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Home >> Lexus >> 2011 >> RX 350 AWD >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Meter / Gauge / Display (Diagnostic Codes & Symptom Tests) >> Meter / Gauge System >> Symptom Tests >> Accessory Meter does not Illuminate >> Procedure

Accessory Meter does not Illuminate: Procedure

  1. SYSTEM CHECK 
    1. Check the symptom of the accessory meter assembly.

      Result

      Result Proceed to
      Accessory meter assembly does not display at all. A
      Accessory meter assembly does not dim at night. B
      Clock does not change. C

    B → See step   4 

    C → See step   8 

    A: Go to next step 

  2. INSPECT FUSE (ECU-ACC, ECU-B NO. 1, ECU-B NO. 2, ECU-IG2) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ECU-ACC fuse Always Below 1 Ω
      ECU-B NO. 1 fuse Always Below 1 Ω
      ECU-B NO. 2 fuse Always Below 1 Ω
      ECU-IG2 fuse Always Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY CIRCUIT) 
    1. Disconnect the G1 connector.
      Fig 1: G1 Connector
      GTY353647Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G1-1 (IG+) - Body ground Always 11 to 14 V
      G1-2 (IG2) - Body ground Engine switch on (IG) 11 to 14 V
      G1-3 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V
      G1-13 (+B) - Body ground Always 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-12 (GND1) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   12 

  4. SYSTEM CHECK 
    1. Confirm the symptoms.

      Result

      Result Proceed to
      All illumination parts does not dim at night. A
      Only accessory meter assembly illumination does not dim at night. B

    B → See step   5 

    A → See step   11 

  5. INSPECT MULTIPLEX NETWORK BODY ECU 
    1. Disconnect the G1 connector.
      Fig 2: G1 Connector
      GTY353649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      G1-14 (ADIM) - Body ground Turn the engine switch on (IG), turn the light control switch to the tail or head position. 4 V or more
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)

    NG → See step   7 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - COMBINATION METER ASSEMBLY) 
    1. Disconnect the F15 connector.
      Fig 3: F15 & G1 Connectors
      GTY354933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the G1 connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-24 (ILL-) - F15-15 (ILL-) Always Below 1 Ω
      G1-24 (ILL-) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)
      *2 Front view of wire harness connector
      (to Combination Meter Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   12 

  7. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - MAIN BODY ECU) 
    1. Disconnect the F14 connector.
      Fig 4: F14 & G1 Connectors
      GTY354916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the G1 connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-14 (ADIM) - F14-22 (ACAN) Always Below 1 Ω
      G1-14 (ADIM) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)
      *2 Front view of wire harness connector
      (to Main Body ECU (Multiplex Network Body ECU))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   12 

  8. CHECK HARNESS AND CONNECTOR (HEATER CONTROL PANEL - ACCESSORY METER ASSEMBLY) 
    1. Disconnect the G8 connector.
      Fig 5: G8 & G1 Connectors
      GTY354932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the G1 connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-17 (CLK2) - G8-4 (CLK1) Always Below 1 Ω
      G1-17 (CLK2) - Body ground Always 10 kΩ or higher
      G1-18 (CLK4) - G8-12 (CLK3) Always Below 1 Ω
      G1-18 (CLK4) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)
      *2 Front view of wire harness connector
      (to Heater Control Panel)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. INSPECT HEATER CONTROL PANEL 
    1. Remove the heater control panel. Refer to REMOVAL .
      Fig 6: G1 Connector
      GTY358920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      G1-17 (CLK2) - G1-18 (CLK4) H switch pressed Below 1 Ω
      H switch not pressed 10 kΩ or higher
      G1-17 (CLK2) - G1-18 (CLK4) M switch pressed Below 1 Ω
      M switch not pressed 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Accessory Meter Assembly)

    NG → See step   10 

    OK → See step   12 

  10. REPLACE HEATER CONTROL PANEL. Refer to  REMOVAL 
  11. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL 
  12. REPLACE ACCESSORY METER ASSEMBLY. Refer to  REMOVAL 
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