LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2009 >> Avalon XLS >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter >> Meter / Gauge System >> Symptom Tests >> Operating Light Control Rheostat does not Change Light Brightness >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF TECHSTREAM (RHEOSTAT VALUE) 
    1. Connect Techstream to the DLC3.
    2. Ignition switch on (IG).
    3. Turn the tester on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Check the values by referring to the table below.

      Combination Meter: 

      DATA LIST - COMBINATION METER

      Tester Display Measurement Item/Range Normal Condition
      Rheostat value Light control rheostat/Min.: 0%, Max.: 100% Light control rheostat switch is Dark (0%) → Bright (100%)

      OK: 

      The value displayed on the tester gradually changes as the actual rheostat operation. 

    NG:  Go to step  5

    OK: Go to next step 

  2. CHECK ILLUMINATION 

    OK 

    RESULT REFERENCE

    Result Proceed to
    All illumination does not change. A
    Only combination meter illumination does not change. A
    Lounge illumination / Push start button illumination does not change. B
    Other illumination (navigation, audio, etc.) does not change. C

    B: Go to step 3 

    C:  Go to step  4

    A : REPLACE COMBINATION METER ASSEMBLY 

  3. REPLACE BODY ECU 

    HINT:

    Check illumination circuit before replacing body ECU (See PROBLEM SYMPTOMS TABLE ).

    OK: 

    Operation of the light control rheostat returns to normal. 

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK : END 

  4. INSPECT COMBINATION METER ASSEMBLY 
    1. Disconnect the E2 connector.
    2. Measure the voltage according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E2-11 (ILL) - Body ground Ignition switch on (IG), and TAIL light ON 10 to 14 V
      E2-11 (ILL) - Body ground Ignition switch off Below 1 V

    NG: REPLACE COMBINATION METER ASSEMBLY 

    Fig 1: Identifying Combination Meter Connector Terminals
    G05006160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : CHECK ILLUMINATION 

  5. INSPECT LIGHT CONTROL RHEOSTAT 
    1. Remove the light control rheostat.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E1-1 (E) - E1-4 (RV) Rheostat knob fully turns clockwise. 8 to 12 Ω
      E1-1 (E) - E1-4 (RV) Rheostat knob fully turns counterclockwise. Approx. 0 Ω
      E1-2 (TC) - E1-3 (T) Rheostat knob fully turns clockwise. Below 1 Ω
      E1-2 (TC) - E1-3 (T) Rheostat knob fully turns counterclockwise. 10 kΩ or higher

    NG: REPLACE LIGHT CONTROL RHEOSTAT 

    Fig 2: Identifying Light Control Rheostat Connector Terminals
    G05006161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT) 
    1. Disconnect the E1 and E2 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E1-1 (E) - Body ground Always 10 kΩ or higher
      E1-2 (TC) - Body ground Always 10 kΩ or higher
      E1-3 (T) - Body ground Always 10 kΩ or higher
      E1-4 (RV) - Body ground Always 10 kΩ or higher
      E1-1 (E) - E2-22 (RE) Always Below 1 Ω
      E1-2 (TC) - E2-19 (TC SW) Always Below 1 Ω
      E1-3 (T) - E2-20 (RT) Always Below 1 Ω
      E1-4 (RV) - E2-21 (RV) Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Identifying Combination Meter And Light Control Rheostat Connector Terminals
    G05006162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE COMBINATION METER ASSEMBLY 

scientia non olet · About LEMON Manuals