ENTRY AND START SYSTEM(for Start Function) TERMINALS OF ECU

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B264892N68

    1. Disconnect the G84 and G82 connectors.

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item

      G82-7 (STA) - Body ground

      Input

      B - Body ground

      When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".

      20°C (68°F)

      100 to 150 Ω

      -

      G82-5 (STAR) - Body ground*1

      Input/Output

      W - Body ground

      • Outputs voltage to the starter relay:

      • Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 500 rpm or more continues for 500 ms or more.)

      Tip:

      When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.

      Shift lever in any position other than P or N → shift lever in P or N (at 20°C (68°F)).

      10 kΩ or higher →100 to 150 Ω

      -

      G82-5 (STAR) - Body ground*1

      Input/Output

      W - Body ground

      • Receives neutral start switch (P, N position detection) signal:

      • Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

      Perform the following operations except while the engine is cranking:

      • Shift lever in any position other than P or N → shift lever in P or N(at 20°C (68°F))

      30 kΩ or higher → 100 to 150 Ω

      Neutral SW/

      Clutch SW

      G82-5 (STAR) - Body ground*2

      Input/Output

      W - Body ground

      • Outputs voltage to the starter relay:

      • Outputs starter relay activation voltage (12 V) when engine is being started.

        Outputs for maximum of 30 seconds. Turns off when engine speed is 500 rpm or more for 500 ms or more.

      Clutch pedal released → Clutch pedal depressed

      10 kΩ or higher → 100 to 150 Ω

      -

      G82-5 (STAR) - Body ground*2

      Input/Output

      W - Body ground

      • Receives clutch start switch signal:

      • Monitors whether clutch start switch is on or off. Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly).

        When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

      Perform the following operations except while the engine is cranking:

      • Clutch pedal released → Clutch pedal depressed

      30 kΩ or higher → 100 to 150 Ω

      Neutral SW/ Clutch SW

      G82-16 (NE) - Body ground

      Input

      P - Body ground

      Engine speed signal

      Always

      10 kΩ or higher

      Engine Condition

      G82-9 (IG2D) - Body ground

      Output

      GR - Body ground

      IG2 signal

      20°C (68°F)

      130 to 231 Ω

      IG2 Relay Monitor (Outside)

      G82-18 (STP1) - Body ground*1

      Input

      L - Body ground

      Stop light switch signal

      Brake pedal released → Brake pedal depressed

      9 V or higher → 1 V or less

      Stop Light Switch1

      G82-2 (+B) - G82-11 (E)

      Input

      W - BR

      Power source

      Always

      11 to 14 V

      -

      G84-26 (SLP) - G82-11 (E)

      Input

      B - BR

      Steering lock position signal

      Always

      10 kΩ or higher

      Steering Unlock Switch

      G84-25 (P) - G82-11 (E)*1

      Input

      R - BR

      P position signal

      Shift lever in P → Shift lever not in P

      40 kΩ or higher → 200 Ω or less

      Shift P Signal

      G82-11 (E) - Body ground

      -

      BR - Body ground

      GND

      Always

      Below 1 Ω

      -

      G84-30 (SSW2) - Body ground

      Input

      G - Body ground

      SSW2 contact signal

      Tip:

      Backup for SSW1. Behaves the same way as SSW1.

      Engine switch pushed → Engine switch not pushed

      Below 1 Ω → 10 kΩ or higher

      Start Switch2

      G84-28 (SSW1) - Body ground

      Input

      LG - Body ground

      SSW1 contact signal

      Engine switch pushed → Engine switch not pushed

      Below 1 Ω → 10 kΩ or higher

      Start Switch1

      G84-4 (ACCD) - Body ground

      Output

      R - Body ground

      ACC signal

      20°C (68°F)

      182 to 273 Ω

      ACC Relay Monitor

      G84-6 (IG1D) - Body ground

      Output

      P - Body ground

      IG1 signal

      20°C (68°F)

      61 to 91 Ω

      IG1 Relay Monitor (Outside)

      G82-10 (CUTB) - G82-11 (E)

      Input

      P - BR

      Dark current cut pin*3

      Always

      11 to 14 V

      -

      G84-27 (SPD) - Body ground

      Input

      G - Body ground

      Vehicle speed signal

      Always

      30 kΩ or higher

      Vehicle Speed Signal

      *1: except Manual Transaxle

      *2: for Manual Transaxle

      *3: In order to prevent the vehicle battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of electric waves every 0.25 seconds that form the detection area stops).

    3. Reconnect the G82 and G84 connectors.

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection

      Input/Output

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      Related Data List Item

      G82-7 (STA) - G82-11 (E)

      Input

      B - BR

      When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".

      With the brake pedal depressed, the engine switch is pressed and held (starter on) → After approx. 1 sec. has elapsed, the engine switch is released (starter off)

      6 V or higher*3 → 1.5 V or less

      -

      G82-5 (STAR) - G82-11 (E)*1

      Input/Output

      W - BR

      • Outputs voltage to the starter relay:

      • Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 500 rpm or more continues for 500 ms or more.)

      Tip:

      When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.

      With the brake pedal depressed, the engine switch is pressed and held → After approx. 1 sec. has elapsed, the engine switch is released

      6 V or higher*3 → 1.5 V or less

      -

      G82-5 (STAR) - G82-11 (E)*1

      Input/Output

      W - BR

      • Receives neutral start switch (P, N position detection) signal:

      • Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

      Perform the following operations except while the engine is cranking:

      • Shift lever in any position other than P or N → shift lever in P or N

      9 V or higher → 2.7 V or less

      Neutral SW/

      Clutch SW

      G82-5 (STAR) - Body ground*2

      Input/Output

      W - Body ground

      • Outputs voltage to the starter relay:

      • Outputs starter relay activation voltage (12 V) when engine is being started. Outputs for maximum of 30 seconds.

        Turns off when engine speed is 500 rpm or more for 500 ms or more.

      Tip:

      When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.

      With the clutch pedal depressed, the engine switch is pressed and held → After approx. 1 sec. has elapsed, the engine switch is released

      6 V or higher*3 →1.5 V or less

      -

      G82-5 (STAR) - Body ground*2

      Input/Output

      W - Body ground

      • Receives clutch start switch signal:

      • Monitors whether clutch start switch is on or off. Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

      • Perform the following operations except while the engine is cranking:

      • Clutch pedal released → Clutch pedal depressed

      9 V or higher → 2.7 V or less

      Neutral SW/ Clutch SW

      G82-16 (NE) - G82-11 (E)

      Input

      P - BR

      Engine speed signal

      Idling (engine warmed up)

      Pulse generation (See waveform 1)

      Engine Condition

      G82-9 (IG2D) - G82-11 (E)

      Output

      GR - BR

      IG2 signal

      Engine switch on (ACC) → Engine switch on (IG)

      1 V or less → 9 V or higher

      IG2 Relay Monitor (Outside)

      G82-18 (STP1) - G82-11 (E)*1

      Input

      L - BR

      Stop light switch signal

      Brake pedal released → Brake pedal depressed

      1 V or less → 9 V or higher

      Stop Light Switch1

      G84-26 (SLP) - G82-11 (E)

      Input

      B - BR

      Steering lock position signal

      Steering wheel locked → Steering wheel unlocked*4

      11 to 14 V → 1.2 V or less

      Steering Unlock Switch

      G84-29 (SLR+) - G82-11 (E)

      Output

      L - BR

      Steering lock motor operation command signal (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))

      Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped*5

      Pulse generation (See waveform 2)

      -

      G84-25 (P) - G82-11 (E)*1

      Input

      R - BR

      P position signal

      Shift lever in P → Shift lever not in P

      9 V or higher → 2.7 V or less

      Shift P Signal

      G84-30 (SSW2) - G82-11 (E)

      Input

      G - BR

      SSW2 contact signal

      Tip:

      Backup for SSW1. Behaves the same way as SSW1.

      Engine switch not pushed → Engine switch pushed

      9 V or higher → 1 V or less

      Start Switch2

      G84-28 (SSW1) - G82-11 (E)

      Input

      LG - BR

      SSW1 contact signal

      Engine switch not pushed → Engine switch pushed

      9 V or higher → 1 V or less

      Start Switch1

      G84-4 (ACCD) - G82-11 (E)

      Output

      R - BR

      ACC signal

      Engine switch off → Engine switch on (ACC)

      1 V or less → 8.5 V or higher

      ACC Relay Monitor

      G84-6 (IG1D) - G82-11 (E)

      Output

      P - BR

      IG1 signal

      Engine switch on (ACC) → Engine switch on (IG)

      1 V or less → 9 V or higher

      IG1 Relay Monitor (Outside)

      G84-27 (SPD) - G82-11 (E)

      Input

      G - BR

      Vehicle speed signal

      Vehicle being driven at approx. 5 km/h (3 mph)

      Pulse generation (See waveform 3)

      Vehicle Speed Signal

      *1: except Manual Transaxle

      *2: for Manual Transaxle

      Tip:

      • *3: While the engine is cranking, the battery voltage may drop to approximately 6 V.

      • *4: When the engine switch is turned off with the shift lever in P (except Manual Transaxle) and any of the doors are opened or closed, the steering wheel will be locked. When the engine switch is turned on (ACC) or on (IG), the steering wheel will be unlocked.

      • *5: When all of the following conditions are met, open any of the doors to operate the steering lock motor.

        • The shift lever is in P (except Manual Transaxle).

        • While carrying the electrical key transmitter sub-assembly, the engine switch is turned on (IG) and the steering is unlocked.

        • The engine switch is off.

    5. Using an oscilloscope, check the waveform of the ECU.

      Tip:

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      1. C222647E01

        Waveform 1

        Item

        Content

        Tester Connection

        G82-16 (NE) - G82-11 (E)

        Tool Setting

        2 V/DIV., 2 ms./DIV.

        Vehicle Condition

        Idling (engine warmed up)
        Tip:

        The wavelength becomes shorter as the engine speed increases.

      2. C221561C32

        *a

        Steering lock motor not operating

        *b

        Steering lock motor operating

        Waveform 2

        Item

        Content

        Tester Connection

        G84-29 (SLR+) - G82-11 (E)

        Tool Setting

        2 V/DIV., 200 ms./DIV.

        Vehicle Condition

        Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped*
        Tip:

        *: When all of the following conditions are met, open any of the doors to operate the steering lock motor.

        • The engine switch is off.

        • The shift lever is in P (except Manual Transaxle).

        • While carrying the electrical key transmitter sub-assembly, the engine switch is turned on (IG) and the steering is unlocked.

      3. B220145E01

        Waveform 3

        Item

        Content

        Tester Connection

        G84-27 (SPD) - G82-11 (E)

        Tool Setting

        5 V/DIV., 20 ms./DIV.

        Vehicle Condition

        Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)
        Tip:

        The wavelength becomes shorter as the vehicle speed increases.

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

    Click here

  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    Click here