Component without harness connected
(Steering Lock ECU (Steering Lock Actuator Assembly))
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|
|H18-1 (GND) - Body ground||-||W-B - Body ground||Ground*||Always||Below 1 Ω||-|
|H18-3 (IGE) - H18-1 (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)||
|H18-4 (SLP1) - H18-1 (GND)||Output||P - W-B||Steering lock bar position signal (output signal from steering unlock sensor)||Steering locked → unlocked||11 to 14 V → Below 1.2 V||
|H18-5 (LIN) - H18-1 (GND)||Input/Output||B - W-B||LIN communication line||-||-||
|H18-6 (IG2) - H18-1 (GND)||Input||LG - W-B||Power source mode signal (IG2 power supply input for entire steering lock actuator assembly)*||Engine switch off → engine switch on (IG)||Below 1 V → 11 to 14 V||
|H18-7 (B) - Body ground||Input||B - Body ground||Power source*||Always||11 to 14 V||-|
*: When there is a problem with the power source input, the certification ECU (smart key ECU assembly) may store DTC B2786.
There is 1 motor and 2 sensors built into the steering lock actuator assembly.
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 engine switch on (ACC) or on (IG) with the shift lever in P.
To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
|*a||Steering lock motor not operating|
|*b||Steering lock motor operating|
|Tester Connection||H18-3 (IGE) - H18-1 (GND)|
|Tool Setting||2 V/DIV., 200 ms./DIV.|
|Vehicle Condition||Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating|