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


  1. CHECK TRANSPONDER KEY AMPLIFIER

    A00538YE02

    1. Disconnect the D103 amplifier connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D103-7 (AGND) - Body ground R - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the D103 amplifier connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D103-1 (VC5) - D103-7 (AGND) B - R Power supply No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      D103-4 (CODE) - D103-7 (AGND) P - R 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)
      D103-5 (TXCT) - D103-7 (AGND) G - R 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.

    5. A005874E01
      *1 Waveform 1:

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D103-4 (CODE) - D103-7 (AGND) 5 V/DIV., 20 msec./DIV. Key inserted in ignition key cylinder
    6. A00565FE01
      *1 Waveform 2:

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D103-5 (TXCT) - D103-7 (AGND) 5 V/DIV., 20 msec./DIV. Key inserted in ignition key cylinder

  2. CHECK TRANSPONDER KEY ECU

    A0055ZBE02

    1. Disconnect the D102 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D102-16 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      D102-1 (+B) - D102-16 (GND) R - BR Battery Always 11 to 14 V
      D102-2 (IG) - D102-16 (GND) B - BR Ignition switch Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      D102-3 (KSW) - D102-16 (GND) L - BR Unlock warning switch No key in ignition key cylinder 10 kΩ or higher
      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 D102 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D102-14 (VC5) - D102-16 (GND) B - BR Power source No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder 4.6 to 5.4 V
      D102-7 (CTY) - D102-16 (GND) SB - BR Front door courtesy light switch (for Driver Side) Driver door closed 10 kΩ or higher
      Driver door open Below 1 Ω
      D102-4 (TXCT) - D102-16 (GND) G - BR Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 1)
      D102-15 (CODE) - D102-16 (GND) P - BR Transponder key amplifier communication signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation (see waveform 2)
      D102-13 (EFIO) - D102-16 (GND) P - BR ECM output signal Ignition switch off Below 1 V
      Ignition switch ON Pulse generation (see waveform 3)
      D102-12 (EFII) - D102-16 (GND) LG - BR ECM input signal Always Pulse generation (see waveform 4)
      D102-8 (IND) - D102-16 (GND) Y - BR Security indicator light signal Immobiliser set status Alternating between 11 to 14 V and below 1 V
      Immobiliser unset status Below 1 V
      D102-9 (D) - D102-16 (GND) P - BR Diagnosis tester communication Always Pulse generation
      D102-5 (AGND) - Body ground R - Body ground Ground Always Below 1 Ω

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

    5. A00565FE02
      *1 Waveform 1:

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D102-4 (TXCT) - D102-16 (GND) 5 V/DIV., 20 msec./DIV. Key inserted in ignition key cylinder
    6. A005874E02
      *1 Waveform 2:

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D102-15 (CODE) - D102-16 (GND) 5 V/DIV., 20 msec./DIV. Key inserted in ignition key cylinder
    7. A0055VFE02
      *1 Waveform 3:

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D102-13 (EFIO) - D102-16 (GND) 10 V/DIV., 500 msec./DIV. Ignition switch ON
    8. A00536QE02
      *1 Waveform 4:

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference):
      Terminal No. (Symbol) Tool Setting Condition
      D102-12 (EFII) - D102-16 (GND) 12 V/DIV., 100 msec./DIV. Always