DTC C1AA1: FCM Destination Information Unmatched [02/2017 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota C-HR, 2019 Toyota C-HR, and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

HINT:

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

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC C1AAC is not output	A
DTC C1AAC is output	B

Result:

GO TO DTC CHART (C1AAC). Refer to DTC C1AAC: Vehicle Information Unmatched [02/2017 - 08/2020]

Result:

See step 2

CHECK DTC OUTPUT (CAN COMMUNICATION DTC OUTPUT)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC U0142 is not output	A
DTC U0142 is output	B

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 05/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]

Result:

See step 3

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 7 seconds or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC C1AA1 is output	A
DTC C1AA1 is not output	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 10/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 05/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]

Result:

See step 4

REPLACE FORWARD RECOGNITION CAMERA

Replace the forward recognition camera.
Refer to REMOVAL [02/2017 - 08/2020]

Adjust the forward recognition camera.

Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [02/2017 - 08/2020]

Result

Proceed to
NEXT

Result:

See step 5

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure that the DTC detection conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 7 seconds or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

Result	Proceed to
DTC C1AA1 is output	A
DTC C1AA1 is not output	B

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [02/2017 - 10/2017] , or refer to REMOVAL [10/2017 - 08/2020]

Result:

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)