Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: System Description
SYSTEM DESCRIPTION
HEATED STEERING WHEEL SYSTEM
(a) The heated steering wheel system heats the steering wheel assembly when the steering heater switch (Integration control and panel assembly) is operated.
(b) The heated steering wheel system uses a thermistor inside of the steering wheel assembly to detect the heater temperature and maintain the set temperature.
(c) The heated steering wheel timer function turns off the heater after a predetermined period of time.
HEATER CONTROLLER SYSTEM
(a) Operation description
(1) When the engine switch is on (IG), pressing the steering heater switch (integration control and panel assembly) operates the heated steering wheel system.When the heated steering wheel system is operating, the steering vibration and heater ECU illuminates the indicator LED and sends current to the steering wheel heater unit of the heated steering wheel system. Pressing the steering heater switch (integration control and panel assembly) again stops operation of the heated steering wheel system.
(2) A thermostat is installed in the steering wheel heater unit as a safety mechanism.
(3) The steering heater switch (integration control and panel assembly) LED turns off when either of the following occurs:
- An open or short in the steering wheel heater unit thermistor continues for 2 seconds or more.
- The steering heater switch (integration control and panel assembly) is pressed continuously for 10 seconds or more.
(4) The timer will turn off the heater 30 minutes after the steering heater switch was first turned on.
(b) Signal input / output description
| Signal | Signal Name | Function |
|---|---|---|
| Input | Thermistor input | Input of voltage corresponding to heater temperature |
| Input | Operating switch input | Input of power circuit operation estimate signal |
| Output | LED output | Output of LED |
| Output | Drive current output | Output of drive current |
Steering Wheel does not Heat Up When Heated Steering Wheel Switch is Pressed
DESCRIPTION Click here WIRING DIAGRAM CAUTION / NOTICE / HINT HINT:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
The steering whe ...
System Diagram
SYSTEM DIAGRAM SYSTEM DIAGRAM ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Front Seatback Heater: Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL FRONT SEATBACK HEATER ASSEMBLY (for Standard Seat T ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Can Communication System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Diagnostic Trouble Code Chart DTC No. Detection Item Trouble Area Note Link B1003 ECU Malfunction Network gateway ECU - U0199 Lost Communication with "Door Control Module A"
Outer mirror control ECU assembly (for front passenger side ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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