INTELLIGENT CLEARANCE SONAR SYSTEM, Diagnostic DTC:C164B

DTC Code DTC Name
C164B Communication Error From Clearance Sonar ECU to VSC

DESCRIPTION

The electronically controlled brake system receives intelligent clearance sonar system information from the clearance warning ECU assembly via CAN communication. When it is determined that there is a communication error between the skid control ECU and clearance warning ECU assembly, DTC C164B is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C164B Communication Error From Clearance Sonar ECU to VSC A communication error between the skid control ECU and clearance warning ECU assembly is detected

  • Clearance warning ECU assembly

  • Electronically controlled brake system

  • Brake booster with master cylinder assembly

CAUTION / NOTICE / HINT

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

    Click here

PROCEDURE


  1. CHECK DTC OUTPUT


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

      Click here

      Tech Tips

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


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

    2. Clear the DTCs according to the screen on the GTS.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    3. Recheck for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

      Tech Tips


      • 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 the inspection again, even though the DTC was not output when rechecking for DTCs.

        Click here

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

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


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

      Click here


      Chassis > ABS/VSC/TRAC > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  3. REPLACE CLEARANCE WARNING ECU ASSEMBLY


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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT


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

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes

    2. Clear the DTCs according to the screen on the GTS.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    3. Recheck for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C164B is output A
      DTC C164B is not output B

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    END (CLEARANCE WARNING ECU ASSEMBLY DEFECTIVE)