Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Automatic High Beam Switch Indicator does not Come ON

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System(for Hv Model Without Cornering Light) / Automatic High Beam Switch Indicator does not Come ON

DESCRIPTION

When the automatic high beam system is on, the main body ECU (multiplex network body ECU) illuminates the auto high beam switch indicator.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Automatic High Beam Switch Light

Auto high beam switch indicator light

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Automatic High Beam Switch Light

OK:

Auto high beam switch indicator light illuminates.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here

(b) Inspect the auto high beam switch.

Click here

NG

REPLACE AUTO HIGH BEAM SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - AUTO HIGH BEAM SWITCH)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G31-3 (IND+) - Body ground

Power switch off

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G32 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G31-4 (AZBI) - G32-23 (AHID)

Always

Below 1 Ω

G31-4 (AZBI) or G32-23 (AHID) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Lighting System(for Hv Model Without Cornering Light)

    Automatic High Beam System does not Operate or Operation Indicator does not Illuminate

    See More:

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