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 ECU sub-assembly LH IG power source circuit. The headlight ECU sub-assembly LH stores DTC B242E.

DTC Code DTC Detection Condition Trouble Area
B242E Open in the headlight ECU sub-assembly LH IG power source circuit

  • Headlight ECU sub-assembly LH

  • Harness or connector

WIRING DIAGRAM

B002BWLE16
*a from LH-IG1 RLY1 Relay
*b Headlight ECU Sub-assembly LH

CAUTION / NOTICE / HINT

Note


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

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

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Turn the power switch on (IG).

    2. Check for DTCs Click here.

      OK
      DTC B242E is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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


    1. B002BQZE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight ECU Sub-assembly LH)

      Disconnect the 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
      B16-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B16-12 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR