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Home >> Toyota >> 2012 >> Prius Plug-in >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Plug-In) (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 if CAN communication DTCs are output. Refer to DIAGNOSIS SYSTEM .

      Result

      Result Proceed to
      CAN communication DTCs are not output. A
      CAN communication DTCs are output. B

    B → See step   4 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (ILLUMINATION RATE INFO) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Check the values by referring to the table below.
      MAIN BODY

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Illumination Rate Info Illumination rate information/0 ms. to 2162.65 ms. Value is output according to ambient light levels -

      Result

      Result Proceed to
      The output value changes according to the ambient light level. A
      The output value does not change according to the ambient light level. B

    B → See step   5 

    A: Go to next step 

  3. REPLACE NO. 3 METER CIRCUIT PLATE 
    1. Replace the No. 3 meter circuit plate with a new or a known good one. Refer to DISASSEMBLY .

      OK

      The operation of the combination meter assembly returns to normal.

    NG → See step   6 

    OK → END 

  4. GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  5. CHECK CUSTOMIZE PARAMETER SETTING (SENSITIVITY). Refer to  CUSTOMIZE PARAMETERS 
  6. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL