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

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CHECK POWER MANAGEMENT CONTROL ECU OR POWER SOURCE CONTROL ECU

C185499E06


Text in Illustration 
*1
for 1KR-FE and 1NR-FE
*2
for 1ND-TV

  1. Disconnect the power management control ECU or power source control ECU connectors.

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

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


    Power Management Control ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D36-4 (NE) - Body ground
    		P - Body ground
    		ECM
    		Always
    		10 kΩ or higher
    D38-1 (AM22) - Body ground
    		L - Body ground
    		Battery power
    		Always
    		11 to 14 V
    D38-2 (AM21) - Body ground
    		R - Body ground
    		Battery power
    		Always
    		11 to 14 V
    D38-3 (SLP) - Body ground
    		BR - Body ground
    		Steering lock actuator
    (Steering lock ECU)
    		Always
    		10 kΩ or higher
    D38-5 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    D38-6 (GND) - Body ground
    		W-B - Body ground
    		 Ground
    		Always
    		Below 1 Ω
    D38-8 (SLR+) - Body ground
    		GR - Body ground
    		Steering lock actuator
    (Steering lock ECU)
    		Always
    		10 kΩ or higher
    D38-11 (CA3N) - Body ground
    		W - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D38-12 (CA3P) - Body ground
    		B - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D38-13 (CA1L) - Body ground
    		W - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D38-14 (CA1H) - Body ground
    		L - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D38-17 (SSW2) - Body ground
    		P - Body ground
    		Engine switch
    		Engine switch pushed
    		Below 1 Ω
    Engine switch not pushed
    		10 kΩ or higher
    D38-18 (SSW1) - Body ground
    		V - Body ground
    		Engine switch
    		Engine switch pushed
    		Below 1 Ω
    Engine switch not pushed
    		10 kΩ or higher
    D38-23 (SPD) - Body ground
    		V - Body ground
    		Combination meter assembly
    		Always
    		10 kΩ or higher
    D38-24 (LIN2) - Body ground
    		P - Body ground
    		LIN line
    		Always
    		10 kΩ or higher

    Power Source Control ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D72-4 (NE) - Body ground
    		P - Body ground
    		ECM
    		Always
    		10 kΩ or higher
    D73-1 (AM22) - Body ground
    		L - Body ground
    		Battery power
    		Always
    		11 to 14 V
    D73-2 (AM21) - Body ground
    		R - Body ground
    		Battery power
    		Always
    		11 to 14 V
    D73-3 (SLP) - Body ground
    		BR - Body ground
    		Steering lock actuator
    (Steering lock ECU)
    		Always
    		10 kΩ or higher
    D73-5 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    D73-6 (GND) - Body ground
    		W-B - Body ground
    		 Ground
    		Always
    		Below 1 Ω
    D73-8 (SLR+) - Body ground
    		GR - Body ground
    		Steering lock actuator
    (Steering lock ECU)
    		Always
    		10 kΩ or higher
    D73-11 (CA3N) - Body ground
    		W - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D73-12 (CA3P) - Body ground
    		B - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D73-13 (CA1L) - Body ground
    		W - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D73-14 (CA1H) - Body ground
    		L - Body ground
    		CAN line
    		Always
    		10 kΩ or higher
    D73-17 (SSW2) - Body ground
    		P - Body ground
    		Engine switch
    		Engine switch pushed
    		Below 1 Ω
    Engine switch not pushed
    		10 kΩ or higher
    D73-18 (SSW1) - Body ground
    		V - Body ground
    		Engine switch
    		Engine switch pushed
    		Below 1 Ω
    Engine switch not pushed
    		10 kΩ or higher
    D73-23 (SPD) - Body ground
    		V - Body ground
    		Combination meter assembly
    		Always
    		10 kΩ or higher
    D73-24 (LIN2) - Body ground
    		P - Body ground
    		LIN 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 power management control ECU or power source control ECU connectors.

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

    Power Management Control ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D36-2 (STA) - D38-6 (GND)
    		L - W-B
    		ST relay
    		Cranking
    		6.0 V or more
    D36-3 (STAR) - D38-6 (GND)
    		V - W-B
    		ST relay
    		Shift lever in P or N
    		Below 1 V
    D36-4 (NE) - D38-6 (GND)
    		P - W-B
    		ECM
    		Engine running
    		Pulse generation
    D36-8 (IG2D) - D38-6 (GND)
    		R - W-B
    		IG2 relay
    		Engine switch on (IG)
    		8 to 14 V
    Engine switch on (ACC)
    		Below 1 V
    D36-11 (STP1) D38-6 (GND)
    		BR - W-B
    		Stop light switch assembly
    		Brake pedal depressed
    		8 to 14 V
    Brake pedal released
    		Below 1 V
    D38-3 (SLP) - D38-6 (GND)
    		BR - W-B
    		Steering lock actuator
    (Steering lock ECU)
    		Steering lock locked
    		8 to 14 V
    Steering lock released
    		Below 1.2 V
    D38-8 (SLR+) - D38-6 (GND)
    		GR - W-B
    		Steering lock actuator
    (Steering lock ECU)
    		Steering lock actuator
    		Below 1 V
    Steering lock actuator
    		8 to 14 V
    D38-10 (INDW) - D38-6 (GND)
    		G - W-B
    		Engine switch
    		Brake pedal released, shift lever in P, engine switch on (ACC, IG)
    		8 to 14 V
    D38-16 (P)* - D38-6 (GND)
    		R - W-B
    		Steering lock control unit assembly
    		Shift lever in P
    		8 to 14 V
    Shift lever not in P
    		Below 1 V
    D38-17 (SSW2) - D38-6 (GND)
    		P - W-B
    		Engine switch
    		Engine switch not pushed
    		8 to 14 V
    Engine switch pushed
    		Below 1 V
    D38-18 (SSW1) - D38-6 (GND)
    		V - W-B
    		Engine switch
    		Engine switch not pushed
    		8 to 14 V
    Engine switch pushed
    		Below 1 V
    D38-19 (ACCD) - D38-6 (GND)
    		B - W-B
    		ACC relay
    		Engine switch off
    		Below 1 V
    Engine switch on (ACC)
    		8 to 14 V
    D38-20 (IG1D) - D38-6 (GND)
    		LG - W-B
    		Instrument panel junction block assembly
    		Engine switch on (ACC)
    		Below 1 V
    Engine switch on (IG)
    		8 to 14 V
    D38-22 (INDS) - D38-6 (GND)
    		Y - W-B
    		Engine switch
    		Brake pedal depressed, shift lever in P
    		8 to 14 V
    D38-23 (SPD) - D38-6 (GND)
    		V - W-B
    		Combination meter assembly
    		Driving at approx. 5 km/h (3 mph)
    		Pulse generation
    (See waveform 1)
    *: for Continuously Variable Transaxle

    Power Source Control ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D72-2 (STA) - D73-6 (GND)
    		L - W-B
    		ST relay
    		Cranking
    		6.0 V or more
    D72-3 (STAR) - D73-6 (GND)
    		V - W-B
    		ST relay
    		Shift lever in P or N
    		Below 2 V
    D72-4 (NE) - D73-6 (GND)
    		P - W-B
    		ECM
    		Engine running
    		Pulse generation
    D72-8 (IG2D) - D73-6 (GND)
    		R - W-B
    		IG2 relay
    		Engine switch on (IG)
    		9 to 14 V
    Engine switch on (ACC)
    		Below 1 V
    D72-11 (STP1) D73-6 (GND)
    		BR - W-B
    		Stop light switch assembly
    		Brake pedal depressed
    		9 to 14 V
    Brake pedal released
    		Below 1 V
    D73-3 (SLP) - D73-6 (GND)
    		BR - W-B
    		Steering lock actuator
    (Steering lock ECU)
    		Steering lock locked
    		11 to 14 V
    Steering lock released
    		Below 1.2 V
    D73-8 (SLR+) - D73-6 (GND)
    		GR - W-B
    		Steering lock actuator
    (Steering lock ECU)
    		Steering lock actuator
    		Below 1 V
    Steering lock actuator
    		11 to 14 V
    D73-10 (INDW) - D73-6 (GND)
    		G - W-B
    		Engine switch
    		Brake pedal released, shift lever in P, engine switch on (ACC, IG)
    		7 to 14 V
    D73-16 (P)* - D73-6 (GND)
    		R - W-B
    		Shift lock control unit assembly
    		Shift lever in P
    		11 to 14 V
    Shift lever not in P
    		Below 1.5 V
    D73-17 (SSW2) - D73-6 (GND)
    		P - W-B
    		Engine switch
    		Engine switch not pushed
    		11 to 14 V
    Engine switch pushed
    		Below 1 V
    D73-18 (SSW1) - D73-6 (GND)
    		V - W-B
    		Engine switch
    		Engine switch not pushed
    		11 to 14 V
    Engine switch pushed
    		Below 1 V
    D73-19 (ACCD) - D73-6 (GND)
    		B - W-B
    		ACC relay
    		Engine switch off
    		Below 1 V
    Engine switch on (ACC)
    		9 to 14 V
    D73-20 (IG1D) - D73-6 (GND)
    		LG - W-B
    		Instrument panel junction block assembly
    		Engine switch on (ACC)
    		Below 1 V
    Engine switch on (IG)
    		9 to 14 V
    D73-22 (INDS) - D73-6 (GND)
    		L - W-B
    		Engine switch
    		Brake pedal depressed, shift lever in P
    		7 to 14 V
    D73-23 (SPD) - D73-6 (GND)
    		V - W-B
    		Combination meter assembly
    		Driving at approx. 5 km/h (3 mph)
    		Pulse generation
    (See waveform 2)
    *: for Continuously Variable Transaxle

    HINT:
    If the result is not as specified, the ECU may have a malfunction.



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



      C192841E01

    1. Power management control ECU
      Waveform 1 (SPD) 
      Tester Connection
      		Tool Setting
      		Vehicle Condition
      		Specified Condition
      D38-23 (SPD) - D38-6 (GND)
      		5 V/DIV., 10 ms./DIV.
      		Driving at approx. 5 km/h (3 mph)
      		Correct waveform as shown in illustration

      HINT:
      As the engine speed increases, the wavelength shortens.



      2. C192841E01

    2. Power source control ECU
      Waveform 2 (SPD) 
      Tester Connection
      		Tool Setting
      		Vehicle Condition
      		Specified Condition
      D73-23 (SPD) - D73-6 (GND)
      		5 V/DIV., 10 ms./DIV.
      		Driving at approx. 5 km/h (3 mph)
      		Correct waveform as shown in illustration

      HINT:
      As the engine speed increases, the wavelength shortens.


CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B197893E07

  1. Disconnect the D34 ECU connector.

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

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


    Certification ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D34-1 (+B) - Body ground
    		B - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    D34-29 (LIN) - Body ground
    		L - Body ground
    		LIN line
    		Always
    		10 kΩ or higher
    D34-15 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the wire harness.


CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

B118684E24

  1. Disconnect the D33 ECU connector.

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

    Steering Lock ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D33-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    D33-6 (IG2) - Body ground
    		L - Body ground
    		Power supply
    		Engine switch on (IG)
    		11 to 14 V
    D33-6 (IG2) - Body ground
    		L - Body ground
    		Power supply
    		Engine switch off
    		Below 1 V
    D33-7 (B) - Body ground
    		P - Body ground
    		+B power supply
    		Always
    		11 to 14 V

    1. If the result is not as specified, there may be a malfunction in the wire harness.

  3. Reconnect the D33 ECU connector.

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

    Steering Lock ECU 
    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    D33-4 (SLP1) - D33-1 (GND)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering is locked
    		11 to 14 V
    D33-4 (SLP1) - D33-1 (GND)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering is released
    		Below 1 V
    If the result is not as specified, the ECU may have a malfunction.