| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001APTC |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (for Gasoline Model with Memory): Wireless Transmitter Memory Function does not Operate; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
Wireless Transmitter Memory Function does not Operate |
DESCRIPTION
With the engine switch on (IG) and the driver door closed, pressing the manual lock or unlock switch on the multiplex network master switch assembly while holding a seat memory switch (M1 or M2 switch) will register the transmitter recognition code into the seat memory switch that was pressed. After registration is completed, the answer back buzzer sounds.
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.
-
The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.
-
The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Click here
![2019 - 2022 MY Avalon [04/2018 - ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for Gasoline Model with Memory): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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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 POWER DOOR LOCK CONTROL SYSTEM |
(a) Check the manual lock/unlock function by using the door control switch (multiplex network master switch assembly).
Click here
OK:
Manual lock/unlock function operates normally.
| NG |
|
|
|
2. |
CHECK SMART KEY SYSTEM (for Start Function) |
(a) Check that the engine starts normally when the engine switch is pressed while carrying the electrical key transmitter sub-assembly and with the brake pedal depressed.
OK:
Engine starts normally.
| NG |
|
|
|
3. |
CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION |
(a) Check the seat position memory and restoring functions.
Click here
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Seat position memory function does not operate normally) |
B |
|
NG (Seat position restoring function does not operate normally) |
C |
| B |
|
GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat Position is not Memorized) |
| C |
|
GO TO OTHER DIAGNOSIS PROCEDURE (Power Seat does not Return to Memorized Position)
|
|
|
4. |
READ VALUE USING TECHSTREAM (DRIVER DOOR COURTESY SWITCH) |
(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 |
|---|---|---|---|---|
|
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.
| NG |
|
|
|
5. |
CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION) |
(a) Check the memory registration of the memory call function.
Click here
OK:
A seat position can be registered normally.
| NG |
|
|
|
6. |
READ VALUE USING TECHSTREAM (MEMORY CALL REGISTRATION) |
(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 |
|---|---|---|---|---|
|
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 |
OK:
A seat position memory switch is linked to the electrical key transmitter sub-assembly.
| NG |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
7. |
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:
A seat position can be registered and the automatic memory call function operates normally.
| OK |
|
| NG |
|
GO TO OTHER DIAGNOSIS PROCEDURE (Wireless-linked Return Function does not Operate) |
|
8. |
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
|
|
9. |
CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION) |
(a) Check the memory registration of the memory call function.
Click here
OK:
A seat position can be registered normally.
| OK |
|
END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE) |
|
|
10. |
REPLACE POSITION CONTROL ECU ASSEMBLY |
(a) Replace the position control ECU assembly with a new or known good one.
Click here
|
|
11. |
CHECK MEMORY CALL FUNCTION (MEMORY REGISTRATION) |
(a) Check the memory registration of the memory call function.
Click here
OK:
A seat position can be registered normally.
| OK |
|
END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
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