STEERING LOCK SYSTEM TERMINALS OF ECU


  1. TERMINAL INSPECTION

    B007S93E05

    1. Disconnect the H80 steering lock ECU (steering lock actuator assembly) connector.

    2. 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
      H80-1 (GND) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      H80-6 (IG2) - H80-1 (GND) Input B - 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

        Entry&Start

      • Ignition Switch
      H80-7 (B) - Body ground Input W - Body ground Power source Always 11 to 14 V -

    3. Reconnect the H80 steering lock ECU (steering lock actuator assembly) connector.

    4. Measure the voltage 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
      H80-4 (SLP1) - H80-1 (GND) Output LG - W-B Steering lock bar position signal (output signal from steering unlock sensor) Steering locked → unlocked 11 to 14 V → Below 1.5 V

        Entry&Start

      • Sensor Value
      H80-5 (LIN) - H80-1 (GND) Input/Output SB - W-B LIN communication line - -

        Entry&Start

      • Steering Lock Start Cond

    5. Check the signal waveform according to the condition(s) in the table below.

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      H80-3 (IGE) - H80-1 (GND) Input V - 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:


      • Shift lever in P

      • Steering lock unlocked in advance by carrying key and turning engine switch on (IG)

      • After above conditions met, engine switch turned off

      		 Pulse generation (see waveform)

        Entry&Start

      • Power Supply Short

      • Unlock Request Receive

      • Lock Request Receive

      Note

      There are 1 motor and 2 sensors built into the steering lock actuator assembly.

      Tech Tips


      • 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.


      1. B007QVHE01
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

        Item Content
        Tester Connection H80-3 (IGE) - H80-1 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition Steering lock motor not operating → Operating → Not operating