Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Power Mirrors do not Return to Memorized Position

DESCRIPTION

If any of the M1 or M2 seat memory switch is pressed, the outer mirror control ECU assembly LH detects the switch operation and sends the seat memory switch signal to the main body ECU (multiplex network body ECU) via CAN communication. The main body ECU (multiplex network body ECU) sends the reproduction signal to each outer mirror control ECU assembly via CAN communication. When receiving the reproduction signal, each outer mirror control ECU assembly operates the vertical and horizontal mirror motors, which are built into the outer rear view mirror assembly, to adjust the mirror surface to the stored position.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• The power mirror control system (for Gasoline Model with Memory) uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

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

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PROCEDURE

(a) When any seat memory switch (M1 or M2) is pressed, check that the driver seat moves to the memorized position.

Click here

OK:

Driver seat moves to the memorized position.

NG

GO TO FRONT POWER SEAT CONTROL SYSTEM (Power Seat does not Return to Memorized Position)

OK

(a) Check the electrical remote control mirror function.

Click here

OK:

Electrical remote control mirror function is normal.

NG

GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirror cannot be Adjusted with Power Mirror Switch)

OK

(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 / Mirror L or Mirror R / Data List.

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

OK:

ON (Memorized) appears on the screen.

NG

GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirror Surface Position is not Memorized)

OK

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

*a Turn to Fully Left Position

(b) Using the outer mirror switch assembly, turn the mirror surface to the fully left position.

(c) Press the M1 switch while the SET switch is being pressed.

(d) Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized.

(e) Using the outer mirror switch assembly, turn the mirror surface to the fully right position.

(f) Press the M1 switch.

(g) Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the memorized fully left position.

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

C

GO TO STEP 7

B

(a) Temporarily replace the outer rear view mirror assembly LH with a new or known good one.

Click here

NEXT

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

*a Turn to Fully Left Position

(b) Using the outer mirror switch assembly, turn the mirror surface to the fully left position.

(c) Press the M1 switch while the SET switch is being pressed.

(d) Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized.

(e) Using the outer mirror switch assembly, turn the mirror surface to the fully right position.

(f) Press the M1 switch.

(g) Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the memorized fully left position.

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY LH WAS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Temporarily replace the outer rear view mirror assembly RH with a new or known good one.

Click here

NEXT

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

*a Turn to Fully Left Position

(b) Using the outer mirror switch assembly, turn the mirror surface to the fully left position.

(c) Press the M1 switch while the SET switch is being pressed.

(d) Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized.

(e) Using the outer mirror switch assembly, turn the mirror surface to the fully right position.

(f) Press the M1 switch.

(g) Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the memorized fully left position.

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY RH WAS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH