Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
HEATED STEERING WHEEL CONTROLLER (STEERING VIBRATION ECU)
(a) Measure the voltage or resistance according to the value(s) in the table below.
HINT:
Perform the inspection from the harness side with the connectors connected.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| A-1 (GND) - Body ground | Ground | Always | Below 1 Ω |
| A-3 (LIN2) - Body ground | LIN communication signal | Engine switch on (IG) | Pulse generation |
| A-4 (IG) - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
| B-1 (SH1) - Body ground | Heater output signal | Engine switch on (IG), Heated steering wheel system operating | Below 1 V |
| B-2 (TH1) - Body ground | Thermistor input signal | Engine switch on (IG), Heated steering wheel system operating | 11 to 14 V*1 |
| B-3 (TH2) - Body ground | Thermistor ground | Engine switch on (IG), Heated steering wheel system operating | 2.5 to 4.8 V*2 |
| B-4 (SH3) - Body ground | Heater ground | Engine switch on (IG), Heated steering wheel system operating | Below 1 V |
| B-5 (SH2) - Body ground | Heater ground | Engine switch on (IG), Heated steering wheel system operating | Below 1 V |
HINT:
- *1: The current to the heater turns ON/OFF depending on the temperature of the thermistor. As a result, it may take several minutes before a voltage value is output.
- *2: When ambient temperature is 0 to 40°C (32 to 104°F).
READ NEXT:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / T
Fail-safe Chart
FAIL-SAFE CHART DIAGNOSIS FUNCTION
Heated steering wheel controller (steering vibration ECU) has diagnosis function. Condition Detection Condition Response when malfunction detected Recove
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa
SEE MORE:
Turn Signal Switch Circuit
DESCRIPTION The steering sensor receives the turn signal switch information and controls the turn signal lights. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHSTREAM (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the fol
Components
COMPONENTS ILLUSTRATION *1 ACCELERATOR PEDAL ASSEMBLY *2 ACCELERATOR PEDAL PAD *3 ACCELERATOR PEDAL SENSOR ASSEMBLY *4 NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N
