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 headlight control computer assembly LH IG power source circuit. The headlight control computer assembly LH stores DTC B242E.

DTC No. Detection Item DTC Detection Condition Trouble Area
B242E Open in IG Circuit Open in the headlight control computer assembly LH IG power source circuit

  • Headlight control computer assembly LH

  • Harness or connector

WIRING DIAGRAM

B002D08E02
*a from LH-IG1 RLY1 Relay
*b Headlight Control Computer Assembly LH

CAUTION / NOTICE / HINT

Note


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

  • If the headlight control computer assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight light control ECU sub-assembly LH.

    Click here

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > AFS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Check for DTCs.

      Click here


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

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT CONTROL COMPUTER ASSEMBLY RH - POWER SOURCE AND BODY GROUND)


    1. Disconnect the A29 headlight control computer assembly LH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A29-4 (IG) - Body ground Engine switch off Below 1 V
      A29-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A29-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR