Toyota 4Runner: 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 passenger seat is equipped with slide and reclining adjustment functions.
2. FUNCTION OF MAIN COMPONENT
The following functions are available.
|
Components |
Function |
|---|---|
|
Seat slide motor |
Receives a signal from the front power seat switch and slides the seat forward and rearward. |
|
Seat reclining motor |
Receives a signal from the front power seat switch and reclines and returns the seatback. |
|
Seat front vertical motor |
Receives a signal from the front power seat switch and raises and lowers the front of the seat cushion. |
|
Seat lifter motor |
Receives a signal from the front power seat switch and raises and lowers the seat cushion. |
|
Lumbar support motor |
Receives a signal from the power seat switch assembly and adjusts the lumbar support adjuster. |
|
Seat position sensor |
Is built into each power seat motor and sends position data to the front power seat switch LH so that the ECU can detect the seat position at all times. |
|
Front power seat switch |
Based on the switches operated, seat adjuster signals are input into the front power seat switch LH and the seat is adjusted accordingly (for driver side). Directly sends seat adjuster signals to each power seat motor (for passenger side). |
|
Power seat switch assembly |
Directly sends seat adjuster signals to the lumbar support motor. |
|
Seat memory switch |
When the SET switch and memory switch are pressed simultaneously, a signal is input to the main body ECU (multiplex network body ECU) and the seat position is recorded. Then, when the memory switch is pressed, a signal is input to the main body ECU (Multiplex Network Body ECU) and the seat position changes according to memory. |
3. SYSTEM OPERATION
The front power seat functions which can be adjusted with power seat motors and/or memorized are shown in the chart below.
|
Seat Adjustment Function |
Driver Seat |
Passenger Seat |
|---|---|---|
|
Sliding |
Power and memory |
Power |
|
Reclining |
Power and memory |
Power |
|
Front Vertical |
Power and memory |
- |
|
Lifter |
Power and memory |
- |
|
Lumbar Support |
Power |
- |
For the memory function, the memory switch operation signal is first sent from the main body ECU (multiplex network body ECU) to the front power seat switch LH via the CAN communication line. Then, either the seat position is recorded in memory or a previously recorded seat position is recalled.
Parts Location
PARTS LOCATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Main Body ECU (Multiplex Network Body ECU)
...
Other materials about Toyota 4Runner:
Inspection
INSPECTION
PROCEDURE
1. INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condit ...
If the electronic key does not operate properly (vehicles with a smart key
system)
If communication between the electronic key and vehicle is interrupted
or the electronic key cannot be used because the battery is depleted, the smart
key system and wireless remote control cannot be used. In such cases, the doors
can be opened and ...
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