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LIGHTING SYSTEM, Diagnostic DTC:B2494, B2495

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DTC Code DTC Name
B2494 Left Cornering Light/Front Side Illuminate Light Malfunction
B2495 Right Cornering Light/Front Side Illuminate Light Malfunction
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DESCRIPTION

The headlight ECU sub-assembly supplies internally boosted voltage to the LED so that the current supplied to the LED is always maintained at a constant value.

These DTCs are also output when the headlight ECU sub-assembly detects malfunctions while monitoring the applied voltage.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note
B2494 Left Cornering Light/Front Side Illuminate Light Malfunction
  • Detection condition:

  • Power switch on (IG), cornering lights illuminated


  • Malfunction status:

  • LED (LED) malfunction

  • Open/short in LED (LEG) circuit


  • Malfunction duration:

  • 10 seconds or more

  • Headllight cornering LED unit LH

  • Headlight unit assembly LH

  • Headlight unit assembly LH

  • Headlight ECU sub-assembly LH

 Headlight ECU sub-assembly LH w/ Cornering Light
B2495 Right Cornering Light/Front Side Illuminate Light Malfunction
  • Detection condition:

  • Power switch on (IG), cornering lights illuminated


  • Malfunction status:

  • LED (LED) malfunction

  • Open/short in LED (LEG) circuit


  • Malfunction duration:

  • 10 seconds or more

  • Headllight cornering LED unit RH

  • Headlight unit assembly RH

  • Headlight unit assembly RH

  • Headlight ECU sub-assembly RH

 Headlight ECU sub-assembly RH w/ Cornering Light
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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.

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PROCEDURE


  1. Click here

    CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      1. Body Electrical > AFS > Clear DTCs



      1. Body Electrical > AFS (Sub) > Clear DTCs


    2. 10 seconds elapse after turning the power switch on (IG) and illuminating the cornering lights using the light control switch.

    3. Check for DTCs.

      Click here


      1. Body Electrical > AFS > Trouble Codes



      1. Body Electrical > AFS (Sub) > Trouble Codes


      OK
      DTC B2494 and B2495 are not output.
      Result
      Result Proceed to
      OK A
      NG (DTC B2494 is output) B
      NG (DTC B295A is output) C

  2. Click here

    CHECK HEADLIGHT UNIT ASSEMBLY LH


    1. Interchange the headlight unit assembly LH with RH and connect the connectors to them.

      Click here

    2. Clear the DTCs.

      Click here


      1. Body Electrical > AFS > Clear DTCs


    3. 10 seconds elapse after turning the power switch on (IG) and illuminating the cornering lights using the light control switch.

    4. Check for DTCs.

      Click here


      1. Body Electrical > AFS > Trouble Codes


      OK
      DTC B2494 is not output.
      Result
      Proceed to
      OK
      NG

  3. Click here

    INSPECT HEADLIGHT UNIT ASSEMBLY LH


    1. B004WMUC01
      *a

      Component without harness connected

      (Headlight ECU Sub-assembly LH)
      *b

      Component without harness connected

      (Headllight Cornering LED Unit LH)

      Remove the headllight cornering LED unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Wiring Color Condition Specified Condition
      B-5 - E-2 B-W Always Below 1 Ω
      B-6 - E-1 BR Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HEADLLIGHT CORNERING LED UNIT LHClick here

    • NG

      REPLACE HEADLIGHT HOUSING SUB-ASSEMBLY LH (WIRE HARNESS)Click here

  4. Click here

    CHECK HEADLIGHT UNIT ASSEMBLY RH


    1. Interchange the headlight unit assembly RH with LH and connect the connectors to them.

      Click here

    2. Clear the DTCs.

      Click here


      1. Body Electrical > AFS (Sub) > Clear DTCs


    3. 10 seconds elapse after turning the power switch on (IG) and illuminating the cornering lights using the light control switch.

    4. Check for DTCs.

      Click here


      1. Body Electrical > AFS (Sub) > Trouble Codes


      OK
      DTC B2495 is not output.
      Result
      Proceed to
      OK
      NG

  5. Click here

    INSPECT HEADLIGHT UNIT ASSEMBLY LH


    1. B004WMUC01
      *a

      Component without harness connected

      (Headlight ECU Sub-assembly LH)
      *b

      Component without harness connected

      (Headllight Cornering LED Unit LH)

      Remove the headllight cornering LED unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Wiring Color Condition Specified Condition
      B-5 - E-2 B-W Always Below 1 Ω
      B-6 - E-1 BR Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HEADLLIGHT CORNERING LED UNIT RHClick here

    • NG

      REPLACE HEADLIGHT HOUSING SUB-ASSEMBLY RH (WIRE HARNESS)Click here