Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
HEATED STEERING WHEEL CONTROLLER (STEERING VIBRATION ECU)
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(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 | Power switch on (IG) | Pulse generation |
| A-4 (IG) - Body ground | IG power supply | Power switch on (IG) | 11 to 14 V |
| B-1 (SH1) - Body ground | Heater output signal | Power switch on (IG), Heated steering wheel system operating | Below 1 V |
| B-2 (TH1) - Body ground | Thermistor input signal | Power switch on (IG), Heated steering wheel system operating | 11 to 14 V*1 |
| B-3 (TH2) - Body ground | Thermistor ground | Power switch on (IG), Heated steering wheel system operating | 2.5 to 4.8 V*2 |
| B-4 (SH3) - Body ground | Heater ground | Power switch on (IG), Heated steering wheel system operating | Below 1 V |
| B-5 (SH2) - Body ground | Heater ground | Power 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 power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Tr
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:
Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
DESCRIPTION This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the navigation system vehicle customization screen. HINT: The certification ECU (smart key ECU assembly) controls the smart access system with push-button start (for Entry
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: Powertrain / Engine / Trouble Codes. Powertrain > Engine > Trouble Codes (e) Check the details of the DTCs. Click here CLEAR DTC
