TERMINALS OF ECU
STEERING WHEEL HEATER CONTROL ASSEMBLY
HINT:
Perform the inspection from the harness side with the connectors connected.
(a) Measure the voltage or resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
---|---|---|---|
A-4 (IG) - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
A-3 (SW) - Body ground | Steering heater switch (Integration control&panel assembly) input signal | Engine switch on (IG), Steering heater switch (Integration control&panel assembly) pressed and held | 11 to 14 V |
A-2 (LED) - Body ground | LED output signal | Engine switch on (IG), Heated steering wheel system operating | Below 3 V |
A-1 (GND) - Body ground | Ground | Always | Below 1 Ω |
B-5 (SH1) - Body ground | Heater output signal | Engine switch on (IG), Heated steering wheel system operating | 11 to 14 V*1 |
B-3 (TH1) - Body ground | Thermistor input signal | Engine switch on (IG), Heated steering wheel system operating on at 0 to 40°C (32 to 104°F) | 2.5 to 4.8 V*2 |
B-2 (TH2) - Body ground | Thermistor ground | Engine switch on (IG), Heated steering wheel system operating | Below 1 V |
B-1 (SH2) - Body ground | Heater ground | Engine switch on (IG), Heated steering wheel system operating | Below 1 V |
HINT:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Wireless Door Lock Control System: Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION The main body ECU (multiplex network body ECU) stores DTCs when malfunctions occur. The diagnostic system allows for reading of the DTCs from the DLC3. Use the Techstream to check for malfunctions and perform repairs. CHECK DLC3 (a) Check the DLC3. Click here INSPECT B ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Front Seat Cushion 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 SEAT CUSHION HEATER ASSEMBLY (for Standard Se ...