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CHECK MAIN BODY ECU

B154091E01

  1. Disconnect the A68, L13 and DA main body ECU connectors.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L13-6 (AM1) - Body ground
    		W - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    L12-1 (AM2) - Body ground
    		W - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    L13-17 (SSW1) - Body ground
    		W - Body ground
    		Engine switch 1 input
    		Engine switch pushed
    		Below 1 Ω
    L13-17 (SSW1) - Body ground
    		W - Body ground
    		Engine switch 1 input
    		Engine switch not pushed
    		10 kΩ or higher
    L13-16 (SSW2) - Body ground
    		L - Body ground
    		Engine switch 2 input
    		Engine switch pushed
    		Below 1 Ω
    L13-16 (SSW2) - Body ground
    		L - Body ground
    		Engine switch 2 input
    		Engine switch not pushed
    		10 kΩ or higher
    DA-40 (GND1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    DA-23 or DA-52 (LIN1) - Body ground
    		O - Body ground
    		LIN line
    		Always
    		10 kΩ or higher

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

  3. Reconnect the A68, L13 and DA main body ECU connectors.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L13-22 (ACCD) - DA-40 (GND1)
    		G - W-B
    		D-ACC relay drive signal
    		Engine switch on (ACC)
    		11 to 14 V
    L13-22 (ACCD) - DA-40 (GND1)
    		G - W-B
    		D-ACC relay drive signal
    		Engine switch off
    		Below 1 V
    L12-11 (IG2D) - DA-40 (GND1)
    		P - W-B
    		IG2 relay drive signal
    		Engine switch on (IG)
    		11 to 14 V
    L12-11 (IG2D) - DA-40 (GND1)
    		P - W-B
    		IG2 relay drive signal
    		Engine switch on (ACC)
    		Below 1 V
    L13-19 (SLR+) - DA-40 (GND1)
    		SB - W-B
    		Steering lock power supply
    		Steering lock motor operating
    		Below 1 V
    L13-19 (SLR+) - DA-40 (GND1)
    		SB - W-B
    		Steering lock power supply
    		Steering lock motor not operating
    		11 to 14 V
    L13-18 (SLP) - DA-40 (GND1)
    		LG - W-B
    		Steering lock actuator position signal
    		Steering lock locked
    		11 to 14 V
    L13-18 (SLP) - DA-40 (GND1)
    		LG - W-B
    		Steering lock actuator position signal
    		Steering lock released
    		Below 1 V
    L11-9 (SPD) - DA-40 (GND1)
    		V - W-B
    		Speed signal from combination meter
    		Engine switch on (IG), rotate driving wheel slowly
    		Pulse generation
    (see waveform 1)
    L11-8 (TACH) - DA-40 (GND1)
    		B - W-B
    		Tachometer signal
    		Engine running
    		Pulse generation
    (see waveform 2)
    A68-4 (STSW) - DA-40 (GND1)
    		B - W-B
    		Starter activation request signal
    		Brake pedal depressed with shift lever in P or N, engine switch pushed once
    		11 to 14 V*
    L13-8 (STR) - DA-40 (GND1)
    		L - W-B
    		Park / neutral position switch
    		Shift lever in P or N
    		Below 1 V
    A68-6 (STR2) - DA-40 (GND1)
    		BR - W-R
    		Starter signal
    		Brake pedal depressed with shift lever in P or N, engine switch pushed once
    		11 to 14 V*
    L13-15 (INDS) - DA-40 (GND1)
    		B - W-B
    		Vehicle condition signal
    		Brake pedal depressed with shift lever in P or N, engine switch off, on (ACC, IG)
    		9 to 14 V
    L13-14 (INDW) - DA-40 (GND1)
    		P - W-B
    		Vehicle condition signal
    		Brake pedal released with shift lever in P or N, engine switch off, on (ACC, IG)
    		9 to 14 V
    L13-25 (SWIL) - DA-40 (GND1)
    		R - W-B
    		Illumination signal
    		Light control switch TAIL or HEAD
    		11 to 14 V
    DH-15 (STP) - DA-40 (GND1)
    		L - W-B
    		Stop light switch signal
    		Brake pedal depressed
    		11 to 14 V

    УКАЗАНИЕ:
    *: Voltage is output for 0.3 seconds before the engine is started.

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



    5. I042329E10

  5. Using an oscilloscope, check waveform 1.
    Waveform 1 (Reference) 
    Item
    		Content
    Terminal No. (Symbols)
    		L11-9 (SPD) - DA-40 (GND1)
    Tool setting
    		5 V/DIV., 10 msec./DIV.
    Condition
    		Driving at approx. 20 km/h (12 mph)

    УКАЗАНИЕ:
    As the vehicle speed increases, the wavelength shortens.



    6. I042330E21

  6. Using an oscilloscope, check waveform 2.
    Waveform 2 (Reference) 
    Item
    		Content
    Terminal No. (Symbols)
    		L11-8 (TACH) - DA-40 (GND1)
    Tool setting
    		5 V/DIV., 10 msec./DIV.
    Condition
    		Engine idling

    УКАЗАНИЕ:
    As the vehicle speed increases, the wavelength shortens.


CHECK CERTIFICATION ECU

B108931E18

  1. Disconnect the L15 certification ECU connector.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L15-1 (+B1) - Body ground
    		L - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    L15-18 (IG) - Body ground
    		L - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    L15-18 (IG) - Body ground
    		L - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    L15-10 (LIN) - Body ground
    		O - Body ground
    		LIN line
    		Always
    		10 kΩ or higher
    L15-17 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω

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


CHECK ECM

A103802E27

  1. Disconnect the A13, A14, E2 and E3 ECM connectors.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    A14-7 (BATT) - E3-1 (E1)
    		B - W-B
    		Battery (for measuring battery voltage and for ECM memory)
    		Always
    		11 to 14 V
    A13-1 (+B) - E3-1 (E1)
    		BW - W-B
    		Power source of ECM
    		Engine switch on (IG)
    		11 to 14 V
    A14-8 (IGSW) - E3-1 (E1)
    		R - BR
    		Engine switch signal
    		Always
    		11 to 14 V
    E3-1 (E1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E2-1 (E02) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E3-4 (E04) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E2-2 (E01) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    A13-5 (E03) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω

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

  3. Reconnect the A13, A14, E2 and E3 ECM connectors.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    A13-20 (STA) - E3-1 (E1)
    		Y - W-B
    		Starter relay operation signal
    		Cranking
    		5.5 V or more
    A13-19 (ACCR) - E3-1 (E1)
    		G - W-B
    		D-ACC relay cut signal
    (output)
    		Engine switch on (IG) → Cranking
    		11 to 14 V → Below 1 V
    A14-15 (TACH) - E3-1 (E1)
    		R - W-B
    		Engine revolution signal
    (output)
    		Idling
    		Pulse generation
    (see waveform 1)
    A14-2 (STAR) - E3-1 (E1)
    		BR - W-B
    		Starter relay drive signal
    		Cranking
    		11 to 14 V

    1. If the result is not as specified, the ECM may have a malfunction.



    5. I042330E23

  5. Using an oscilloscope, check waveform 1.
    Waveform 1 (Reference) 
    Item
    		Content
    Terminal No. (Symbols)
    		A14-15 (TACH) - E3-1 (E1)
    Tool setting
    		5 V/DIV., 10 msec./DIV.
    Condition
    		Engine idling

    УКАЗАНИЕ:
    As the vehicle speed increases, the wavelength shortens.


CHECK STEERING LOCK ECU

B106649E20

  1. Disconnect the L33 steering lock ECU connector.

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

    Terminal No. (Symbols)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L33-7 (B) - Body ground
    		P - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    L33-6 (IG2) - Body ground
    		L - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    L33-6 (IG2) - Body ground
    		L - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    L33-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    L33-2 (SGND) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω

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