DTC C1A72: Communication Error from FCM to Driving Support ECU [09/2017 - 05/2019]: Procedure

1. Check for DTCs are output.

   Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   HINT: 

   Confirm that there is no communication error between the forward recognition camera and driving support ECU.

   Result

   Result	Proceed to
   DTC U023A is not output	A
   DTC U023A is output	B

Result: 

B 

GO TO PRE-COLLISION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2017 - 05/2019] 

Result: 

A 

See step  2

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

   Chassis > LKA/LDA > Clear DTCs 

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

   HINT: 

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

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

   Chassis > LKA/LDA > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1A72 is not output	A
   DTC C1A72 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019] 

Result: 

B 

See step  3

1. Replace the forward recognition camera.

   Refer to REMOVAL [09/2017 - 05/2019]

2. Perform Forward Recognition Camera Learning.

   Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [09/2017 - 05/2019]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

   Chassis > LKA/LDA > Clear DTCs 

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

   HINT: 

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

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

   Chassis > LKA/LDA > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1A72 is not output	A
   DTC C1A72 is output	B

Result: 

A 

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

Result: 

B 

REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  REMOVAL [09/2017 - 05/2019]