Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YNYT
Model Year Start: 2022 Model: Avalon HV Prod Date Range: [08/2021 -           ]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: U041881; Invalid Data Received from Brake System Control Module Invalid Serial Data Received; 2022 MY Avalon Avalon HV [08/2021 -        ]

DTC

U041881

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

DESCRIPTION

for HV Model:

  • The forward recognition camera receives signals from the skid control ECU (brake booster with master cylinder assembly) corresponding to the brake control status via the CAN communication line.
  • When a brake control system malfunction signal is received from the skid control ECU (brake booster with master cylinder assembly), the forward recognition camera outputs U041881.

for Gasoline Model:

  • The forward recognition camera receives signals from the skid control ECU (brake actuator assembly) corresponding to the brake control status via the CAN communication line.
  • When a brake control system malfunction signal is received from the skid control ECU (brake actuator assembly), the forward recognition camera outputs U041881.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U041881

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

for HV Model:

  • Once 3 seconds elapse after turning the ignition switch to ON, the forward recognition camera receives a brake control system malfunction signal from the skid control ECU (brake booster with master cylinder assembly) for approximately 1 second or more.

for Gasoline Model:

  • Once 3 seconds elapse after turning the ignition switch to ON, the forward recognition camera receives a brake control system malfunction signal from the skid control ECU (brake actuator assembly) for approximately 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. As a result, a DTC may be stored.
  • When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

    HINT:

    Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

    One Time Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

    Driving Adjustment: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for HV Model

A

for Gasoline Model

B
B

GO TO STEP 3

A

2.

CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM

(a) Check the DTCs.

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

OK:

Electronically controlled brake system DTCs are not output.

HINT:

If U041881 is output in the pre-collision system, electronically controlled brake system DTCs may also have been output. Check the electronically controlled brake system first.

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

3.

CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM

(a) Check the DTCs.

Chassis > Brake/EPB > Trouble Codes

OK:

Electronically controlled brake system DTCs are not output.

HINT:

If U041881 is output in the pre-collision system, electronically controlled brake system DTCs may also have been output. Check the electronically controlled brake system first.

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM