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:
Removal
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration)
that must be performed after parts are removed and installed, or replaced during
front brake flexible hose removal/installation are shown below.
Necessary Procedures After Parts
Terminals Of Ecm
TERMINALS OF ECM HINT: The standard normal voltage and resistance between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage and resistanc
