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ECM Terminal Arrangement

  1. Steering lock actuator assembly (Steering lock ECM)
    Fig 1: Steering Lock Actuator Assembly (Steering Lock ECM) Connector Terminal Identification
    G10215713Courtesy of SUBARU OF AMERICA, INC.
    1. Measure the voltage, resistance, and waveform.
      Terminal No. (Terminal symbol) Input/Output Terminal description Inspection conditions Standard value Related data monitor
      D59-1 (GND) ↔ Chassis ground - GND Always Less than 1 Ω -
      D59-3 (SLR+) ↔ D59-1 (GND) Input Steering lock motor drive permission signal When all of the following conditions are met and the doors are closed →open, the steering lock motor is driven.
      • The steering lock is unlocked
      • IG & ACC OFF
      • The shifter is in the P position (Transmission A/T)
      		 Pulse generation (waveform 1) Check
      • Motor power supply short circuit history
      • Unlock request reception state
      • Lock request reception state
      D59-4 (SLP) ↔ D59-1 (GND) Output Steering lock bar position Steering lock →Steering unlock 11 to 14 V →1.2 V or less Check
      • Push button start malfunction history
      • Sensor malfunction history (Steering lock)
      D59-5 (LIN) ↔ D59-1 (GND) Input/Output LIN communication line - - Check
      • Communication allowed state (Steering lock)
      D59-6 (IGN1) ↔ D59-1 (GND) Input IG2 input power supply IG OFF →IG ON Less than 1 V →11 to 14 V Check
      • IG SW
      D59-7 (B) ↔ Chassis ground Input Power supply Always 11 to 14 V -
      CAUTION: The steering lock actuator assembly (Steering lock ECM) is incorporated with one motor and two sensors.
      NOTE:
      • When performing measurements while the steering lock actuator motor is stopped, measurements can be made without any special operation.
      • When performing measurements while the steering lock actuator motor is running, the following operations are necessary.
        • To unlock the steering, bring the electrical key transmitter sub-assembly (Electronic key) into the vehicle and turn the ignition to ACC ON or IG ON.
        • To lock the steering, open a door while the vehicle is set to IG OFF & ACC OFF, and the shifter is in the P position (Transmission A/T).
    2. Oscilloscope waveform.
      1. Waveform 1
        Item Contents
        Measuring terminal D59-3 (SLR+) ↔ D59-1 (GND)
        Equipment setting 2 V/DIV, 200 ms/DIV
        Measuring condition Steering lock actuator motor stopped →Steering lock actuator motor running →Steering lock actuator motor stopped
        Fig 2: Oscilloscope Waveform 1
        G10215714Courtesy of SUBARU OF AMERICA, INC.
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