DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [12/2019 - 10/2022]: Procedure

1. Read the DTCs using the GTS.

   Powertrain > Transmission > Trouble Codes 

   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 [12/2019 - 10/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022] 

Result: 

A 

See step  2

1. Replace the ECM.

   Refer to COMPONENTS [12/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM REGISTRATION. Refer to  REGISTRATION [12/2019 - 10/2022]