Lexus ES: 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 (steering column assembly) and telescopic motor (steering column assembly), based on signals from each switch, to adjust the steering position. |
| Tilt motor (steering column assembly) | 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 (steering column assembly) | 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 mode 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.
HINT:
The default setting for the telescopic system of the auto away/return function is off. Whether or not the telescopic system of the auto away/return function operates can be set using customize settings.
(b) When the power source mode 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.
Click here .gif)
DRIVING POSITION MEMORY FUNCTION
(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, seat position and outer mirror surface position of the driver are stored.
READ NEXT:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary bat
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
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of
SEE MORE:
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT CAM TIMING CONTROL MOTOR WITH EDU ASSEMBLY (a) Check Rotation Direction Signal: (1) Connect the Techstream to the DLC3. (2) Turn the engine switch on (IG). (3) Turn the Techstream on. (4) Enter the following menus: Powertrain / Engine / Data List / VVT-iE M
Drive Motor "A" Control Module Unexpected Operation (P0A1B94)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU monitors the motor generator control ECU (MG ECU). The cause of this malfunction may be the following: Motor generator control ECU internal malfunction
Motor generator control ECU (MG ECU) malfunction
DESCRIPTION The hybrid veh
