DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [11/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- CLEAR DTC AND PERFORM ROAD TEST
- Clear the DTCs.
Powertrain > Transmission > Clear DTCs
HINT:
Write down the currently output DTCs before clearing them.
- Start the engine and drive the vehicle at a low speed.
Result
Proceed to NEXT
Result:
NEXT
See step 2
- Clear the DTCs.
- CHECK DTC OUTPUT (DTC U0129-87)
- Read the DTCs using the GTS.
Powertrain > Transmission > Trouble Codes
Result
Result Proceed to U0129-87 is not output A U0129-87 is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]
Result:
B
GO TO CAN COMMUNICATION SYSTEM. Refer to DIAGNOSIS SYSTEM [11/2023 - ]
- Read the DTCs using the GTS.