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

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B264892N44

    1. Disconnect the E35 and E33 certification ECU (smart key ECU assembly) 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

      E33-7 (STA) - Body ground

      Input

      LG - 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)

      93.75 to 136.36 Ω

      -

      E33-5 (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 → 93.75 to 136.36 Ω

      -

      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 → 93.75 to 136.36 Ω

      Neutral SW/ Clutch SW

      E33-5 (STAR) - Body ground*2

      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 N → shift lever in N (at 20°C (68°F))

      10 kΩ or higher → 93.75 to 136.36 Ω

      -

      Receives neutral position switch (N position detection) signal

      • Monitors whether the neutral start switch is on (N) or off (other than N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral position 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 position switch is off, the voltage will be high (9 V 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.

      Perform the following operations except while the engine is cranking:

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

      30 kΩ or higher → 93.75 to 136.36 Ω

      Neutral SW/ Clutch SW

      E33-5 (STAR) - Body ground*3

      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.)

      Clutch pedal released → Clutch pedal depressed

      10 kΩ or higher → 93.75 to 136.36 Ω

      -

      Receives clutch start switch signal

      • Monitors whether the clutch start switch is on (clutch pedal depressed) or off (clutch pedal released). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the clutch 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 clutch 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 → 93.75 to 136.36 Ω

      Neutral SW/ Clutch SW

      E33-16 (NE) - Body ground

      Input

      L - Body ground

      Engine speed signal

      Always

      10 kΩ or higher

      Engine Condition

      E33-9 (IG2D) - Body ground

      Output

      GR - Body ground

      IG2 signal

      20°C (68°F)

      77 to 126 Ω

      IG2 Relay Monitor(Outside)

      E33-18 (STP1) - Body ground

      Input

      L - Body ground

      Stop light switch signal

      Brake pedal depressed → Brake pedal released

      9 V or higher → 1 V or less

      Stop Light Switch1

      E33-2 (+B) - E33-11 (E)

      Input

      L - W-B

      Power source

      Always

      11 to 14 V

      -

      E35-26 (SLP) - E33-11 (E)

      Input

      G - W-B

      Steering lock position signal

      Always

      10 kΩ or higher

      Steering Unlock Switch

      E33-11 (E) - Body ground

      -

      W-B - Body ground

      GND

      Always

      Below 1 Ω

      -

      E35-30 (SSW2) - Body ground

      Input

      B - 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

      E35-28 (SSW1) - Body ground

      Input

      SB - Body ground

      SSW1 contact signal

      Engine switch pushed → Engine switch not pushed

      Below 1 Ω → 10 kΩ or higher

      Start Switch1

      E35-4 (ACCD) - Body ground

      Output

      B - Body ground

      ACC signal

      20°C (68°F)

      163 to 238 Ω

      ACC Relay Monitor

      E35-6 (IG1D) - Body ground

      Output

      G - Body ground

      IG1 signal

      20°C (68°F)

      54.32 to 79.32 Ω

      IG1 Relay Monitor(Outside)

      E33-10 (CUTB) - E33-11 (E)

      Input

      LG - W-B

      Dark current cut pin*4

      Always

      11 to 14 V

      -

      E35-27 (SPD) - Body ground

      Input

      V - Body ground

      Vehicle speed signal

      Always

      30 kΩ or higher

      Vehicle Speed Signal

      • *1: for CVT

      • *2: for Multi-Mode Manual Transaxle

      • *3: for Manual Transaxle

      • *4: 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 E35 and E33 certification ECU (smart key ECU assembly) 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

      E33-7 (STA) - E33-11 (E)

      Input

      LG - W-B

      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)*1,*2

      6 V or higher*4 → 1.5 V or less

      -

      With the clutch pedal depressed, the engine switch is pressed and held (starter on) → After approx. 1 sec. has elapsed, the engine switch is released (starter off)*3

      E33-5 (STAR) - E33-11 (E)*1

      Input/Output

      W - W-B

      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*4 → 1.5 V or less

      -

      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))

      9 V or higher → 2.7 V or less

      Neutral SW/ Clutch SW

      E33-5 (STAR) - E33-11 (E)*2

      Input/Output

      W - W-B

      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*4 → 1.5 V or less

      -

      Receives neutral start switch (N position detection) signal

      • Monitors whether the neutral position switch is on (N) or off (other than N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral position 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 position 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 N → shift lever in N (at 20°C (68°F))

      9 V or higher → 2.7 V or less

      Neutral SW/ Clutch SW

      E33-5 (STAR) - E33-11 (E)*3

      Input/Output

      W - W-B

      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 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*4 → 1.5 V or less

      -

      Receives clutch start switch signal

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

      E33-16 (NE) - E33-11 (E)

      Input

      L - W-B

      Engine speed signal

      Idling (engine warmed up)

      Pulse generation

      (See waveform 1)

      Engine Condition

      E33-9 (IG2D) - E33-11 (E)

      Output

      GR - W-B

      IG2 signal

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

      1 V or less → 9 V or higher

      IG2 Relay Monitor(Outside)

      E33-18 (STP1) - E33-11 (E)

      Input

      L - W-B

      Stop light switch signal

      Brake pedal released → Brake pedal depressed

      1 V or less → 9 V or higher

      Stop Light Switch1

      E35-26 (SLP) - E33-11 (E)

      Input

      G - W-B

      Steering lock position signal

      Steering wheel locked → Steering wheel unlocked*5

      11 to 14 V → 1.2 V or less

      Steering Unlock Switch

      E35-29 (SLR+) - E33-11 (E)

      Output

      P - W-B

      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*6

      Pulse generation

      (See waveform 2)

      -

      E35-25 (P) - E33-11 (E)*1

      Input

      R - W-B

      P position signal

      Shift lever in P → Shift lever not in P

      9 V or higher → 1.5 V or less

      Shift P Signal

      E35-30 (SSW2) - E33-11 (E)

      Input

      B - W-B

      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

      E35-28 (SSW1) - E33-11 (E)

      Input

      SB - W-B

      SSW1 contact signal

      Engine switch not pushed → Engine switch pushed

      9 V or higher → 1 V or less

      Start Switch1

      E35-4 (ACCD) - E33-11 (E)

      Output

      B - W-B

      ACC signal

      Engine switch off → Engine switch on (ACC)

      1 V or less → 8.5 V or higher

      ACC Relay Monitor

      E35-6 (IG1D) - E33-11 (E)

      Output

      G - W-B

      IG1 signal

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

      1 V or less → 9 V or higher

      IG1 Relay Monitor(Outside)

      E35-27 (SPD) - E33-11 (E)

      Input

      V - W-B

      Vehicle speed signal

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

      Pulse generation

      (See waveform 3)

      Vehicle Speed Signal
      Tip:

      • *1: for CVT

      • *2: for Multi-Mode Manual Transaxle

      • *3: for Manual Transaxle

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

      • *5: When the engine switch is turned off with the shift lever in P (for CVT) 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.

      • *6: 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 (for CVT).

        • The engine switch is off.

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

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

      1. C222647E03

        Waveform 1

        Item

        Content

        Tester Connection

        E33-16 (NE) - E33-11 (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. C221561C22

        *a

        Steering lock motor not operating

        *b

        Steering lock motor operating

        Waveform 2

        Item

        Content

        Tester Connection

        E35-29 (SLR+) - E33-11 (E)

        Tool Setting

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

        Vehicle Condition

        Steering lock motor stopped →

        Steering lock motor operating →

        Steering lock motor stopped*1
        Tip:

        *1: 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 (for CVT) or N (for Multi-Mode 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.

      3. B220145E01

        Waveform 3

        Item

        Content

        Tester Connection

        E35-27 (SPD) - E33-11 (E)

        Tool Setting

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

        Vehicle Condition

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

        The wavelength becomes shorter as the vehicle speed increases.