DTC C1A73: Driving Support ECU Receive Data Malfunction [04/2018 - 08/2021]: Procedure

HINT: 

The driving support ECU communicates with other ECUs via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

1. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   DTC U0100, U0125, U0126, U0129, U0155, U0235, U023A, U1002 and U1104 are not output	A
   DTC U0100, U0125, U0126, U0129, U0155, U0235, U023A, U1002 or U1104 are output	B

Result: 

B 

GO TO PRE-COLLISION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - 08/2021] 

Result: 

A 

See step  2

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 C1A73 is not output	A
   DTC C1A73 is output	B

Result: 

A 

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

Result: 

B 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  COMPONENTS [04/2018 - 08/2021]