Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Power Mirror cannot be Adjusted with Power Mirror Switch

DESCRIPTION

The outer mirror switch assembly sends the mirror adjust switch signals to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) then sends the received mirror adjust switch signals to each outer mirror control ECU assembly via CAN communication. Based on this signal, each outer mirror control ECU assembly operates the vertical and horizontal mirror motors to adjust the mirror surface position.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The power mirror control system (for Gasoline Model with Memory) uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the power mirror control system (for Gasoline Model with Memory) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

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 / Main Body / Data List.

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Mirror Selection SW (R)

Mirror select switch signal for RH mirror

OFF or ON

OFF: Mirror select switch off

ON: Mirror select switch R switch on

-

Mirror Selection SW (L)

Mirror select switch signal for LH mirror

OFF or ON

OFF: Mirror select switch off

ON: Mirror select switch L switch on

-

Mirror Position SW (R)

Mirror adjust switch signal (Right)

OFF or ON

OFF: Mirror adjust switch not pushed right

ON: Mirror adjust switch pushed right

Check with the mirror select switch L or R selected

Mirror Position SW (L)

Mirror adjust switch signal (Left)

OFF or ON

OFF: Mirror adjust switch not pushed left

ON: Mirror adjust switch pushed left

Check with the mirror select switch L or R selected

Mirror Position SW (Up)

Mirror adjust switch signal (Up)

OFF or ON

OFF: Mirror adjust switch not pushed up

ON: Mirror adjust switch pushed up

Check with the mirror select switch L or R selected

Mirror Position SW (Dwn)

Mirror adjust switch signal (Down)

OFF or ON

OFF: Mirror adjust switch not pushed down

ON: Mirror adjust switch pushed down

Check with the mirror select switch L or R selected

Body Electrical > Main Body > Data List

Tester Display

Mirror Selection SW (R)

Mirror Selection SW (L)

Mirror Position SW (R)

Mirror Position SW (L)

Mirror Position SW (Up)

Mirror Position SW (Dwn)

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

2.

INSPECT OUTER MIRROR SWITCH ASSEMBLY

(a) Remove the outer mirror switch assembly.

Click here

(b) Inspect the outer mirror switch assembly.

Click here

NG

REPLACE OUTER MIRROR SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I18 outer mirror switch assembly.

(b) Disconnect the G34 main body ECU (multiplex network body ECU).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I18-16 (E) - G34-9 (MIRE)

Always

Below 1 Ω

I18-13 (M+) - G34-7 (MIRB)

Always

Below 1 Ω

I18-15 (MSW) - G34-8 (MIRS)

Always

Below 1 Ω

I18-16 (E) or G34-9 (MIRE) - Body ground

Always

10 kΩ or higher

I18-13 (M+) or G34-7 (MIRB) - Body ground

Always

10 kΩ or higher

I18-15 (MSW) or G34-8 (MIRS) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Parts Location

    Power Mirror Surface Position is not Memorized

    See More:

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