DTC C1A72: Communication Error from FCM to Driving Support ECU [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
5. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Chassis > LKA/LDA > Clear DTCs 

6. 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 is turned ON and wait 7 seconds or more.
7. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

B 

USE SIMULATION METHOD TO CHECK:  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - 08/2016]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  ,  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

Result: 

A 

See step  2

1. Replace the forward recognition camera.

   Refer to REMOVAL [10/2015 - ]

2. Adjust the forward recognition camera.

   Refer to ADJUSTMENT [10/2015 - ]

Result: 

NEXT 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
5. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Chassis > LKA/LDA > Clear DTCs 

6. 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 is turned ON and wait 7 seconds or more.
7. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Chassis > LKA/LDA > Trouble Codes 

   Result

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

Result: 

A 

REPLACE DRIVING SUPPORT ECU ASSEMBLY:  REMOVAL [10/2015 - ] 

Result: 

B 

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)