Steering Column. Dtc U0100/56 Lost Communication With Ecm / Pcm A

Steering. Lexus Gs430, Gs300. Uzs190 Grs190

Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190

DTC U0100/56 Lost Communication with ECM / PCM "A"

DESCRIPTION

The steering control ECU receives signals from the ECM (engine ECU) via CAN communication.
If the steering control ECU detects an error in reception, it will output this DTC.

DTC No.	DTC Detecting Condition	Trouble Area
U0100/56	The steering control ECU detects an error in reception (from ECM) in CAN communication.	CAN communication system ECM

WIRING DIAGRAM

Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System.
Dtc
U0100/56 Lost Communication With Ecm / Pcm A

INSPECTION PROCEDURE

1.CHECK DTC

Check for DTCs in the CAN communication system (Click here).

Result:

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

REPAIR CIRCUIT INDICATED BY DTC OUTPUT

REPLACE ECM

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