- Sends a seatback angle adjustment signal to the fold seat control ECU when this switch is operated. The seatback angle is adjusted based on this signal.
- Sends a rear folding or return operation signal to the fold seat control ECU when this switch is operated. The rear is folded or returned to the original position based on this signal.
Lexus NX: System Description
Lexus NX Service Manual / Vehicle Interior / Seat / Rear Power Seat Control System / System Description
SYSTEM DESCRIPTION
REAR POWER SEAT CONTROL SYSTEM DESCRIPTION
- This system has the following functions: reclining, folding and return, and jam protection.
- Both the left and right seats are equipped with this system. Each system operates independently.
FUNCTIONS OF MAIN COMPONENTS
| Component | Function |
|---|---|
| Rear Seatback Frame Sub-assembly (Reclining Motor, Fold Motor, Seatback Position Sensor) | The fold seat control ECU provides the voltage that is used to operate the reclining motor. The reclining motor reclines and returns the seatback of the rear (a Hall-type position sensor is installed in the fold motor to detect the seatback position). |
| Rear Power Seat Switch | |
| Fold Seat Switch | Sends a rear folding or return operation signal to the fold seat control ECU when this switch is operated. The rear is folded or returned to the original position based on this signal. |
| Fold Seat Control ECU | This ECU receives signals from each operation switch and drives the motor to perform storage, return and reclining of the seat. When the conditions required for operation are not fulfilled or when the system detects that something is interfering with the movement of the seat, this ECU sounds an internal alarm. |
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedures to troubleshoot the rear power seat control system. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER
Operation Check
OPERATION CHECK CHECK BASIC FUNCTION (a) Operate the rear power seat switch, No. 1 fold seat switch assembly and No. 2 fold seat switch assembly and check that each switch function operates normally.
Initialization
INITIALIZATION INITIALIZE (INITIAL POSITION MEMORIZATION) NOTICE: Perform initialization (initial position memorization) in the following situations.
When replacing the fold seat control ECU with a
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INSPECTION PROCEDURE 1. INSPECT HEADLIGHT ASSEMBLY LH (a) Apply battery voltage to the connector and check the light illumination condition. OK: Battery Connection Specified Condition Positive (+) → 3 (LO) Negative (-) → 4 (E) Headlight illuminates Positive (+) → 2 (SOL) Neg
Lost Communication with Cruise Control Module Missing Message (U010487)
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