ENGINE IMMOBILISER SYSTEM(w/o Power Switch) TERMINALS OF ECU


  1. CHECK TRANSPONDER KEY ECU ASSEMBLY

    A01UXQ8E02

    1. Disconnect the F40 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
      F40-5 (GND) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      F40-1 (+B) - F40-5 (GND) Input Y - BR Auxiliary battery Ignition switch off 11 to 14 V +B
      F40-2 (IG) - F40-5 (GND) Input P - BR Ignition switch Ignition switch off Below 1 V IG SW
      Ignition switch ON 11 to 14 V
      F40-3 (KSW) - F40-5 (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

    3. Reconnect the F40 transponder key ECU connector.

    4. Measure the resistance, voltage and check for pulses 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
      F40-9 (D) - F40-5 (GND) Input/Output B - BR DLC3 communication Without communication Below 1 V -
      During communication Pulse generation
      F40-4 (ANT1) - F40-5 (GND) Input/Output GR - BR Transponder key coil power source No key in ignition key cylinder 4 to 6 V -
      Within 3 seconds of inserting key into ignition cylinder Pulse generation (See waveform 1)
      F40-15 (ANT2) - F40-5 (GND) Input/Output L - BR Transponder key coil communication No key in ignition key cylinder 4 to 6 V -
      Within 3 seconds of inserting key into ignition cylinder Pulse generation (See waveform 2)
      F40-13 (EFIO) - F40-5 (GND) Input R - BR Hybrid vehicle control ECU output signal Ignition switch off Below 1 V E/G Start Permission
      Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected Pulse generation (See waveform 3)
      F40-12 (EFII) - F40-5 (GND) Output LG - BR Hybrid vehicle control ECU input signal Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected Pulse generation (See waveform 4) E/G Start Permission

      If the result is not as specified, the transponder key ECU assembly may be malfunctioning.

    5. Using an oscilloscope, check the waveform.


      1. Waveform 1 (Reference)

        A01UYG2E08
        Measurement Condition
        Item Content
        Tester Connection F40-4 (ANT1) - F40-5 (GND)
        Tool Setting 20 V/DIV., 2 s./DIV.
        Condition Within 3 seconds of inserting key into ignition cylinder

      2. Waveform 2 (Reference)

        A01UYXPE04
        Measurement Condition
        Item Content
        Tester Connection F40-15 (ANT2) - F40-5 (GND)
        Tool Setting 20 V/DIV., 2 s./DIV.
        Condition Within 3 seconds of inserting key into ignition cylinder

      3. Waveform 3 (Reference)

        A01V26LE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F40-13 (EFIO) - F40-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected

      4. Waveform 5 (Reference)

        A01UZGBE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F40-12 (EFII) - F40-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected

  2. CHECK HYBRID VEHICLE CONTROL ECU

    A01UXLGE02

    1. Measure the resistance and voltage, and check for pulses 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
      A26-1 (+B2) - F55-5 (E01) Input L - W-B IG power supply Ignition switch ON 11 to 14 V -
      A27-4 (+B1) - F55-5 (E01) Input L - W-B IG power supply Ignition switch ON 11 to 14 V -
      A27-6 (MREL) - F55-5 (E01) Input G - W-B IG power supply Ignition switch ON 11 to 14 V -
      F55-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      F55-6 (E1) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      F56-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      F56-23 (IMO) - F55-6 (E1) Input LG - BR Transponder key ECU assembly communication input Ignition switch off 11 to 14 V E/G Start Permission
      Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected

      Pulse generation

      (See waveform 1)

      		 E/G Start Permission
      F56-22 (IMI) - F55-6 (E1) Output R - BR Transponder key ECU assembly communication output Ignition switch off Below 1 V E/G Start Permission
      Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected

      Pulse generation

      (See waveform 2)

      		 E/G Start Permission

    2. Inspect using an oscilloscope.


      1. Waveform 1 (Reference)

        A01UZGBE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F56-23 (IMO) - F55-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected

      2. Waveform 2 (Reference)

        A01V26LE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection F56-22 (IMI) - F55-6 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after hybrid control system starts, or within 3 seconds after ignition switch first turned to ON after auxiliary battery disconnected and reconnected