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


  1. CHECK TRANSPONDER KEY AMPLIFIER

    A004ISGE03

    1. Disconnect the D54 transponder key amplifier connector.

    2. 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
      D54-7 (AGND) - Body ground - GR - Body ground Ground Always Below 1 Ω

    3. Reconnect the D54 transponder key amplifier connector.

    4. Measure the 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
      D54-1 (VC5) - D54-7 (AGND) Input R - GR Transponder key amplifier power supply Ignition switch ON 4.5 to 5.5 V
      D54-4 (CODE) - D54-7 (AGND) Output LG - GR Demodulated signal of key code data Key inserted in ignition key cylinder Pulse generation
      D54-5 (TXCT) - D54-7 (AGND) Output W-G - GR Key code output signal No key in ignition key cylinder Below 1 V
      Key inserted in ignition key cylinder Pulse generation

  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (NETWORK GATEWAY ECU)

    A004JW8E04
    Text in Illustration
    *1 Instrument Panel Junction Block Assembly *2 Main Body ECU (Network Gateway ECU)

    1. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

    2. Disconnect the D5, D6 and A73 main body ECU (network gateway ECU) connectors.

    3. 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
      MB-1 (BECU) - Body ground Input None - Body ground Battery power supply Always 11 to 14 V
      MB-8 (IG) - Body ground Input None - Body ground Ignition switch power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      MB-9 (ACC) - Body ground Input None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      MB-11 (GND) - Body ground - None - Body ground Ground Always Below 1 Ω
      MB-32 (BMPX) - Body ground Input None - Body ground Battery power supply Always 11 to 14 V
      D5-22 (KSW) - Body ground Input BR - Body ground Unlock warning switch input No key in ignition key cylinder (off) Below 1 V
      Key inserted ignition key cylinder (on) 11 to 14 V
      D6-1 (GND) - Body ground - B - Body ground Ground Always Below 1 Ω
      A73-4 (GND) - Body ground - B-Y - Body ground Ground Always Below 1 Ω

    4. Reconnect the D5, D6 and A73 main body ECU (network gateway ECU) connectors.

    5. Install the main body ECU (network gateway ECU) to the instrument panel junction block assembly.

    6. 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
      A73-5 (CODE) - Body ground Input LG - Body ground Demodulated signal of key code data Key inserted in ignition key cylinder Pulse generation
      A73-9 (IMO) - Body ground Input / output Y - Body ground EFI communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation
      A73-8 (VC5) - Body ground Output R - Body ground Transponder key amplifier power supply Ignition switch ON 4.5 to 5.5 V
      A73-15 (TXCT) - Body ground Input W - Body ground Key code output signal Key inserted in ignition key cylinder Pulse generation
      A73-16 (AGND) - Body ground - GR - Body ground Transponder key amplifier ground Always Below 1 Ω
      A73-17 (UART) - Body ground* Input / output SB - Body ground Transponder key ECU communication Key inserted in ignition key cylinder Pulse generation

      • *: w/ Transponder Key ECU Assembly

  3. CHECK TRANSPONDER KEY ECU ASSEMBLY

    A004H0OE03

    1. Disconnect the A64 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
      A64-1 (+B) - Body ground Input L-R - Body ground Battery power supply Always 11 to 14 V
      A64-5 (GND) - Body ground - B-Y - Body ground Ground Always Below 1 Ω

    3. Reconnect the A64 transponder key ECU assembly connector.

    4. Measure the 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
      A64-3 (UART) - A64-5 (GND) Input/Output SB - B-Y Main body ECU communication Key inserted in ignition key cylinder Pulse generation

  4. CHECK ECM

    A004HEOE05

    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
      A33-1 (+B2) - A36-4 (E01) Input V - B-L Battery power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      A33-2 (BATT) - A36-4 (E01) Input W - B-L Battery power supply Always 11 to 14 V
      A34-6 (+B) - A36-4 (E01) Input V - B-L Battery power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      A35-25 (IMO) - A36-4 (E01) Input/Output Y - B-L Main body ECU communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation
      A36-4 (E01) - Body ground - B-L - Body ground Ground Always Below 1 Ω