ENGINE IMMOBILISER SYSTEM(w/o Entry and Start System) TERMINALS OF ECU


  1. CHECK TRANSPONDER KEY AMPLIFIER

    A005LRPE02

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

      Inspection with Ignition Switch Off
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      F55-7 (AGND) - Body ground - GR - Body ground Ground Always Below 1 Ω -
      F55-1 (VC5) - F55-7 (AGND) Input P - GR Transponder key amplifier power supply No key in ignition key cylinder Below 1 V -
      F55-4 (CODE) - F55-7 (AGND) Output G - GR Demodulated signal of key code data No key in ignition key cylinder Below 1 V -
      F55-5 (TXCT) - F55-7 (AGND) Input L - GR Key code output signal No key in ignition key cylinder Below 1 V -

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

      Inspection of Waveforms of Communication Signals between Transponder Key Amplifier and Transponder Key ECU Assembly
      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC
      F55-1 (VC5) - F55-7 (AGND) Input P - GR Transponder key amplifier power supply No key in ignition key cylinder Below 1 V

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      (If immobiliser key code certification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above)
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      F55-4 (CODE) - F55-7 (AGND) Output G - GR Demodulated signal of key code data No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (See waveform 1)
      F55-5 (TXCT) - F55-7 (AGND) Input L - GR Key code output signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (See waveform 2)

      • If the result is not as specified, the amplifier may have a malfunction.

    2. A005GWSE01

      Inspect using an oscilloscope.

      Note

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


      1. Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F55-4 (CODE) - F55-7 (AGND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      2. A005LYHE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F55-5 (TXCT) - F55-7 (AGND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder

  2. CHECK TRANSPONDER KEY ECU ASSEMBLY

    A005HBKE02

    1. Disconnect the F54 transponder key ECU assembly connector.

    2. Measure the resistance and 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/DTC
      F54-16 (GND) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      F54-1 (+B) - F54-16 (GND) Input Y - BR Battery Always 11 to 14 V +B
      F54-2 (IG) - F54-16 (GND) Input P - BR Ignition switch Ignition switch off Below 1 V IG SW
      Ignition switch ON 11 to 14 V
      F54-3 (KSW) - F54-16 (GND) Input BE - BR Unlock warning switch No key in ignition key cylinder 10 kΩ or higher Key SW/B2780
      Key inserted in ignition key cylinder Below 1 Ω

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

    3. Reconnect the F54 transponder key ECU connector.

    4. Measure the resistance and 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/DTC
      F54-14 (VC5) - F54-16 (GND) Input P - BR Transponder key amplifier power supply No key in ignition key cylinder Below 1 V

      • BCC Malfunction

      • Abnormal Status

      • Different Encrypt Code

      • Different Serial Number

      (If immobiliser key code certification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above)
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      F54-4 (TXCT) - F54-16 (GND) Input L - BR Key code output signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (See waveform 1)
      F54-15 (CODE) - F54-16 (GND) Output G - BR Demodulated signal of key code data No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (See waveform 2)
      F54-13 (EFIO) - F54-16 (GND) Input R - BR ECM output signal Ignition switch off Below 1 V E/G Start Permission
      Ignition switch ON Pulse generation (See waveform 3)
      F54-12 (EFII) - F54-16 (GND) Output LG - BR ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected Pulse generation (See waveform 4) E/G Start Permission
      F54-8 (IND) - F54-16 (GND) Output SB - BR Security indicator light signal Immobiliser set Alternating between 11 to 14 V and below 1 V -
      Immobiliser unset Below 1 V
      F54-9 (D) - F54-16 (GND) Input/Output B - BR Diagnosis tester communication Always Pulse generation -
      F54-5 (AGND) - Body ground - GR - Body ground Transponder key amplifier ground Always Below 1 Ω -

      • If the result is not as specified, the ECU may have a malfunction.

    5. A005LYHE01

      Inspect using an oscilloscope.

      Note

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


      1. Waveform 1 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F54-4 (TXCT) - F54-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      2. A005GWSE01

        Waveform 2 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F54-15 (CODE) - F54-16 (GND)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Key inserted in ignition key cylinder
      3. A005L08E01

        Waveform 3 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F54-13 (EFIO) - F54-16 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Ignition switch ON
      4. A005KERE01

        Waveform 4 (Reference)

        Measurement Condition
        Item Content
        Tester Connection F54-12 (EFII) - F54-16 (GND)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected