ENGINE IMMOBILISER SYSTEM TERMINALS OF ECU


  1. CHECK ENGINE SWITCH


    1. Disconnect the J31 engine switch connector.

      A015YHPE06

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J31-8 (AGND) - Body ground GR - 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 J31 engine switch connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J31-9 (TXCT) - J31-8 (AGND) L - GR Key code output signal Key is not in cabin Below 1 V
      J31-9 (TXCT) - J31-8 (AGND) L - GR Key code output signal Key is held close to engine switch*

      Pulse generation

      (See waveform 1)
      J31-10 (CODE) - J31-8 (AGND) SB - GR Demodulated signal of key code data Key is not in cabin Below 1 V
      J31-10 (CODE) - J31-8 (AGND) SB - GR Demodulated signal of key code data Key is held close to engine switch*

      Pulse generation

      (See waveform 2)
      J31-14 (VC5) - J31-8 (AGND) R - GR Power supply Key is not in cabin Below 1 V
      J31-14 (VC5) - J31-8 (AGND) R - GR Power supply Brake pedal is depressed* 4.6 to 5.4 V

      Tech Tips

      *: Remove the key battery before performing this inspection.


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

    5. Inspect using an oscilloscope.


      1. A015ZE1E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection J31-9 (TXCT) - J31-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Key is held close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      2. A0162VME01

        Waveform 2 (Reference)

        Item Content
        Tester Connection J31-10 (CODE) - J31-8 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Key is held close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the P33 certification ECU (smart key ECU assembly) connector.

      A015YYUE31

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-1 (+B1) - P33-17 (E) L - W-B +B power supply Always 11 to 14 V
      P33-17 (E) - Body ground W-B - 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 P33 certification ECU (smart key ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-8 (TXCT) - P33-40 (AGND) G - LG Engine switch TXCT output Key is not in cabin Below 1 V
      P33-8 (TXCT) - P33-40 (AGND) G - LG Engine switch TXCT output Key is held close to engine switch* Pulse generation (See waveform 1)
      P33-9 (CODE) - P33-40 (AGND) GR - LG Engine switch CODE input Key is not in cabin Below 1 V
      P33-9 (CODE) - P33-40 (AGND) GR - LG Engine switch CODE input Key is held close to engine switch* Pulse generation (See waveform 2)
      P33-18 (IG) - P33-17 (E) B - W-B Ignition power supply Engine switch off Below 1 V
      P33-18 (IG) - P33-17 (E) B - W-B Ignition power supply Engine switch on (IG) 11 to 14 V
      P33-19 (ACC) - P33-17 (E) O - W-B ACC power supply Engine switch off Below 1 V
      P33-19 (ACC) - P33-17 (E) O - W-B ACC power supply Engine switch on (ACC) 11 to 14 V
      P33-30 (VC5) - P33-40 (AGND) L - LG Engine switch power supply Key is not in cabin Below 1 V
      P33-30 (VC5) - P33-40 (AGND) L - LG Engine switch power supply Brake pedal is depressed* 4.6 to 5.4 V
      P33-40 (AGND) - Body ground LG - Body ground Engine switch ground Always Below 1 Ω

      Tech Tips

      *: Remove the key battery before performing this inspection.


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

    5. Inspect using an oscilloscope.


      1. A015ZE1E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection P33-8 (TXCT) - P33-40 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Key is held close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

      2. A0162VME01

        Waveform 2 (Reference)

        Item Content
        Tester Connection P33-9 (CODE) - P33-40 (AGND)
        Tool Setting 2 V/DIV., 50 ms./DIV.
        Condition Key is held close to engine switch*

        Tech Tips

        *: Remove the key battery before performing this inspection.

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the J69 ID code box (immobiliser code ECU) connector.

      A0163G6E10

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J69-1 (+B) - J69-8 (GND) G - W-B +B power supply Always 11 to 14 V
      J69-8 (GND) - Body ground W-B - 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 J69 ID code box (immobiliser code ECU) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J69-5 (EFII) - J69-8 (GND) W - W-B ECM input signal Engine switch off Below 1 V
      J69-5 (EFII) - J69-8 (GND) W - W-B ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after engine switch first turned on (IG) after battery disconnected and connected.

      Pulse generation

      (See waveform 1)
      J69-6 (EFIO) - J69-8 (GND) P - W-B ECM output signal Engine switch off Below 1 V
      J69-6 (EFIO) - J69-8 (GND) P - W-B ECM output signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      • If the result is not as specified, the ID code box (immobiliser code ECU) may have a malfunction.

    5. Inspect using an oscilloscope.


      1. A015YL0E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection J69-5 (EFII) - J69-8 (GND)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after engine switch first turned on (IG) after battery disconnected and connected.
      2. A015ZD4E01

        Waveform 2 (Reference)

        Item Content
        Tester Connection J69-6 (EFIO) - J69-8 (GND)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)

  4. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. Disconnect the J29 steering lock ECU (steering lock actuator assembly) connector.

      A0163HPE16

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J29-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J29-2 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J29-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch off Below 1 V
      J29-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      J29-7 (B) - Body ground O - Body ground +B power supply Always 11 to 14 V

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

  5. CHECK POWER SOURCE CONTROL ECU


    1. Disconnect the J55 ECU connector.

      A0162Q4E01

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J55-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J55-12 (AM2) - Body ground O -Body ground +B power supply Always 11 to 14 V
      J55-33 (AM1) - Body ground O -Body ground +B power supply Always 11 to 14 V

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

  6. CHECK ECM


    1. Disconnect the E6 ECM connector.

      A0160PFE01

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E6-1 (E1) - Body ground W-B - 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 E6 ECM connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A6-30 (IMO) - E6-1 (E1) W-R - W-B ID code box (immobiliser code ECU) output signal Engine switch off Below 1 V
      A6-30 (IMO) - E6-1 (E1) W-R - W-B ID code box (immobiliser code ECU) output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after engine switch first turned on (IG) after battery disconnected and connected.

      Pulse generation

      (See waveform 1)
      A6-31 (IMI) - E6-1 (E1) LG - W-B ID code box (immobiliser code ECU) input signal Engine switch off Below 1 V
      A6-31 (IMI) - E6-1 (E1) LG - W-B ID code box (immobiliser code ECU) input signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

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

    5. Inspect using an oscilloscope.


      1. A015YL0E01

        Waveform 1 (Reference)

        Item Content
        Tester Connection A6-30 (IMO) - E6-1 (E1)
        Tool Setting 5 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after engine switch first turned on (IG) after battery disconnected and connected.
      2. A015ZD4E01

        Waveform 2 (Reference)

        Item Content
        Tester Connection A6-31 (IMI) - E6-1 (E1)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Engine switch on (IG)

  7. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)


    1. Disconnect the RD and RM cowl side junction block RH connectors.

      A015ZH5E04

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      RD-7 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      RK-5 (BECU) - Body ground G-R - Body ground Battery power supply Always 11 to 14 V
      RN-1 (BATB) - Body ground R - Body ground Ignition power supply Always 11 to 14 V

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

    3. Reconnect the RD and RM cowl side junction block RH connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J74-24 (IND) - Body ground LG - Body ground Indicator light signal Key is not in cabin (immobiliser system is not set) Alternating between 11 to 14 V (0.2 seconds) to below 1 V

      • If the result is not as specified, the main body ECU RH (cowl side junction block RH) may have a malfunction.