DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [08/2018 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Transmission / Trouble Codes.

   Powertrain > Transmission > Trouble Codes 

5. Read the DTCs using the Techstream.

   Result

   Result	Proceed to
   Only DTC U0100-87 is output	A
   DTC U0100-87 and other DTCs are output	B

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2018 - 09/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2019 - 10/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2020 - ] 

Result: 

A 

See step  2

1. Replace the ECM.

   Refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - 08/2022] , or refer to REMOVAL [08/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM REGISTRATION. Refer to  REGISTRATION [06/2017 - ]