power Seat Front Up-Down Switch Circuit Malfunction |
| DTC Troubleshooting: B1C17, B1C18, B1C19, B1C44, B1C45, B1C46, B1C47 | Front Passenger's Power Seat Rear Up-Down Switch Circuit Malfunction |
| DTC Troubleshooting: B1C4A | Front Passenger's Massage Seat Control Unit error |
| DTC Troubleshooting: B1C4B | Front Passenger's Massage Seat Control Unit internal (EEPROM) error |
| DTC Troubleshooting: B1C4C | Front Passenger's Massage Seat Pump Failure |
| DTC Troubleshooting: U1280 (Driver's Power Seat Control Unit)DTC Troubleshooting: U1280 (Front Passenger's Power Seat Control Unit)DTC Troubleshooting: U1280 (Ventilated Seat Control Unit) | B-CAN Communication Bus Line Error (BUS-OFF) |
| DTC Troubleshooting: U1281 (Driver's Power Seat Control Unit) | Front Passenger's Power Seat Control Unit Lost Communication With MICU/BCM |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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