Lost Communication with Seat Control Module C
2003-2009 Toyota 4Runner 4.7L V8
Description
Cannot communicate with the rear seat control module on vehicles with powered rear seats.
Symptoms
- Rear power seat not adjustable
- Rear seat recline not working
- Rear heated seats from module offline
Common Causes
- Rear seat module failure
- Wiring issue
- Power loss
- Fuse blown
Diagnostic Steps
- Check rear seat module fuse
- Test power and ground
- Inspect wiring to rear seats
- Check module connector
Repair Notes
Check rear seat module fuse and connector access behind rear seat.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0005High Speed CAN Communication Bus (+) High
U0149 on Other Vehicles
Toyota 4Runner
2003-2009 4.0L V6
Toyota 4Runner
2010-2024 4.0L V6
Toyota 86
2017-2020 2.0L H4
Toyota Alphard
2023-2025 2.4L I4 Turbo T24A-FTS
Toyota Alphard
2023-2025 2.5L I4 Hybrid A25A-FXS
Toyota Altezza
1998-2005 2.0L I4 3S-GE BEAMS
Toyota Altezza
1998-2005 2.0L I6 1G-FE
Toyota Aqua
2011-2021 1.5L I4 Hybrid 1NZ-FXE
Common Questions
What does code U0149 mean on a 2003-2009 Toyota 4Runner?
U0149 stands for "Lost Communication with Seat Control Module C". Cannot communicate with the rear seat control module on vehicles with powered rear seats.
What are the symptoms of U0149 on a Toyota 4Runner?
Common symptoms of U0149 include: Rear power seat not adjustable, Rear seat recline not working, Rear heated seats from module offline.
What causes U0149 on a 2003-2009 Toyota 4Runner?
Common causes of U0149 include: Rear seat module failure, Wiring issue, Power loss, Fuse blown.