- Shift lever in P
- Steering lock unlocked in advance by carrying key and turning power switch on (IG)
- After above conditions met, power switch turned off
Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
TERMINAL INSPECTION
| *a | Component without harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) | - | - |
(a) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Input/Output | Wiring Color | Terminal Description | Condition | Specified Condition | Related Data List Item |
|---|---|---|---|---|---|---|
| I2-1 (GND) - Body ground | - | W-B - Body ground | Ground | Always | Below 1 Ω | - |
| I2-3 (IGE) - I2-1 (GND) | Input | L - W-B | Steering lock motor activation command signal (motor activation command signal sent from certification ECU (smart key ECU assembly)) | Any door opened when conditions below met, and then steering lock motor activated: | Pulse generation (see waveform) | Smart Access
|
| I2-4 (SLP1) - I2-1 (GND) | Output | Y - W-B | Steering lock bar position signal (output signal from steering unlock sensor) | Steering locked → unlocked | 11 to 14 V → Below 1.5 V | Smart Access
|
| I2-5 (LIN) - I2-1 (GND) | Input/Output | G - W-B | LIN communication line | - | - | Smart Access
|
| I2-6 (IG2) - I2-1 (GND) | Input | P - W-B | Power source mode signal (IG2 power supply input for entire steering lock actuator assembly) | Power switch off → power switch on (IG) | Below 1 V → 11 to 14 V | - |
| I2-7 (B) - Body ground | Input | L - Body ground | Power source | Always | 11 to 14 V | - |
NOTICE:
There is 1 motor and 2 sensors built into the steering lock actuator assembly.
HINT:
- When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
-
In order to take measurements when the lock motor is operating, perform either of the following operations:
- To unlock the steering, carry the key and turn the power switch on (ACC) or on (IG).
- To lock the steering, turn the power switch off with the shift lever in P, and then open a door.
(1) Waveform
| *a | Steering Lock Motor not Operating |
| *b | Steering Lock Motor Operating |
| Item | Content |
|---|---|
| Tester Connection | I2-3 (IGE) - I2-1 (GND) |
| Tool Setting | 2 V/DIV., 200 ms./DIV. |
| Vehicle Condition | Steering lock motor not operating → Operating → Not operating |
READ NEXT:
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DIAGNOSIS SYSTEM DESCRIPTION NOTICE:
When using the Techstream with the power switch off to confirm DTCs or Data List information related to the smart access system with push button start, the Tech
Dtc Check / Clear
DTC CHECK / CLEAR NOTICE:
The steering lock ECU (steering lock actuator assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the p
Data List / Active Test
DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any part
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