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 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 and headlight ECU sub-assembly RH

  • Headlight ECU sub-assembly RH

  • Harness or connector

WIRING DIAGRAM

B002J8NE07
*a from IG1 NO.1 Relay
*b ECU-IG NO.3
*c Headlight ECU Sub-assembly LH
*d Headlight ECU Sub-assembly RH

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here

      for Single Beam Headlight:


      Body Electrical > HL AutoLeveling > Clear DTCs

      for Triple Beam Headlight:


      Body Electrical > AFS > Clear DTCs

    2. Turn the power switch on (IG).

    3. Check for DTCs.

      Click here

      for Single Beam Headlight:


      Body Electrical > HL AutoLeveling > Trouble Codes

      for Triple Beam Headlight:


      Body Electrical > AFS > Trouble Codes
      OK
      DTC B242E output does not occur.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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


    1. B002HW2C07
      *a

      Front view of wire harness connector

      (to headlight Light Control ECU Sub-assembly RH)

      Disconnect the headlight light control ECU sub-assembly RH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A20-4 (IG) - Body ground Power switch off Below 1 V
      A20-4 (IG) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A20-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR