Toyota Avalon Service & Repair Manual: Operating Light Control Rheostat does not Change Light Brightness

Toyota Avalon Service & Repair Manual / Vehicle Interior / Meter / Gauge / Display / Meter / Gauge System(for Gasoline Model) / Operating Light Control Rheostat does not Change Light Brightness

DESCRIPTION

The combination meter assembly receives signals through this circuit to adjust the illumination of the combination meter assembly. The combination meter assembly sets the illumination level based on the user operation of the light control rheostat switch in the trip switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT:

  • The illumination level of the combination meter assembly can be adjusted by pressing the light control rheostat switch (trip switch).
  • The illumination of the combination meter assembly dims when the taillights are turned on.
  • Setting the illumination to maximum brightness cancels the above dimming of the illumination.

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Light Control Switch (UP)

Light control rheostat up switch (Trip switch)

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Light Control Switch (DOWN)

Light control rheostat down switch (Trip switch)

OFF or ON

OFF: Switch released

ON: Switch pushed

-

Body Electrical > Combination Meter > Data List

Tester Display

Light Control Switch (UP)

Light Control Switch (DOWN)

OK:

Light control rheostat up or down switch (trip switch) condition displayed on the Techstream changes with the actual switch operation.

OK

REPLACE COMBINATION METER ASSEMBLY

NG

2.

INSPECT TRIP SWITCH

(a) Remove the trip switch.

Click here

(b) Inspect the trip switch.

Click here

NG

REPLACE TRIP SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (TRIP SWITCH - COMBINATION METER ASSEMBLY)

(a) Disconnect the G15 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G80-4 (RV) - G15-2 (TR)

Always

Below 1 Ω

G80-1 (E) - G15-5 (SW3)

Always

Below 1 Ω

G80-4 (RV) or G15-2 (TR) - Body ground

Always

10 kΩ or higher

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    On-vehicle Inspection

    Parts Location

    See More:

    Toyota Avalon Service & Repair Manual > Noise Filter: Installation
    INSTALLATION PROCEDURE 1. INSTALL RADIO SETTING CONDENSER (for Window Defogger) (a) Engage the claw to install a new terminal cover to the wire harness. NOTICE: Make sure to hold the crimped side of the terminal when installing the wire harness to the terminal cover. Make sure not to bend the expose ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

    © 2024 Copyright www.tavalon.net
    0.0119