LIGHTING SYSTEM, Diagnostic DTC:B242E

DTC Code DTC Name
B242E Open in IG Circuit

DESCRIPTION

This DTC is output when there is a problem in the power supply for the headlight ECU sub-assembly LH or headlight ECU sub-assembly RH.

The headlight ECU sub-assembly LH outputs DTC B242E.

DTC No. Detection Item DTC Detection Condition Trouble Area
B242E Open in IG Circuit IG circuit malfunction in the headlight ECU sub-assembly LH or headlight ECU sub-assembly RH.

  • Headlight ECU sub-assembly LH

  • Headlight ECU sub-assembly RH

  • Harness or connector

WIRING DIAGRAM

B006RDZE03

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

    Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTC B242E is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY - BATTERY AND BODY GROUND)


    1. B006L4FC25
      *A for Headlight ECU Sub-assembly LH
      *B for Headlight ECU Sub-assembly RH
      *a

      Front view of wire harness connector

      (to Headlight ECU Sub-assembly)

      Disconnect the headlight ECU sub-assembly connectors.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Headlight ECU Sub-assembly LH
      Tester Connection Switch Condition Specified Condition
      A28-4 (IG) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      Headlight ECU Sub-assembly RH
      Tester Connection Switch Condition Specified Condition
      A29-4 (IG) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Headlight ECU Sub-assembly LH
      Tester Connection Condition Specified Condition
      A28-12 (GND) - Body ground Always Below 1 Ω
      Headlight ECU Sub-assembly RH
      Tester Connection Condition Specified Condition
      A29-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH


    1. Temporarily replace the headlight ECU sub-assembly RH with a new or normally functioning one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTC B242E is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT ECU SUB-ASSEMBLY RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here