LIGHTING SYSTEM(for LED Headlight), 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 DTC Output from Note
B242E Open in IG Circuit Open in the No. 1 headlight ECU sub-assembly LH IG power source circuit

  • Harness or connector

  • No. 1 headlight ECU sub-assembly LH

 No. 1 headlight ECU sub-assembly LH -

WIRING DIAGRAM

B001ED7E02
*a from IG NO.4 Relay
*b ECU-IG NO.3
*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. CHECK FOR DTC


    1. Clear the DTCs.

      Click here

    2. Turn the ignition switch to ON.

    3. Check for DTCs.

      Click here

      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 (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - BATTERY AND BODY GROUND)


    1. B001EKKC96
      *a

      Front view of wire harness connector

      (to No. 1 Headlight ECU Sub-assembly LH)

      Disconnect the 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 Switch Condition Specified Condition
      A102-4 (IG) - Body ground Ignition switch ON 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A102-12 (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