ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK POWER SWITCH

    A01H1I1E11

    1. Disconnect the L36 switch connector.

    2. Measure the resistance of the wire harness.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L36-5 (GND) - Body ground W - 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 L36 switch connector.

    4. Measure the resistance and voltage of the connector.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L36-8 (AGND) - Body ground L - Body ground Ground Always Below 1 Ω
      L36-14 (VC5) - L36-8 (AGND) V - L Power supply Key is not in cabin Below 1 V
      Power switch is pressed* 4.6 to 5.4 V
      L36-10 (CODE) - L36-8 (AGND) W - L Demodulated signal of key code data Key is not in cabin Below 1 V
      Power switch is pressed and key is held close to power switch* Pulse generation (see waveform 1)
      L36-9 (TXCT) - L36-8 (AGND) BE - L Key code output signal Key is not in cabin Below 1 V
      Power switch is pressed and key is held close to power switch* Pulse generation (see waveform 2)

      Tech Tips

      *: Remove the key's battery before performing this inspection.


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

    5. A01GZM7E14

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Item Content
      Terminal No. (Symbols) L36-10 (CODE) - L36-8 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Power switch is pressed and key is held close to power switch*

      Tech Tips

      *: Remove the key's battery before performing this inspection.

    6. A01GY08E11

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Item Content
      Terminal No. (Symbols) L36-9 (TXCT) - L36-8 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Power switch is pressed and key is held close to power switch*

      Tech Tips

      *: Remove the key's battery before performing this inspection.

  2. CHECK CERTIFICATION ECU

    A01GXG8E34

    1. Disconnect the L15 ECU connector.

    2. Measure the resistance and voltage of the wire harness side connector.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L15-1 (+B1) - L15-17 (E) L - W-B +B power supply Always 11 to 14 V
      L15-18 (IG) - L15-17 (E) L - W-B Ignition power supply Power switch OFF Below 1 V

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

    3. Reconnect the L15 ECU connector.

    4. Measure the resistance and voltage of the connector.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-40 (AGND) - Body ground L - Body ground Power switch ground Always Below 1 Ω
      L15-30 (VC5) - L15-40 (AGND) V - L Power switch power supply Key is not in cabin Below 1 V
      Power switch is pressed* 4.6 to 5.4 V
      L15-9 (CODE) - L15-40 (AGND) W - L Power switch CODE input Key is not in cabin Below 1 V
      Power switch is pressed and key is held close to power switch* Pulse generation (see waveform 1)
      L15-8 (TXCT) - L15-40 (AGND) BE - L Power switch TX output Key is not in cabin Below 1 V
      Power switch is pressed and key is held close to power switch* Pulse generation (see waveform 2)

      Tech Tips

      *: Remove the key's battery before performing this inspection.


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

    5. A01GZM7E14

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Item Content
      Terminal No. (Symbols) L15-9 (CODE) - L15-40 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Power switch is pressed and key is held close to power switch*

      Tech Tips

      *: Remove the key's battery before performing this inspection.

    6. A01GY08E11

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Item Content
      Terminal No. (Symbols) L15-8 (TXCT) - L15-40 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Power switch is pressed and key is held close to power switch*

      Tech Tips

      *: Remove the key's battery before performing this inspection.

  3. CHECK ID CODE BOX

    A01H0AIE01

    1. Disconnect the L32 box connector.

    2. Measure the resistance and voltage of the wire harness side connector.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L32-8 (GND) - Body ground

      W-B*1 - Body ground

      B*2 - Body ground

      		 Ground Always Below 1 Ω
      L32-1 (+B) - L32-8 (GND)

      L - W-B*1

      L - B*2

      		 +B power supply Always 11 to 14 V

      Tech Tips

      *1: for LHD

      *2: for RHD


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

    3. Reconnect the L32 box connector.

    4. Measure the voltage of the connector.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L32-5 (EFII) - L32-8 (GND)

      B - W-B*1

      B - B*2

      		 Hybrid vehicle control ECU input signal Power switch OFF Below 1 V
      Power switch ON (IG) Pulse generation (see waveform 1)
      L32-6 (EFIO) - L32-8 (GND)

      L - W-B*1

      L - B*2

      		 Hybrid vehicle control ECU output signal Power switch OFF Below 1 V
      Power switch ON (IG) Pulse generation (see waveform 2)

      Tech Tips

      *1: for LHD

      *2: for RHD


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

    5. A01GW2WE14

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Item Content
      Terminal No. (Symbols) L32-5 (EFII) - L32-8 (GND)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Power switch ON (IG)
    6. A01GY0EE13

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Item Content
      Terminal No. (Symbols) L32-6 (EFIO) - L32-8 (GND)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Power switch ON (IG)

  4. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

    A01GZ5CE01

    1. Disconnect the DA and DF ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DA-41 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DF-1 (ACC) - DA-40 (GND2) B - W-B ACC power supply Power switch OFF Below 1 V
      Power switch ON (ACC) 11 to 14 V
      DF-1 (IG) - DA-40 (GND2) B - W-B IG power supply Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V

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

  5. CHECK STEERING LOCK ACTUATOR (STEERING LOCK ECU)

    A01GXZ1E19

    1. Disconnect the L33 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L33-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L33-7 (B) - Body ground P - Body ground +B power supply Always 11 to 14 V
      L33-6 (IG2) - Body ground L - Body ground Ignition power supply Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V

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

  6. CHECK HYBRID VEHICLE CONTROL ECU

    A01GYTCE03

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A77-7 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A77-6 (E12) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E58-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E58-7 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A76-1 (BATT) - A77-7 (E1) B-W - W-B Battery (for measuring battery voltage and for hybrid vehicle control ECU memory) Always 11 to 14 V
      A78-1 (+B1) - A77-7 (E1) B - W-B Power source of hybrid vehicle control ECU Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      A78-2 (+B2) - A77-7 (E1) L - W-B Power source of hybrid vehicle control ECU Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      A77-32 (IMI) - A77-7 (E1) L - W-B ID code box input signal Power switch OFF Below 1 V
      Power switch ON (IG) Pulse generation (see waveform 1)
      A77-33 (IMO) - A77-7 (E1) B - W-B ID code box output signal Power switch OFF Below 1 V
      Power switch ON (IG) Pulse generation (see waveform 2)
    2. A01GY0EE14

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference):
      Item Content
      Terminal No. (Symbols) A77-32 (IMI) - A77-7 (E1)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Power switch ON (IG)
    3. A01GW2WE15

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference):
      Item Content
      Terminal No. (Symbols) A77-33 (IMO) - A77-7 (E1)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Power switch ON (IG)