Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Wireless-linked Return Function does not Operate

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Seat / Front Power Seat Control System(for Hv Model With Memory) / Wireless-linked Return Function does not Operate

DESCRIPTION

When a door is unlocked using the wireless unlock function, the certification ECU (smart key ECU assembly) sends a key ID signal to the main body ECU (multiplex network body ECU). When a door is unlocked using the entry unlock function, the certification ECU (smart key ECU assembly) sends a door unlock signal and key ID signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives the door unlock signal, it stores the key ID. When the driver door is opened, the memory call information of the stored key ID is sent to each driving position related control ECU. Each control ECU receives the information and then performs the memory call operation according to predetermined control timing values.

CAUTION / NOTICE / HINT

NOTICE:

The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
Click here

PROCEDURE

1.	CHECK FRONT POWER SEAT OPERATION

(a) Check the operation of the power seat.

Click here

(b) Check the seat position memory function.

Click here

(d) Check the operation of memory registration of the memory call function.

Click here

Result	Proceed to
OK	A
NG (Power seat operation)	B
NG (Seat position memory function)	C
NG (Seat position restoration function)	D
NG (Memory registration)	E

GO TO PROBLEM SYMPTOMS TABLE

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized)

GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position)

GO TO OTHER DIAGNOSIS PROCEDURE (Wireless Transmitter Memory Function does not Operate)

2.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

Result	Proceed to
Memory call function linked with the wireless unlock function does not operate.	A
Memory call function linked with the entry unlock function does not operate.	B
Memory call function linked with the wireless unlock function and entry unlock function both do not operate.	C

GO TO STEP 9

GO TO STEP 15

3.	CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check the wireless unlock function of the wireless door lock control system.

Click here

OK:

Wireless unlock function is normal.

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

4.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 7

5.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

6.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock function operates normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

7.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

8.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock function operates normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

9.	CHECK SMART KEY SYSTEM (for Entry Function)

(a) Check the entry unlock function of the smart key system (for entry function).

Click here

OK:

Entry unlock function is normal.

GO TO SMART KEY SYSTEM (for Entry Function)

10.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 13

11.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

12.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the entry unlock function operates normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

13.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

14.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the entry unlock function operates normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION (SMART KEY ECU ASSEMBLY)

15.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Check the operation of the outer mirrors using the memory call function.

Click here

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally	B

GO TO STEP 18

16.	REPLACE POSITION CONTROL ECU ASSEMBLY

(a) Replace the position control ECU assembly with a new or known good one.

Click here

17.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call function linked with the wireless unlock and entry unlock function operate normally.

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

18.	READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION)

(a) Connect the Techstream to the DLC3.

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

(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
Mem SW No. w/KeyID1	Memory switch linked with key ID1	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID1 MEM SW1: M1 switch linked with key ID1 MEM SW2: M2 switch linked with key ID1 MEM SW3: M3 switch linked with key ID1*	-
Mem SW No. w/KeyID2	Memory switch linked with key ID2	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID2 MEM SW1: M1 switch linked with key ID2 MEM SW2: M2 switch linked with key ID2 MEM SW3: M3 switch linked with key ID2*	-
Mem SW No. w/KeyID3	Memory switch linked with key ID3	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID3 MEM SW1: M1 switch linked with key ID3 MEM SW2: M2 switch linked with key ID3 MEM SW3: M3 switch linked with key ID3*	-
Mem SW No. w/KeyID4	Memory switch linked with key ID4	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID4 MEM SW1: M1 switch linked with key ID4 MEM SW2: M2 switch linked with key ID4 MEM SW3: M3 switch linked with key ID4*	-
Mem SW No. w/KeyID5	Memory switch linked with key ID5	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID5 MEM SW1: M1 switch linked with key ID5 MEM SW2: M2 switch linked with key ID5 MEM SW3: M3 switch linked with key ID5*	-
Mem SW No. w/KeyID6	Memory switch linked with key ID6	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID6 MEM SW1: M1 switch linked with key ID6 MEM SW2: M2 switch linked with key ID6 MEM SW3: M3 switch linked with key ID6*	-
Mem SW No. w/KeyID7	Memory switch linked with key ID7	NONE, MEM SW1, MEM SW2 or MEM SW3*	NONE: No switches linked with key ID7 MEM SW1: M1 switch linked with key ID7 MEM SW2: M2 switch linked with key ID7 MEM SW3: M3 switch linked with key ID7*	-

*: Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Body Electrical > Main Body > Data List

Tester Display
Mem SW No. w/KeyID1
Mem SW No. w/KeyID2
Mem SW No. w/KeyID3
Mem SW No. w/KeyID4
Mem SW No. w/KeyID5
Mem SW No. w/KeyID6
Mem SW No. w/KeyID7

(f) Enter the following menus: Body Electrical / Driver Seat / Data List.

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

Body Electrical > Driver Seat > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Seat Memory No1

Seat position memorized with M1 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Seat Memory No2

Seat position memorized with M2 switch

Mem or Not Mem

Mem: Memorized

Not Mem: Not memorized

Body Electrical > Driver Seat > Data List

Tester Display
Seat Memory No1
Seat Memory No2

OK:

A seat position has been memorized for the seat position memory switch linked to the electrical key transmitter sub-assembly. (For example, the value of "Mem SW No. w/KeyID1" is MEM SW1 and the value of "Seat Memory No1" is Mem.)

PERFORM MEMORY CALL REGISTRATION

19.	READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH)

(a) Connect the Techstream to the DLC3.

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

(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

FL Door Courtesy SW

Front door courtesy light switch assembly (driver door) signal

ON or OFF

ON: Driver door open

OFF: Driver door closed

Body Electrical > Main Body > Data List

Tester Display
FL Door Courtesy SW

OK:

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

GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit)

20.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

21.	CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION AND AUTOMATIC MEMORY CALL FUNCTION)

(a) Check the memory registration and automatic memory call function of the memory call function.

Click here

OK:

Memory call functions linked with the wireless unlock function and entry unlock function operate normally.

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Wireless Transmitter Memory Function does not Operate

Front Seat Assembly

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