DTC U023A: Lost Communication with Front Camera Module [02/2017 - 08/2020]: Procedure

HINT: 

When the forward recognition camera system outputs DTC U023A, the power steering system may also output DTC U023A. If DTC U023A is output, perform diagnosis for the power steering system first.

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [02/2017 - 10/2017] , or refer to DTC CHECK / CLEAR [10/2017 - 12/2021]

   Chassis > EMPS > Trouble Codes 

   Result

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

Result: 

B 

GO TO POWER STEERING SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - ] 

Result: 

A 

See step  2

1. Clear the DTCs.

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

   Chassis > Front Recognition Camera > Clear DTCs 

2. Perform the following procedure.

   HINT: 

   If the following procedure is not performed, the previously output DTC cannot be detected.

   1. Turn the ignition switch to ON and wait 8 seconds or more.
3. Check for DTCs.

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

   Chassis > Front Recognition Camera > Trouble Codes 

   Result

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

Result: 

A 

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: 

B 

See step  3

1. Replace the forward recognition camera.

   Refer to REMOVAL [02/2017 - 08/2020]

2. Perform Forward Recognition Camera Learning.

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

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

   Chassis > Front Recognition Camera > Clear DTCs 

2. Perform the following procedure.

   HINT: 

   If the following procedure is not performed, the previously output DTC cannot be detected.

   1. Turn the ignition switch to ON and wait 8 seconds or more.
3. Check for DTCs.

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

   Chassis > Front Recognition Camera > Trouble Codes 

   Result

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

Result: 

A 

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

Result: 

B 

REPLACE POWER STEERING ECU ASSEMBLY. Refer to  REMOVAL [02/2017 - 08/2020]