PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): U041881; Invalid Data Received from Brake System Control Module Invalid Serial Data Received; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001HBMQ
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): U041881; Invalid Data Received from Brake System Control Module Invalid Serial Data Received; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

DTC

U041881

Invalid Data Received from Brake System Control Module Invalid Serial Data Received

DESCRIPTION

The skid control ECU (brake actuator assembly) sends signals indicating the status of the electronically controlled brake system to the forward recognition camera via CAN communication.

If the forward recognition camera receives an electronically controlled brake system malfunction signal from the skid control ECU (brake actuator assembly), it will store this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U041881	Invalid Data Received from Brake System Control Module Invalid Serial Data Received	When the ignition switch is ON for 3 seconds or more, the forward recognition camera receives electronically controlled brake system malfunction signal from the skid control ECU (brake actuator assembly) for 1 second or more.	Electronically controlled brake system Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
If the forward recognition camera has been replaced with a new one, forward recognition camera adjustment must be performed.
HINT:

Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.

One Time Recognition: Click here

Sequential Recognition: Click here

PROCEDURE

1.	CHECK FOR DTCs

(a) Using the Techstream, check for electronically controlled brake system DTCs.

Chassis > Brake > Trouble Codes

HINT:

If DTC U041881 is output by the pre-collision system, perform troubleshooting for the electronically controlled brake system.

Result	Proceed to
DTCs are not output	A
DTCs are output	B

REPLACE FORWARD RECOGNITION CAMERA

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

w/ Electric Parking Brake System: Click here

w/o Electric Parking Brake System: Click here