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

for Preparation Click here


HINT:
  1. For the layout of the certification ECU (smart key ECU assembly) terminals, refer to the following (Click here).
  2. For the layout of the ID code box (immobiliser code ECU) terminals, refer to the following (Click here).


CHECK POWER MANAGEMENT CONTROL ECU

C146689E35

  1. Disconnect the A20, H3 and H4 connectors.

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

    Tester Connection
    		Input/Output
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    		Related Data List Item
    A20-2 (IG2D) - Body ground
    		Output
    		V - Body ground
    		IG2 signal
    		20°C (68°F)
    		131 to 230 Ω
    		IG2 Relay Monitor (Outside)
    A20-23 (STP) - 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
    H3-1 (AM22) - Body ground
    		Input
    		W - Body ground
    		+B power supply
    		Always
    		9.5 to 14 V
    		-
    H4-7 (AM21) - Body ground
    		Input
    		W - Body ground
    		+B power supply
    		Always
    		9.5 to 14 V
    		-
    H3-6 (E1) - Body ground
    		-
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    		-
    H4-4 (E12) - Body ground
    		-
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    		-
    H4-24 (CA1L) - Body ground
    		Input/Output
    		V - Body ground
    		CAN communication line
    		Always
    		10 kΩ or higher
    		-
    H4-25 (CA1H) - Body ground
    		Input/Output
    		P - Body ground
    		CAN communication line
    		Always
    		10 kΩ or higher
    		-
    H4-17 (SSW2) - Body ground
    		Input
    		Y - Body ground
    		SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)

    HINT:
    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
    H3-7 (SSW1) - Body ground
    		Input
    		B - Body ground
    		SSW1 contact signal
    		Power switch pushed → Power switch not pushed
    		Below 1 Ω → 10 kΩ or higher
    		Start Switch1
    H4-1 (ACCD) - Body ground
    		Output
    		G - Body ground
    		ACC signal
    		20°C (68°F)
    		81.49 to 118.98 Ω
    		ACC Relay Monitor
    H4-2 (IG1D) - Body ground
    		Output
    		B - Body ground
    		IG1 signal
    		20°C (68°F)
    		54.32 to 79.32 Ω
    		IG1 Relay Monitor (Outside)
    H4-11 (LIN2) - Body ground
    		Input/Output
    		B - Body ground
    		LIN communication line
    		Always
    		10 kΩ or higher
    		-
    If the result is not as specified, there may be a malfunction in the wire harness.

  3. Reconnect the A20, H3 and H4 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
    A20-2 (IG2D) - H3-6 (E1)
    		Output
    		V - W-B
    		IG2 signal
    		Power switch on (ACC) → Power switch on (IG)
    		1 V or less → 9 V or higher
    		IG2 Relay Monitor (Outside)
    H3-9 (INDW) - H3-6 (E1)
    		Output
    		G - W-B
    		Power switch indicator (orange) illumination output
    		Brake pedal released, park (P) selected, power switch on (ACC), or on (IG) → Other than previous condition
    		7 V or higher → 1 V or less
    		-
    A20-22 (PCON) - H3-6 (E1)
    		Output
    		LG - W-B
    		P position signal
    		Park (P) selected
    		Pulse generation
    (See waveform 1)
    		-
    A20-28 (PPOS) - H3-6 (E1)
    		Input
    		V - W-B
    		P position signal
    		Park (P) selected
    		Pulse generation
    (See waveform 1)
    		-
    H4-17 (SSW2) - H3-6 (E1)
    		Output
    		Y - W-B
    		SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)

    HINT:
    Backup for SSW1. Behaves the same way as SSW1.

    		Power switch pushed → Power switch not pushed
    		9 V or higher → 1 V or less
    		Start Switch2
    H3-7 (SSW1) - H3-6 (E1)
    		Output
    		B - W-B
    		Power switch signal
    		Power switch pushed → Power switch not pushed
    		9 V or higher → 1 V or less
    		Start Switch1
    H4-1 (ACCD) - H3-6 (E1)
    		Output
    		G - W-B
    		ACC signal
    		Power switch off → Power switch on (ACC)
    		1 V or less → 8.5 V or higher
    		ACC Relay Monitor
    H4-2 (IG1D) - H3-6 (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)
    H3-8 (INDS) - H3-6 (E1)
    		Output
    		R - W-B
    		Power switch indicator (green) illumination output
    		Brake pedal depressed, park (P) selected
    		7 V or higher
    		-
    H3-14 (SPDI) - H3-6 (E1)
    		Input
    		V - W-B
    		Vehicle speed signal
    		Power switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)
    		Pulse generation
    (See waveform 2)
    		Vehicle Speed Signal
    H4-20 (IMO) - H3-6 (E1)
    		Output
    		L - W-B
    		ID code box (immobiliser code ECU) communication input
    (Signal input from power management control ECU to ID code box (immobiliser code ECU))
    		Power switch off
    		11 to 14 V
    1. Engine Start Request
    2. EFI Code Receive
    Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected
    		Pulse generation
    (See waveform 3)
    H4-21 (IMI) - H3-6 (E1)
    		Input
    		R - W-B
    		ID code box (immobiliser code ECU) communication output
    (Signal output from ID code box (immobiliser code ECU) to power management control ECU)
    		Power switch off
    		11 to 14 V
    Power switch on (IG)
    		Pulse generation
    (See waveform 3)



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



      C236203E01

    1. Waveform 1
      Tester Connection
      		CH1: A20-22 (PCON) - H3-6 (E1)
      CH2: A20-28 (PPOS) - H3-6 (E1)
      Tool Setting
      		10 V/DIV., 10 ms/DIV.
      Vehicle Condition
      		Power switch on (IG)



      2. I042329E01

    2. Waveform 2
      Tester Connection
      		H3-14 (SPDI) - H3-6 (E1)
      Tool Setting
      		5 V/DIV., 10 ms/DIV.
      Vehicle Condition
      		Driving at approx. 20 km/h (12 mph)

      HINT:
      The wavelength becomes shorter as the vehicle speed increases.



    3. Waveform 1 (Reference)


      B253467E01


      Text in Illustration 
      *a
      		Approximately 160 ms
      		*b
      		Approximately 510 ms
      Measurement Condition 
      Item
      		Content
      Tester Connection
      		H4-20 (IMO) - H3-6 (E1)
      Tool Setting
      		2 V/DIV., 200 ms/DIV.
      Condition
      		Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected



    4. Waveform 2 (Reference)


      B253466E01


      Text in Illustration 
      *a
      		Approximately 160 ms
      		*b
      		Approximately 510 ms
      Measurement Condition 
      Item
      		Content
      Tester Connection
      		H4-21 (IMI) - H3-6 (E1)
      Tool Setting
      		2 V/DIV., 200 ms/DIV.
      Condition
      		Power switch on (IG)