DTC C1AA1: FCM Destination Information Unmatched [04/2018 - 08/2021]: Procedure

HINT: 

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

1. Check for DTCs.

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

B 

GO TO DTC CHART (C1AAC). Refer to  DTC C1AAC: Vehicle Information Unmatched [04/2018 - 08/2021]  

Result: 

A 

See step  2

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.

1. Check for DTCs.

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ] 

Result: 

A 

See step  3

1. Clear the DTCs.

   Chassis > LKA/LDA > Clear DTCs 

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the system cannot detect the malfunction.

3. Check for DTCs.

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ] 

Result: 

B 

See step  4

1. Replace the forward recognition camera.

   Refer to REMOVAL [04/2018 - 08/2021]

2. Perform forward recognition camera adjustment.

   Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [04/2018 - 08/2021]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Clear the DTCs.

   Chassis > LKA/LDA > Clear DTCs 

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the system cannot detect the malfunction.

3. Check for DTCs.

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

A 

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  COMPONENTS [04/2018 - ]