DTC U0100: Lost Communication with ECM / PCM "A" [12/2012 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0100)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes

Check if DTCs are output.

Result

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

Result:

A

REPLACE ECM. Refer to REMOVAL [12/2012 - ]

Result:

B

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2012 - 11/2013] or DIAGNOSTIC TROUBLE CODE CHART [11/2013 - 08/2014] or DIAGNOSTIC TROUBLE CODE CHART [08/2014 - 10/2015] or DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 08/2016] or DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 08/2017] or DIAGNOSTIC TROUBLE CODE CHART [08/2017 - ]