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PUSH-BUTTON START TERMINALS OF ECU

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  1. A01MT64N01

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the K137 and A83 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
      A83-2 (STP1) - Body ground Input R - Body ground Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Stop Light Switch1
      K137-10 (+B) - K137-11 (E) Input BE - BR Power source Power switch off 11 to 14 V -
      K137-23 (SLP) - K137-11 (E) Input R - BR Steering lock position signal Steering locked 10 kΩ or higher Steering Unlock Switch
      K137-22 (P) - K137-11 (E) Input LG - BR P position signal Shift lever in P → Shift lever not in P 30 kΩ or higher → Below 200 Ω Shift P Signal
      K137-11 (E) - Body ground - BR - Body ground GND Always Below 1 Ω -
      K137-18 (SSW2) - Body ground Input L - Body ground

      SSW2 contact signal

      Tip:

      Backup for SSW1. Behaves the same way as SSW1.

      		 Power switch pushed → Power switch not pushed Below 15 Ω → 10 kΩ or higher Start Switch2
      K137-16 (SSW1) - Body ground Input GR - Body ground SSW1 contact signal Power switch pushed → Power switch not pushed Below 15 Ω → 10 kΩ or higher Start Switch1
      K137-9 (ACCD) - Body ground Output P - Body ground ACC signal 20°C (68°F) 130.92 to 190.74 Ω ACC Relay Monitor
      A83-3 (IG1D) - Body ground Output V - Body ground IG signal 20°C (68°F) 87.32 to 127.14 Ω IG Relay Monitor (Outside)
      K137-5 (SPD) - Body ground Input L - Body ground Vehicle speed signal Always 30 kΩ or higher Vehicle Speed Signal

    3. Reconnect the K137 and A83 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
      A83-2 (STP1) - K137-11 (E) Input R - BR Stop light switch signal Brake pedal released → Brake pedal depressed 1 V or less → 9 V or higher Stop Light Switch1
      K137-23 (SLP) - K137-11 (E) Input R - BR Steering lock position signal Steering locked → Steering unlocked 11 to 14 V → 1.5 V or less Steering Unlock Switch
      K137-24 (SLR+) - K137-11 (E) Output W - BR

      Steering lock motor operation command signal

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

      When a door is opened, the steering lock motor will be operated if all of the following conditions are met:


      • The steering is unlocked.

      • The power switch is off.

      • The shift lever is in P.

      Pulse generation

      (See waveform 1)

      		 -
      K137-22 (P) - K137-11 (E) Input LG - BR P position signal Shift lever in P → Shift lever not in P 9 V or higher → 2.76 V or less Shift P Signal
      K137-18 (SSW2) - K137-11 (E) Input L - BR

      SSW2 contact signal

      Tip:

      Backup for SSW1. Behaves the same way as SSW1.

      		 Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch2
      K137-16 (SSW1) - K137-11 (E) Input GR - BR SSW1 contact signal Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch1
      K137-9 (ACCD) - K137-11 (E) Output P - BR ACC signal Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher ACC Relay Monitor
      A83-3 (IG1D) - K137-11 (E) Output V - BR IG signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG Relay Monitor (Outside)
      K137-5 (SPD) - K137-11 (E) Input L - BR Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph)

      Pulse generation

      (See waveform 2)

      		 Vehicle Speed Signal
      A83-12 (ST2) - K137-11 (E) Output L - BR STSW signal With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released 9 V or higher → 1 V or less -
      K137-21 (CLG5) - K137-11 (E) Output B - BR Output to No. 2 indoor electrical key antenna assembly (front floor)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door using the door outside handle

      Pulse generation

      (See waveform 3)

      		 Overhead + Front Room (key diagnostic mode)
      K137-20 (CG5B) - K137-11 (E) Output V - BR Output to No. 2 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door using the door outside handle

      Pulse generation

      (See waveform 3)

      		 Overhead + Front Room (key diagnostic mode)
      K7-15 (CLG6) - K137-11 (E) Output LG - BR Output to indoor electrical key antenna (rear floor)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door using the door outside handle

      Pulse generation

      (See waveform 3)

      		 Overhead + Rear Room (key diagnostic mode)
      K136-14 (CG6B) - K137-11 (E) Output BE - BR Output to indoor electrical key antenna (rear floor) (terminal on opposite side of component from CLG6 output terminal)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door using the door outside handle

      Pulse generation

      (See waveform 3)

      		 Overhead + Rear Room (key diagnostic mode)
      K136-4 (CLG7) - K137-11 (E) Output SB - BR Output to No. 1 indoor electrical key antenna assembly (inside luggage)

      Procedure:


      1. Door is closed

      2. Power switch off

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Luggage compartment door closed

      Note:

      In order to prevent the electrical key transmitter sub-assembly from being locked inside the vehicle, perform this inspection with the window of a door open.

      If the electrical key transmitter sub-assembly is in any of the following locations, the key lock-in prevention function may not operate:


      • Near the spare tire or at the edge of the luggage compartment.

      • In a metal bag or near a metal object.

      Pulse generation

      (See waveform 4)

      		 Luggage + Luggage (inside) (key diagnostic mode)
      K136-3 (CG7B) - K137-11 (E) Output P - BR Output to No. 1 indoor electrical key antenna assembly (inside luggage) (terminal on opposite side of component from CLG7 output terminal)

      Procedure:


      1. Door is closed

      2. Power switch off

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Luggage compartment door closed

      Note:

      In order to prevent the electrical key transmitter sub-assembly from being locked inside the vehicle, perform this inspection with the window of a door open.

      If the electrical key transmitter sub-assembly is in any of the following locations, the key lock-in prevention function may not operate:


      • Near the spare tire or at the edge of the luggage compartment.

      • In a metal bag or near a metal object.

      Pulse generation

      (See waveform 4)

      		 Luggage + Luggage (inside) (key diagnostic mode)
      K136-18 (RCO) - K137-11 (E) Output LG - BR

      Output to door control and tire pressure monitoring system receiver assembly

      (Power supply for door control and tire pressure monitoring system receiver assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 5)

      		 -
      K136-19 (CSEL) - K137-11 (E) Output B - BR Communication channel switching circuit

      Procedure:


      1. Power switch off

      2. All doors closed

      		 Below 1 V → pulse generation -
      K136-20 (RDAM) - K137-11 (E) Input R - BR

      Door control and tire pressure monitoring system receiver assembly verifies data received from electrical key transmitter sub-assembly.

      Door control and tire pressure monitoring system receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control and tire pressure monitoring system receiver assembly intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).

      Procedure:


      1. Power switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 6)

      		 -
      Tip:

      • The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.

      • The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:


        • To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the power switch on (ACC) or on (IG).

        • To lock the steering, open a door with the power switch off and the shift lever in P.

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

      Note:

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


      1. A01MU30C22
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1

        Item Content
        Tester Connection K137-24 (SLR+) - K137-11 (E)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped
      2. A01MSEUN12

        Waveform 2

        Item Content
        Tester Connection K137-5 (SPD) - K137-11 (E)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Vehicle being driven at approx. 5 km/h (3 mph)
        Tip:

        The wavelength becomes shorter as the vehicle speed increases.

      3. A01MRUZC02
        *a For 30 seconds after closing any door using the door outside handle
        *b 30 seconds or more have elapsed after closing any door using the door outside handle

        Waveform 3

        Item Content
        Tester Connection

        K137-21 (CLG5) - K137-11 (E)

        K137-20 (CG5B) - K137-11 (E)

        K136-15 (CLG6) - K137-11 (E)

        K136-14 (CG6B) - K137-11 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition

        Procedure:


        1. Power switch off

        2. Electrical key transmitter sub-assembly not inside vehicle

        3. Within 30 seconds of closing any door using the door outside handle
      4. A01MRM8C02
        *a Driver door lock sensor not touched
        *b Driver door lock sensor touched

        Waveform 4

        Item Content
        Tester Connection

        K136-4 (CLG7) - K137-11 (E)

        K136-3 (CG7B) - K137-11 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition

        Procedure:


        1. Door is closed

        2. Power switch off

        3. Electrical key transmitter sub-assembly not inside vehicle

        4. Driver door lock sensor touched
      5. A01MRV2C12
        *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
        *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

        Waveform 5

        Item Content
        Tester Connection K136-18 (RCO) - K137-11 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition

        Procedure:


        1. Power switch off

        2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

        3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed
      6. A01MSGQC12
        *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
        *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

        Waveform 6

        Item Content
        Tester Connection K136-20 (RDAM) - K137-11 (E)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition

        Procedure:


        1. Power switch off

        2. All doors locked

        3. Electrical key transmitter sub-assembly not inside vehicle

        4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

        5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

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

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  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

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  4. CHECK POWER SWITCH

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