Toyota Venza: Wireless-linked Return Function does not Operate

Toyota Venza Service Manual / Seat / Front Power Seat Control System(w/ Memory) / Wireless-linked Return Function does not Operate

DESCRIPTION

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

CAUTION / NOTICE / HINT

NOTICE:

The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there is no malfunction in the communication system by checking communication function of the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure (See page ).

PROCEDURE

1.	CHECK FRONT POWER SEAT CONTROL SYSTEM

(a) Check the operation of the power seats (See page ).

(b) Check whether seat positions can be stored in memory (See page ).

(d) Check the operation of memory call registration (See page ).

Result	Proceed to
OK	A
NG (power seat operation)	B
NG (seat position memory)	C
NG (seat position restoring)	D
NG (memory call 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 (WIRELESS UNLOCK OR ENTRY UNLOCK)

(a) Turn the ignition switch off.

(b) Close and lock all doors.

(d) Unlock the driver door by touching the driver door outside handle while holding the memory call registered key (entry unlock function).*

(e) Open the driver door and check that the driver seat moves to the memorized position.

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
Both memory call function linked with the wireless unlock function and entry unlock function do not operate.*	C

*: w/ Smart Key System

GO TO STEP 9

GO TO STEP 15

3.	CHECK WIRELESS UNLOCK FUNCTION

(a) Check the wireless unlock function (See page ). (w/ Smart Key System)

(b) Check the wireless unlock function (See page ). (w/o Smart Key System)

OK:

Wireless unlock function is normal.

Result	Proceed to
OK	A
NG (w/ Smart Key System)	B
NG (w/o Smart Key System)	C

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System)

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System)

4.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Use the memory call function and check the outer mirror operation (See page ).

Result	Proceed to
Outer mirrors operate normally	A
Outer mirrors do not operate normally (w/ Smart Key System)	B
Outer mirrors do not operate normally (w/o Smart Key System)	C

GO TO STEP 7

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

5.	REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

(a) Replace the position control ECU and switch assembly (See page ).

6.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle* while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

*: w/ Smart Key System

OK:

Driver seat moves to the memorized position.

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

7.	REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Replace the main body ECU (driver side junction block assembly) (See page ).

8.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

OK:

Driver seat moves to the memorized position.

END (MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

9.	CHECK SMART KEY SYSTEM (ENTRY UNLOCK FUNCTION)

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

OK:

Entry unlock function is normal.

GO TO SMART KEY SYSTEM (for Entry Function)

10.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Use the memory call function and check the outer mirror operation (See page ).

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

GO TO STEP 13

11.	REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

(a) Replace the position control ECU and switch assembly (See page ).

12.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

OK:

Driver seat moves to the memorized position.

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

13.	REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Replace the main body ECU (driver side junction block assembly) (See page ).

14.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

OK:

Driver seat moves to the memorized position.

END (MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

15.	CHECK MEMORY CALL FUNCTION (MIRROR OPERATION)

(a) Use the memory call function and check the outer mirror operation (See page ).

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

GO TO STEP 18

16.	REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY

(a) Replace the position control ECU and switch assembly (See page ).

17.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

OK:

Driver seat moves to the memorized position.

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

18.	READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

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

Main Body

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

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

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

Driver Seat

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

OK:

On the Techstream display, it is confirmed that the memory switch which is linked with a key ID has a memorized seat position. (For example, on the Techstream display, "Mem SW No. w/KeyID1" displays "MEM SW1" and "Seat Memory No1" displays "Mem".)

PERFORM MEMORY CALL REGISTRATION

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

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

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

Main Body

Tester Connection

Measurement Item/Range

Normal Condition

Diagnostic Note

D Door Courtesy SW

Front door courtesy light switch assembly LH signal / ON or OFF

ON: Driver door open

OFF: Driver door closed

OK:

On the Techstream screen, each item changes between ON and OFF according to the above.

GO TO LIGHTING SYSTEM (Door Courtesy Switch Circuit)

20.	REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Replace the main body ECU (driver side junction block assembly) (See page ).

21.	CHECK MEMORY CALL FUNCTION

(a) Store a seat position in memory (See page ).

(b) Perform memory call registration (See page ).

(d) Close and lock all doors.

(e) Unlock the driver door by pressing the unlock switch of the memory call registered key or touching the driver door outside handle while holding the memory call registered key.

(f) Open the driver door and check that the driver seat moves to the memorized position (See page ).

OK:

Driver seat moves to the memorized position.

END (MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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