DTC U0129: Lost Communication with Brake System Control Module [01/2019 - 11/2022]: Procedure

1. Clear the DTCs.

   Powertrain > Engine and ECT > Clear DTCs 

   HINT: 

   Write down any currently output DTCs before clearing them.

2. Start the engine and drive the vehicle at a low speed.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

   Powertrain > Engine and ECT > Trouble Codes 

5. Read the DTCs using the Techstream.

   Result

   Result	Proceed to
   DTC U0129 is not output	A
   DTC U0129 is output	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [01/2019 - 11/2022] 

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  DIAGNOSIS SYSTEM [01/2019 - 03/2019]  , or refer to  DIAGNOSIS SYSTEM [03/2019 - 09/2019]  , or refer to  DIAGNOSIS SYSTEM [09/2019 - 04/2020]  , or refer to  DIAGNOSIS SYSTEM [04/2020 - 09/2022]  , or refer to  DIAGNOSIS SYSTEM [09/2022 - 11/2022]