Lexus NX: System Description
SYSTEM DESCRIPTION
FUNCTION OF MAIN COMPONENTS
| Component | Function |
|---|---|
| Multiplex tilt and telescopic ECU | This ECU sends a control signal to the tilt motor and telescopic motor, based on signals from each switch, to adjust the steering position. |
| Tilt motor (Built-in tilt position sensor) | This motor is activated by a signal from the multiplex tilt and telescopic ECU and adjusts the tilt position. The tilt position sensor in the motor detects the tilt position by counting the number of pulses as the motor rotates. |
| Telescopic motor (Built-in telescopic position sensor) | This motor is activated by a signal from the multiplex tilt and telescopic ECU and adjusts the telescopic position. The telescopic position sensor in the motor detects the telescopic position by counting the number of pulses as the motor rotates. |
MANUAL OPERATION
(a) The tilt and telescopic positions can be adjusted as desired by operating the tilt and telescopic switch.
AUTO AWAY/RETURN FUNCTION
(a) When the power source is changed from on (ACC) or on (IG) to off, and the multiplex tilt and telescopic ECU receives a seat belt release signal, the steering wheel automatically tilts up and fully retracts.
(b) When the power source is changed from off to on (ACC) or on (IG), or the multiplex tilt and telescopic ECU receives a seat belt fastened signal, the steering wheel automatically returns to the previous position which was set before the power source was turned off.
(c) The auto away/return function can be prohibited by using the Techstream.
DRIVING POSITION MEMORY FUNCTION (W/ SEAT MEMORY)
(a) The system can memorize/recall three driving positions by operating the seat memory switch. Even if these positions are changed when a driver is getting in/out, it can recall the memory position by one-touch operation if the steering wheel column position and seat position of the driver are stored.
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System Diagram
SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Main Body ECU (Multiplex Network Body ECU) Multiplex Tilt and Telescopic EC
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE Standard voltage: 11 to 14 V
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first m
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Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure described below is for the LH side.
PROCEDURE 1. INSTALL CLEARANCE LIGHT ASSEMBLY LH (a) Attach the 2 claws to install the clearance light assembly LH. (b) Install the 3 screws and clip.
Rear Wheel House Plate
ComponentsCOMPONENTS ILLUSTRATION *1 REAR WHEEL FRONT HOUSE PLATE LH - - RemovalREMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. REMOVE REAR WHEEL FRONT HOUSE PLATE LH (a) Remove
