POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): U0100,U0129,U023A; Lost Communication with ECM / PCM "A"; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001C0XF
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 09/2019]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): U0100,U0129,U023A; Lost Communication with ECM / PCM "A"; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]

DTC

U0100

Lost Communication with ECM / PCM "A"

DTC

U0129

Lost Communication with Brake System Control Module

DTC

U023A

Lost Communication with Front Camera Module

DESCRIPTION

The power steering ECU with motor assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and forward recognition camera via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition	Note
U0100	Lost Communication with ECM / PCM "A"	Lost communication with ECM	CAN communication system ECM	EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates.	After normal confirmation	-
U0129	Lost Communication with Brake System Control Module	Lost communication with skid control ECU (Brake actuator assembly)	CAN communication system Skid control ECU (Brake actuator assembly)	EPS warning light: Comes on	After normal confirmation	-
U023A	Lost Communication with Front Camera Module	Lost communication with forward recognition camera	CAN communication system Forward recognition camera	EPS warning light: Does not come on	After normal confirmation	-

PROCEDURE

1.	GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here

END