Lexus NX: System Description
SYSTEM DESCRIPTION
FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION
- The driver seat is equipped with slide, reclining, rear 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.
FUNCTION OF MAIN COMPONENT
| Component | Function | |
|---|---|---|
| Front power seat switch LH | Based on the switch operation, seat adjuster signals are input to the front power seat switch LH to adjust the seat accordingly. | |
| Front seat adjuster assembly LH | Slide motor | Receives a signal from the front power seat switch LH and slides the seat forward and rearward. |
| Front vertical motor | Receives a signal from the front power seat switch LH and raises and lowers the front of the seat cushion. | |
| Rear lifter motor | Receives a signal from the front power seat switch LH and raises and lowers the seat cushion. | |
| Position sensor | Built into each motor and sends position data to the front power seat switch LH so that it can detect the position at all times. | |
| Separate type front seatback spring assembly LH | Reclining motor | Receives a signal from the front power seat switch LH and tilts the seatback forward and rearward. |
| Lumbar support adjuster assembly LH | 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, M2 or M3 seat memory switches is pressed, or if one of the M1, M2 or M3 switches is pressed within 3 seconds of pressing the SET switch, the outer mirror control ECU assembly (for Driver Side) 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 (for Driver Side) and the seat position changes according to memory. | |
| Front lumbar power seat switch | Operates the motor built into the lumbar support adjuster assembly according to switch operation. | |
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 |
| Rear lifter | Power and Memory |
| Lumbar Support adjustment | Power |
The seat memory switch sends memory switch information to the outer mirror control ECU assembly (for Driver Side). Then the information is sent to the main body ECU (multiplex network body ECU) via CAN and then an instruction to memorize the seat position is sent to the front power seat switch LH via CAN. As a result, the seat position is memorized.
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the front power seat control system (w/ Memory).
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
Operation Check
OPERATION CHECK CHECK POWER SEAT FUNCTION (a) Check the basic functions. *a Slide Function *b Reclining Function *c Rear Lifter Function *d Front Vertical Function *e Lum
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first make sure th
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Removal
REMOVAL PROCEDURE 1. PRECAUTION CAUTION: Be sure to read Precaution thoroughly before serving. Click here NOTICE: After turning the power switch off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal. Click here 2. DISCONNECT CABLE FROM NEGATIVE AUXILIA
Stereo Component Amplifier Malfunction (B15A3)
DESCRIPTION These DTCs are stored when a malfunction occurs in the stereo component amplifier assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B15A3 Stereo Component Amplifier Malfunction When one of the conditions below is met:
Internal power supply malfunct
