PUSH-BUTTON START TERMINALS OF ECU


  1. CHECK POWER MANAGEMENT CONTROL ECU

    A01FQJUE64

    1. Disconnect the A36, N91 and N92 connectors.

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

      Tech Tips

      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
      A36-2 (IG2D) - Body ground Output L - Body ground IG2 signal 20°C (68°F) 500 to 750 Ω IG2 Relay Monitor(Outside)
      N92-10 (STP) - 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
      N91-1 (AM22) - Body ground Input P - Body ground Power source Power switch off 11 to 14 V -
      N92-7 (AM21) - Body ground Input P - Body ground Power source Power switch off 11 to 14 V -
      N92-12 (SLP) - Body ground Input L - Body ground Steering lock position signal Always 10 kΩ or higher Steering Unlock Switch
      N92-14 (P2) - Body ground Input G - Body ground P position signal Always 40 kΩ or higher → 200 Ω or less Shift P Signal
      N91-5 (E01) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N92-5 (E02) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N91-6 (E1) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N92-4 (E12) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N92-17 (SSW2) - Body ground Input G - Body ground

      SSW2 contact signal

      Tech Tips

      Backup for SSW1. Behaves the same way as SSW1.

      		 Power switch pushed → Power switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch2
      N91-7 (SSW1) - Body ground Input V - Body ground SSW1 contact signal Power switch pushed → Power switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch1
      N92-2 (IG1D) - Body ground Output B - Body ground IG1 signal 20°C (68°F) 45.45 to 68.18 Ω IG1 Relay Monitor(Outside)
      N92-1 (ACCD) - Body ground Output B - Body ground ACC signal 20°C (68°F) 181.81 to 272.72 Ω ACC Relay Monitor
      N91-16 (SPDI) - N91-6 (E1) Input SB - W-B Vehicle speed signal Always 30 kΩ or higher Vehicle Speed Signal

    3. Reconnect the A36, N91 and N92 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
      A36-2 (IG2D) - N91-6 (E1) Output L - W-B IG2 signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG2 Relay Monitor(Outside)
      N92-12 (SLP) - N91-6 (E1) Input L - W-B Steering lock position signal Steering wheel locked → Steering wheel unlocked*1 11 to 14 V → 1.2 V or less Steering Unlock Switch
      N92-6 (SLR+) - N91-6 (E1) Output G - 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*2 Pulse generation (See waveform 1) -
      N92-14 (P2) - N91-6 (E1) Input G - W-B P position signal Shift lever in P → Shift lever not in P 9 V or higher → 2.7 V or less Shift P Signal
      N92-17 (SSW2) - N91-6 (E1) Input G - W-B

      SSW2 contact signal

      Tech Tips

      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
      N91-7 (SSW1) - N91-6 (E1) Input V - W-B SSW1 contact signal Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch1
      N92-1 (ACCD) - N91-6 (E1) Output B - W-B ACC signal Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher ACC Relay Monitor
      N92-2 (IG1D) - N91-6 (E1) Output B - W-B IG1 signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG1 Relay Monitor(Outside)
      N91-16 (SPDI) - N91-6 (E1) Input SB - W-B Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph)

      Pulse generation

      (See waveform 2)

      		 Vehicle Speed Signal

      Tech Tips


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

      • *2: 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.

        • The power switch is off.

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

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

      Tech Tips

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


      1. A01FR4NE01
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 1

        Item Content
        Tester Connection N92-6 (SLR+) - N91-6 (E1)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition

        Steering lock motor stopped →

        Steering lock motor operating →

        Steering lock motor stopped*

        Tech Tips

        *: 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.

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

        • The power switch is off.

      2. A01FVDYE01

        Waveform 2

        Item Content
        Tester Connection N91-16 (SPDI) - N91-6 (E1)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Vehicle Condition Power switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

        Tech Tips

        The wavelength becomes shorter as the vehicle speed increases.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A01FTANE28

    1. Disconnect the N94, N95 and N98 certification ECU (smart key ECU assembly) connectors.

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

      Tech Tips

      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
      N94-1 (E) - Body ground - W-B - Body ground Ground Always Below 1 Ω -
      N95-5 (+B) - N94-1 (E) Input GR - W-B +B power supply Always 11 to 14 V -
      N95-4 (CUTB) - N94-1 (E) Input P - W-B Dark current cut pin* Always 11 to 14 V -

      • *: In order to prevent the vehicle auxiliary 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 auxiliary 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).

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

    3. Reconnect the N94, N95 and N98 certification ECU (smart key ECU assembly) connectors.

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

      Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      N94-11 (CLG5) - N94-1 (E) Output GR - W-B Output to No. 1 indoor electrical key antenna assembly (front floor)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 Pulse generation (See waveform 1) Over Head + Front Room (key diagnostic mode)
      N94-10 (CG5B) - N94-1 (E) Output B - W-B Output to No. 1 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. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 Pulse generation (See waveform 1) Over Head + Front Room (key diagnostic mode)
      N98-14 (CLG6) - N94-1 (E) Output Y - W-B Output to No. 2 indoor electrical key antenna assembly (rear floor)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 Pulse generation (See waveform 1) Over Head + Rear Room (key diagnostic mode)
      N98-5 (CG6B) - N94-1 (E) Output L - W-B Output to No. 2 indoor electrical key antenna assembly (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. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 Pulse generation (See waveform 1) Over Head + Rear Room (key diagnostic mode)
      N98-4 (CLG7) - N94-1 (E) Output P - W-B Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. All doors closed

      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 2) Over Head + Luggage (inside) (key diagnostic mode)
      N98-3 (CG7B) - N94-1 (E) Output W - W-B Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. All doors closed

      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 2) Over Head + Luggage (inside) (key diagnostic mode)
      N98-15 (RCO) - N94-1 (E) Output

      G - W-B*1

      LG - W-B*2

      Output to door control receiver

      (Power supply for door control receiver. 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 vehicle

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

      		 Pulse generation (See waveform 3) -
      N98-6 (RDAM) - N94-1 (E) Input R - W-B Door control receiver verifies data received from electrical key transmitter sub-assembly. Door control receiver sends data to ECU and intermittently grounds 12 V signal from certification ECU (smart key ECU assembly).

      Procedure:


      1. Power switch off

      2. All doors locked

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

      		 Pulse generation (See waveform 4) -
      N98-7 (CSEL) - N94-1 (E) Output P - W-B Communication channel switching circuit.

      Procedure:


      1. Power switch off

      2. All doors closed

      		 Below 1 V → 4.5 to 6 V → Below 1 V Key diagnostic mode

      • *1: for LHD

      • *2: for RHD

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

      Tech Tips

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


      1. A01FUMRE01
        Text in Illustration
        *a Door open
        *b After approximately 30 seconds from when the door is closed

        Waveform 1

        Item Content
        Tester Connection

        • N94-11 (CLG5) - N94-1 (E)

        • N94-10 (CG5B) - N94-1 (E)

        • N98-14 (CLG6) - N94-1 (E)

        • N98-5 (CG6B) - N94-1 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Vehicle Condition

        Procedure:


        1. Power switch off

        2. Electrical key transmitter sub-assembly not inside vehicle

        3. Door is open

        4. Door is closed

        5. Within 30 seconds
      2. A01FQFQE01
        Text in Illustration
        *a Luggage compartment door opened
        *b Luggage compartment door closed

        Waveform 2

        Item Content
        Tester Connection

        • N98-4 (CLG7) - N94-1 (E)

        • N98-3 (CG7B) - N94-1 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Vehicle Condition

        Procedure:


        1. Power switch off

        2. Electrical key transmitter sub-assembly not inside vehicle

        3. All doors closed

        4. Luggage compartment door closed
      3. A01FQSNE01
        Text in Illustration
        *a Before lock or unlock switches of electrical key transmitter sub-assembly pressed
        *b After lock or unlock switches of electrical key transmitter sub-assembly pressed

        Waveform 3

        Item Content
        Tester Connection N98-15 (RCO) - N94-1 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Vehicle Condition

        Procedure:


        1. Power switch off

        2. Electrical key transmitter sub-assembly brought outside vehicle

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

        4. Lock or unlock switches of electrical key transmitter sub-assembly not pressed → pressed
      4. A01FTKKE01
        Text in Illustration
        *a Before lock or unlock switches of electrical key transmitter sub-assembly pressed
        *b After lock or unlock switches of electrical key transmitter sub-assembly pressed

        Waveform 4

        Item Content
        Tester Connection N98-6 (RDAM) - N94-1 (E)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Vehicle Condition

        Procedure:


        1. Power switch off

        2. All doors locked

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

        4. Lock or unlock switches of electrical key transmitter sub-assembly not pressed → pressed

  3. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

  4. CHECK ID CODE BOX (IMMOBILISER CODE ECU) Click here

  5. CHECK POWER SWITCH Click here