LIGHTING SYSTEM, Diagnostic DTC:B242E

DTC Code DTC Name
B242E Open in IG Circuit

DESCRIPTION

This DTC is stored when a malfunction occurs in the No. 1 headlight ECU sub-assembly LH IG power source circuit. The No. 1 headlight ECU sub-assembly LH stores DTC B242E.

DTC No. Detection Item DTC Detection Condition Trouble Area
B242E Open in IG Circuit Open in the No. 1 headlight ECU sub-assembly LH IG power source circuit

  • No. 1 headlight ECU sub-assembly LH

  • Harness or connector

WIRING DIAGRAM

A0020QBE27
*a from IG1 NO. 3 Relay
*b ECU-IG1 NO. 2
*c No. 1 Headlight ECU Sub-assembly LH

CAUTION / NOTICE / HINT

Note


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

  • If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

    Click here

PROCEDURE


  1. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > HL AutoLeveling > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

    5. Check for DTCs.


      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

  3. INSPECT NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH (IG TERMINAL VOLTAGE)

    B003YIRC30
    *a

    Component without harness connected

    (No. 1 Headlight ECU Sub-assembly LH)

    1. Disconnect the W1 No. 1 headlight ECU sub-assembly LH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W1-4 (IG) - Body ground Power switch off Below 1 V
      W1-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W1-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR