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Home >> Lexus >> 2012 >> LS 460 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter & Gauge System (Diagnostic Codes & Symptom Tests) >> Meter/Gauge System >> Symptom Tests >> Meter Illumination is Always Dark >> Procedure

Meter Illumination is Always Dark: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check for the DTC. Refer to DTC CHECK/CLEAR .
      RESULT

      Result Proceed to
      DTC is not output A
      CAN communication system DTC is output B
      Lighting system DTC (B1244) is output C

    B → See step   5 

    C → See step   6 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (DIMMER SWITCH) 
    1. Operate the Techstream according to the display and select "Active Test".

      OK

      Meter illumination is dimmed when the dimmer switch is ON.

      MAIN BODY:

      Tester Display Test Part Control Range
      Dimmer signal Dimmer switch ON or OFF

      HINT: 

      Refer to the sensitivity setting in the customization table of the automatic light control system. Refer to CUSTOMIZE PARAMETERS .

    NG → See step   3 

    OK → See step   7 

  3. REPLACE NO. 1 METER ECU 
    1. Temporarily replace the No. 1 meter ECU with a new one. Refer to DISASSEMBLY .

    NEXT: Go to next step 

  4. CHECK NO. 1 METER ECU 
    1. Check that the operation of the No. 1 meter ECU returns to normal. Refer to OPERATION CHECK .

      OK

      Operation of combination meter returns to normal.

    NG → REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 

    OK → END (NO. 1 METER ECU IS DEFECTIVE) 

  5. Go to CAN COMMUNICATION SYSTEM. Refer to  PRECAUTION 
  6. Go to LIGHTING SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE TABLE 
  7. CHECK LIGHTING SETTING. Refer to  CUSTOMIZE PARAMETERS