BLOCKING SYSTEM TERMINALS OF ECU


  1. CHECK TELEPHONE TRANSCEIVER ASSEMBLY

    A01EVZ2E05

    1. Disconnect the I70 telephone transceiver assembly 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
      I70-6 (IG2) - I70-9 (E) LG - BR Ignition power supply Engine switch on (IG) 9 to 16 V
      I70-12 (+B) - I70-9 (E) G - BR +B power supply Always 9 to 16 V
      I70-9 (E) - Body ground BR - 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 I70 telephone transceiver assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I70-1 (BLK1) - I70-9 (E) L - BR Certification ECU (smart key ECU assembly) communication input Engine switch off 11 to 14 V
      I70-1 (BLK1) - I70-9 (E) L - BR Certification ECU (smart key ECU assembly) communication input Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)
      I70-2 (BLK4) - I70-9 (E) Y - BR Certification ECU (smart key ECU assembly) communication output Engine switch off Below 1 V
      I70-2 (BLK4) - I70-9 (E) Y - BR Certification ECU (smart key ECU assembly) communication output Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 2)
      I70-7 (BLK2) - I70-9 (E) R - BR ECM communication output Engine switch off Below 1 V
      I70-7 (BLK2) - I70-9 (E) R - BR ECM communication output Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)
      I70-8 (BLK3) - I70-9 (E) G - BR ECM communication input Engine switch off Below 1 V
      I70-8 (BLK3) - I70-9 (E) G - BR ECM communication input Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 2)

      • If the result is not as specified, the telephone transceiver assembly may have a malfunction.

    5. 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)

        A01EYV3E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection

        • I70-1 (BLK1) - I70-9 (E)

        • I70-7 (BLK2) - I70-9 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01EU6HE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection

        • I70-2 (BLK4) - I70-9 (E)

        • I70-8 (BLK3) - I70-9 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A01EWV5E17

    1. Disconnect the A43 certification ECU (smart key ECU assembly) 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
      A43-2 (+B) - A43-11 (E) W - W +B power supply Always 11 to 14 V
      A43-10 (CUTB) - A43-11 (E) L - W Dark current cut pin Always 11 to 14 V
      A43-11 (E) - Body ground W - Body ground Ground Always Below 1 Ω

    3. Reconnect the A43 certification ECU (smart key ECU assembly) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I78-5 (IG) - A43-11 (E) LG - W Ignition power supply Engine switch off → on (IG) Below 1 V → 11 to 14 V
      A43-14 (EFII) - A43-11 (E) G - W

      EFI communication input

      (Signal input from ECM to certification ECU (smart key ECU assembly))

      		 Engine switch off 11 to 14 V
      A43-13 (EFIO) - A43-11 (E) Y - W

      EFI communication output

      (Signal output from certification ECU (smart key ECU assembly) to ECM)

      		 Engine switch off Below 1 V

    5. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A43-14 (EFII) - A43-11 (E) G - W

      EFI communication input

      (Signal input from ECM to certification ECU (smart key ECU assembly))

      		 Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 1)
      A43-13 (EFIO) - A43-11 (E) Y - W

      EFI communication output

      (Signal output from certification ECU (smart key ECU assembly) to ECM)

      		 Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      Pulse generation

      (See waveform 2)

      • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

    6. 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)

        A01EYV3E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection A43-14 (EFII) - A43-11 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01EU6HE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection A43-13 (EFIO) - A43-11 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

  3. CHECK ECM

    A01EU6WE16

    Tech Tips

    The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage or resistance for that pair of terminals, displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the ECM terminal locations.

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    E26-49 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
    A25-1 (BATT) - E26-49 (E1) GR - BR +B power supply Always 11 to 14 V
    A25-2 (+B) - E26-49 (E1) P - BR +B power supply Engine switch on (IG) 11 to 14 V
    A25-3 (+B2) - E26-49 (E1) LG - BR +B power supply Engine switch on (IG) 11 to 14 V
    A25-30 (IMO) - E26-49 (E1) G - BR Certification ECU (smart key ECU assembly) communication input Engine switch off Below 1 V
    A25-30 (IMO) - E26-49 (E1) G - BR Certification ECU (smart key ECU assembly) communication input Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

    Pulse generation

    (See waveform 1)
    A25-31 (IMI) - E26-49 (E1) Y - BR Certification ECU (smart key ECU assembly) communication output Engine switch off Below 1 V
    A25-31 (IMI) - E26-49 (E1) Y - BR Certification ECU (smart key ECU assembly) communication output Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

    Pulse generation

    (See waveform 2)

    1. 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)

        A01EYV3E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection A25-30 (IMO) - E26-49 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      2. Waveform 2 (Reference)

        A01EU6HE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection A25-31 (IMI) - E26-49 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected