INTELLIGENT CLEARANCE SONAR SYSTEM, Diagnostic DTC:C1A4B

DTC Code DTC Name
C1A4B Stop Light Relay Circuit

DESCRIPTION

When a stop light relay circuit malfunction signal sent from the vehicle stability control system is detected by the clearance warning ECU assembly, DTC C1A4B is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A4B Stop Light Relay Circuit Stop light relay circuit malfunction Vehicle stability control system

CAUTION / NOTICE / HINT

Note


  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) 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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  • When DTC C1A4B is stored, there may be a malfunction in the lighting system. Inspect the lighting system before performing the following procedure.

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PROCEDURE


  1. CHECK FOR DTC


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

      Tech Tips

      After turning the engine 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.


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

    3. Recheck for DTCs.


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

      Tech Tips


      • DTC C1A4B is stored when a malfunction signal sent from the vehicle stability control system is detected.

      • If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1A4B will not be output again.

      • If DTC C1A4B 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 C1A4B is output A
      DTC C1A4B is not output B

    A

    GO TO PRE-COLLISION SYSTEM Click here

    B

    USE SIMULATION METHOD TO CHECK Click here