Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014W7M
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 10/2020]
Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM (w/ Steering Control): C1A71; Power Steering Control Torque; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

DTC

C1A71

Power Steering Control Torque

DESCRIPTION

If the power steering ECU (rack and pinion power steering gear assembly) detects an abnormality in the steering torque requested by the forward recognition camera, the power steering ECU (rack and pinion power steering gear assembly) sends a malfunction signal to the forward recognition camera, and DTC C1A71 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A71

Power Steering Control Torque

After the power switch is turned on (IG) for 3 seconds or more, a malfunction signal from the power steering ECU (rack and pinion power steering gear assembly) is detected by the forward recognition camera 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:

Lane departure alert system DTC C1A71 may be stored due to a malfunction in the power steering system. Therefore it is necessary to check for and troubleshoot power steering system DTCs 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 8 seconds or more.

(c) Check for DTCs.

Chassis > LKA/LDA > Trouble Codes

Result

Proceed to

DTC C1A71 is not output

A

DTC C1A71 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