STEERING LOCK SYSTEM TERMINALS OF ECU


  1. CHECK STEERING LOCK ECU (for Manual Tilt and Manual Telescopic Steering Column)

    A003AS6E09

    1. Disconnect the D57 steering lock ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D57-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D57-6 (IG2) - D57-1 (GND) B - W-B IG2 signal input Engine switch off → engine switch on (IG) Below 1 V → 11 to 14 V
      D57-7 (B) - D57-1 (GND) LG - W-B Power source Always 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D57 steering lock ECU connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D57-3 (IGE) - D57-1 (GND) P - W-B Power source for motor drive

      When all conditions are met:


      • Steering lock unlocked

      • Engine switch off

      • Driver side door closed → opened

      		 11 to 14 V (Steering lock motor not operating) → Below 1 V (Steering lock motor operating) → 11 to 14 V (Steering lock motor not operating)
      D57-4 (SLP1) - D57-1 (GND) G - W-B Unlock position sensor output signal Steering lock locked → steering lock unlocked 11 to 14 V → Below 1.2 V

      If the result is not as specified, there may be a malfunction in the steering lock ECU.

  2. CHECK STEERING LOCK ECU (for Power Tilt and Power Telescopic Steering Column)

    A003E1NE02

    1. Disconnect the D108 steering lock ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D108-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D108-7 (IG2) - D108-1 (GND) B - W-B IG2 signal input Engine switch off → engine switch on (IG) Below 1 V → 11 to 14 V
      D108-2 (B) - D108-1 (GND) LG - W-B Power source Always 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D108 steering lock ECU connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D108-4 (IGE) - D108-1 (GND) P - W-B Power source for motor drive

      When all conditions are met:


      • Steering lock unlocked

      • Engine switch off

      • Driver side door closed → opened

      		 11 to 14 V (Steering lock motor not operating) → Below 1 V (Steering lock motor operating) → 11 to 14 V (Steering lock motor not operating)
      D108-5 (SLP1) - D108-1 (GND) G - W-B Unlock position sensor output signal Steering lock locked → steering lock unlocked 11 to 14 V → Below 1.2 V

      If the result is not as specified, there may be a malfunction in the steering lock ECU.