DTC C164B: Communication Error From Clearance Sonar ECU to VSC [06/2018 - 09/2022]: Procedure

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CHECK DTC OUTPUT

Using the Techstream, check for DTCs according to the prompts on the screen.
HINT:

After turning the engine switch from off to on (IG), wait 4 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes
Clear the DTCs according to the screen on the Techstream.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

Recheck for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

HINT:

If DTC C164B is not output after clearing the DTCs, an intermittent communication error between the clearance warning ECU assembly and skid control ECU is suspected.
If DTC C164B is output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result

Result	Proceed to
DTC C164B is output	A
DTC C164B is not output	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

See step 2

CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

Using the Techstream, check for DTCs according to the prompts on the screen.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

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

Result:

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

See step 3

REPLACE CLEARANCE WARNING ECU ASSEMBLY

Replace the clearance warning ECU assembly with a new or known good one.

Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022]

Result

Proceed to
NEXT

Result:

See step 4

CHECK DTC OUTPUT

Using the Techstream, check for DTCs according to the prompts on the screen.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes
Clear the DTCs according to the screen on the Techstream.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

Recheck for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Result	Proceed to
DTC C164B is output	A
DTC C164B is not output	B

Result:

REPLACE SKID CONTROL ECU. Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022]

Result:

END (CLEARANCE WARNING ECU ASSEMBLY DEFECTIVE)