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METER / GAUGE SYSTEM Accessory Meter does not Illuminate

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DTC Code DTC Name
  Accessory Meter does not Illuminate
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DESCRIPTION

This circuit provides power to the accessory meter assembly.

The accessory meter illumination level can be adjusted by pressing the brightness switch in the radio receiver assembly.

Tip:

The radio receiver assembly should be replaced if any of the switches are malfunctioning.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • Inspect the fuses of circuits related to this system before performing the following inspection procedure.

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PROCEDURE


  1. Click here

    SYSTEM CHECK


    1. Check the operation 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
      Accessory meter assembly illumination does not change when the brightness switch is pushed. C

  2. Click here

    CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY CIRCUIT)


    1. A0006CLE02

      Disconnect the H86 accessory meter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H86-1 (ACC) - Body ground Power switch on (ACC) 11 to 14 V
      H86-2 (IG+) - Body ground Power switch on (IG) 11 to 14 V
      H86-4 (B1) - Body ground Power switch off 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-16 (GND1) - Body ground Always Below 1 Ω
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Accessory Meter Assembly)

    • OK

      REPLACE ACCESSORY METER ASSEMBLY (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    SYSTEM CHECK


    1. Confirm the symptoms.

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

  4. Click here

    INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. A0004TKE01

      Disconnect the H86 accessory meter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H86-6 (ADIM) - Body ground Turn the power switch on (IG), turn the headlight dimmer switch assembly to the tail or head position. 4 V or more
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Accessory Meter Assembly)

  5. Click here

    CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the H86 accessory meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-8 (ILL-) - H14-39 (ILL-) Always Below 1 Ω
      H86-8 (ILL-) - Body ground Always 10 kΩ or higher

    • OK

      REPLACE ACCESSORY METER ASSEMBLY (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3B instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-6 (ADIM) - 3B-38 (ACAN) Always Below 1 Ω
      H86-6 (ADIM) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly (Click here).

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

    3. A0007ZEE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-38 - MB-23 (ACAN) Always Below 1 Ω
      Table 3. Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    • OK

      REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

    • NG

      REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (Click here)

  8. Click here

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ACCESSORY METER ASSEMBLY)


    1. Disconnect the H42 radio receiver assembly connector.

    2. Disconnect the H86 accessory meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-7 (CLK2) - H42-4 (CLK1) Always Below 1 Ω
      H86-7 (CLK2) - Body ground Always 10 kΩ or higher
      H86-14 (CLK4) - H42-12 (CLK3) Always Below 1 Ω
      H86-14 (CLK4) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    INSPECT RADIO RECEIVER ASSEMBLY


    1. Reconnect the H42 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-7 (CLK2) - H86-14 (CLK4) Brightness switch pressed Below 1 Ω
      Brightness switch not pressed 10 kΩ or higher