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PARKING SUPPORT BRAKE SYSTEM, Diagnostic DTC:C164B

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

The electronically controlled brake system receives parking support brake 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 assembly 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 assembly and clearance warning ECU assembly is detected

  • Clearance warning ECU assembly

  • Electronically controlled brake system
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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.

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

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PROCEDURE


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    CHECK DTC OUTPUT


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

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      Tip:

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


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


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

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


    3. Recheck for DTCs.

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


      Tip:

      • If DTC C164B is not output after clearing the DTCs, an intermittent communication error between the clearance warning ECU assembly and skid control ECU assembly 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.

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

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    CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


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

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      1. Chassis > ABS/VSC/TRC > Trouble Codes


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

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    REPLACE CLEARANCE WARNING ECU ASSEMBLY


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

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      Result
      Proceed to
      NEXT

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    CHECK DTC OUTPUT


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

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


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

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


    3. Recheck for DTCs.

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      1. 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 SKID CONTROL ECU ASSEMBLY for LHD:Click here

      REPLACE SKID CONTROL ECU ASSEMBLY for RHD:Click here

    • B

      END (CLEARANCE WARNING ECU ASSEMBLY DEFECTIVE)