Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001G4E8
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for HV Model): U041881; Invalid Data Received from Brake System Control Module Invalid Serial Data Received; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

U041881

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

DESCRIPTION

The skid control ECU (brake booster with master cylinder 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 booster with master cylinder 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 power switch is on (IG) for 3 seconds or more, the forward recognition camera receives electronically controlled brake system malfunction signal from the skid control ECU (brake booster with master cylinder 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 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

PROCEDURE

1.

CHECK FOR DTCs

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

Chassis > ABS/VSC/TRAC > 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
A

REPLACE FORWARD RECOGNITION CAMERA

B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM