Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014W7Z
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 10/2020]
Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM (w/ Steering Control): U023A; Lost Communication With Image Processing Module "A"; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

DTC

U023A

Lost Communication With Image Processing Module "A"

DESCRIPTION

When a communication error between the forward recognition camera and power steering ECU (rack and pinion power steering gear assembly) is detected, the forward recognition camera notifies other ECUs and DTC U023A is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U023A

Lost Communication With Image Processing Module "A"

After the power switch is turned on (IG) for 3 seconds or more, when the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication malfunction between the forward recognition camera and power steering ECU (rack and pinion power steering gear assembly) is detected for 5 seconds or more.
  • Power steering 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.
  • If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.

    Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

  • The lane departure alert system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK FOR DTCs (POWER STEERING SYSTEM)

HINT:

If DTC U023A is stored, the power steering system may be malfunctioning. Check for DTCs related to the power steering system first.

(a) Check for DTCs.

Chassis > EMPS > Trouble Codes

Result

Proceed to

Power steering system DTCs are not output

A

Power steering system DTCs are output

B
B

GO TO POWER STEERING SYSTEM

A

2.

CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)

(a) Clear the DTCs.

Chassis > LKA/LDA > Clear DTCs

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the power switch on (IG) and wait 3 seconds or more.
  2. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 5 seconds or more.

(c) Check for DTCs.

Chassis > LKA/LDA > Trouble Codes

Result

Proceed to

DTC U023A is not output

A

DTC U023A is output

B
A

USE SIMULATION METHOD TO CHECK 2018 MY Camry HV [07/2017 - 09/2018]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2019 MY Camry HV [09/2018 - 09/2019]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry HV [09/2019 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

B

REPLACE FORWARD RECOGNITION CAMERA