Toyota Venza: System Description
SYSTEM DESCRIPTION
1. FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION
- The driver seat is equipped with slide, reclining, lifter, front vertical, and lumbar support adjustment functions.
- The memory call function uses the key ID code of the key to memorize and recall the appropriate driving position for each individual who possesses a master key or sub key.
2. FUNCTION OF MAIN COMPONENT
|
Component |
Function |
|
|---|---|---|
|
Position control ECU and switch assembly |
Based on the switch operation, seat adjuster signals are input to the position control ECU and switch assembly to adjust the seat accordingly. |
|
|
Front seat frame with adjuster assembly LH |
Slide motor |
Receives a signal from the position control ECU and switch assembly, and slides the seat forward and rearward. |
|
Front vertical motor |
Receives a signal from the position control ECU and switch assembly, and raises and lowers the front of the seat cushion. |
|
|
Lifter motor |
Receives a signal from the position control ECU and switch assembly, and raises and lowers the seat cushion. |
|
|
Position sensor |
Built into each motor and sends position data to the position control ECU and switch assembly so that it can detect the position at all times. |
|
|
Reclining motor |
Receives a signal from the position control ECU and switch assembly, and tilts the seatback forward and rearward. |
|
|
Lumbar support adjuster assembly |
Receives a signal from the front lumbar power seat switch and operates the built-in motor to adjust the lumbar support. |
|
|
Seat memory switch |
If the seat memory SET switch is being pressed when one of the M1 or M2 seat memory switches is pressed, or if one of the M1 or M2 switches is pressed within 3 seconds of pressing the SET switch, the outer mirror control ECU assembly LH sends the signals so that the seat position can be stored. Then, when a seat memory switch is pressed, a signal is sent to the outer mirror control ECU assembly LH and the seat position changes according to memory. |
|
|
Front lumbar power seat switch |
Operates the motor built into lumbar support adjuster assembly according to switch operation. |
|
3. SYSTEM OPERATION
The front power seat functions which can be operated with the power seat motors and memorized are shown below.
|
Seat Function |
Driver Seat |
|---|---|
|
Slide |
Power and Memory |
|
Reclining |
Power and Memory |
|
Front Vertical |
Power and Memory |
|
Lifter |
Power and Memory |
|
Lumbar Support adjustment |
Power |
The seat memory switch sends memory switch information to the outer mirror control ECU assembly LH. Then the information is sent to the main body ECU (driver side junction block assembly) via CAN and then an instruction to memorize the seat position is sent to the position control ECU and switch assembly via CAN. As a result, the seat position is memorized.
Precaution
PRECAUTION
1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following system after ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Main Body ECU (Driver Side Junction Block Assembly)
...
Other materials about Toyota Venza:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT DOOR LOCK ASSEMBLY LH
(a) Check the operation of the door lock motor.
(1) Apply battery voltage and check the operation of the door lock motor.
OK:
Measurement Condition
...
Removal
REMOVAL
PROCEDURE
1. REMOVE BACK DOOR PANEL TRIM ASSEMBLY
2. REMOVE REAR WIPER ARM HEAD CAP
(a) Disengage the 4 claws and remove the rear wiper arm head cap as shown
in the illustration.
3. ...
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