Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014W7O
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 10/2020]
Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM (w/ Steering Control): C1AA1; FCM Destination Information Unmatched; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

DTC

C1AA1

FCM Destination Information Unmatched

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store vehicle information received from the main body ECU (multiplex network body ECU) and hybrid vehicle control ECU assembly. If the vehicle information stored in the forward recognition camera is different from that stored in the main body ECU (multiplex network body ECU) or hybrid vehicle control ECU assembly, DTC C1AA1 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA1

FCM Destination Information Unmatched

After the power switch is turned on (IG) for 3 seconds or more, vehicle information stored in the forward recognition camera and that received from the main body ECU (multiplex network body ECU) or hybrid vehicle control ECU assembly do not match for 5 seconds or more.
  • CAN communication system
  • Forward recognition camera
  • Main body ECU (Multiplex network body ECU)
  • Hybrid vehicle control ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here 2018 - 2019 MY Camry HV [07/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2020 - 2022 MY Camry HV [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

  • 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)

HINT:

This DTC is stored when the vehicle information stored in the forward recognition camera and that stored in the main body ECU (multiplex network body ECU) or hybrid vehicle control ECU assembly do not match. If the forward recognition camera, main body ECU (multiplex network body ECU) or hybrid vehicle control ECU assembly has been replaced, check if a forward recognition camera, main body ECU (multiplex network body ECU) or hybrid vehicle control ECU assembly from another vehicle was used.

PROCEDURE

1.

CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)

HINT:

When DTC C1AA1 is stored, DTC C1AAC may be stored at the same time.

(a) Check for DTCs.

Chassis > LKA/LDA > Trouble Codes

Result

Proceed to

DTC C1AAC is not output

A

DTC C1AAC is output

B
B

GO TO DTC CHART (C1AAC)

A

2.

CHECK FOR DTCs (CAN COMMUNICATION DTC OUTPUT)

HINT:

The forward recognition camera communicates with the main body ECU (multiplex network body ECU) via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

(a) Check for DTCs.

Chassis > LKA/LDA > Trouble Codes

Result

Proceed to

DTC U0142 is not output

A

DTC U0142 is output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

3.

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 C1AA1 is not output

A

DTC C1AA1 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

4.

REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; CRUISE CONTROL: FRONT CAMERA: REMOVAL

(b) Perform forward recognition camera adjustment.

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

NEXT

5.

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 C1AA1 is not output

A

DTC C1AA1 is output

B
A

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)
B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)