Smart Key System (For Start Function) Terminals Of Ecu

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  1. CHECK ECM

  1. CHECK STEERING LOCK ECU

Smart Key System (For Start Function) -- Terminals Of Ecu



CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

  1. Disconnect the E50, E51, E52, 2E and 2C ECU connectors.

  2. Measure the voltage and resistance of the wire harness side connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E51-1 (AM1) - Body ground
    		L - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    E50-6 (AM2) - Body ground
    		L - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    E51-9 (SSW2) - Body ground
    		R - Body ground
    		Engine switch signal
    		Engine switch pushed
    		Below 1 Ω
    E51-9 (SSW2) - Body ground
    		R - Body ground
    		Engine switch signal
    		Engine switch not pushed
    		10 kΩ or higher
    E51-10 (SSW1) - Body ground
    		W - Body ground
    		Engine switch signal
    		Engine switch pushed
    		Below 1 Ω
    E51-10 (SSW1) - Body ground
    		W - Body ground
    		Engine switch signal
    		Engine switch not pushed
    		10 kΩ or higher
    E51-4 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E52-15 (CANH) - Body ground
    		R - Body ground
    		CAN Line
    		Always
    		10 kΩ or higher
    E52-16 (CANL) - Body ground
    		W - Body ground
    		CAN Line
    		Always
    		10 kΩ or higher
    E51-12 (CANN) - Body ground
    		W - Body ground
    		CAN Line
    		Always
    		10 kΩ or higher
    E51-11 (CANP) - Body ground
    		R - Body ground
    		CAN Line
    		Always
    		10 kΩ or higher
    2E-17 (GND1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    2C-12 (LIN1) - Body ground
    		V - Body ground
    		LIN line
    		Always
    		10 kΩ or higher
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the ECU connectors.

  4. Measure the voltage of the connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E52-11 (ACCR) - E51-4 (GND2)
    		P - W-B
    		Starter assist signal
    (ACC cut signal)
    		Brake pedal depressed, shift lever P, engine switch is pushed once → on (IG)
    		0.1 to 0.8 V*1
    → Output voltage at terminal AM1 or AM2 is -2 V or more.
    E51-5 (IG2D) - E51-4 (GND2)
    		BR - W-B
    		IG2 signal
    		Engine switch on (IG)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E51-5 (IG2D) - E51-4 (GND2)
    		BR - W-B
    		IG2 signal
    		Engine switch on (ACC)
    		Below 1 V
    E51-6 (IG1D) - E51-4 (GND2)
    		G - W-B
    		IG1 signal
    		Engine switch on (IG)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E51-6 (IG1D) - E51-4 (GND2)
    		G - W-B
    		IG1 signal
    		Engine switch on (ACC)
    		Below 1 V
    E52-3 (STR) - E51-4 (GND2)
    		W - W-B
    		Park/Neutral position switch signal
    		Engine switch on (IG), shift lever except P or N → P or N
    		Below 2 V → Pulse generation*3
    E50-18 (SLP) - E51-4 (GND2)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering lock is locked
    		Pulse generation
    (See waveform 3)
    E50-18 (SLP) - E51-4 (GND2)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering lock is released
    		Pulse generation
    (See waveform 3)
    E50-7 (SLR+) - E51-4 (GND2)
    		LG - W-B
    		Steering lock motor signal
    		Steering lock motor operating
    		Below 1 V
    E50-7 (SLR+) - E51-4 (GND2)
    		LG - W-B
    		Steering lock motor signal
    		Steering lock motor does not operate
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E50-4 (ACCD) - E51-4 (GND2)
    		GR - W-B
    		ACC signal
    		Engine switch on (ACC)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E50-4 (ACCD) - E51-4 (GND2)
    		GR - W-B
    		ACC signal
    		Engine switch off
    		Below 1 V
    E51-8 (SWIL) - E51-4 (GND2)
    		L - W-B
    		Illumination signal
    		Light control switch TAIL or HEAD
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E52-2 (TACH) - E51-4 (GND2)
    		GR - W-B
    		Tachometer signal
    		Engine running
    		Pulse generation
    (See waveform 2)
    2E-1 (SPD) - E51-4 (GND2)
    		V - W-B
    		Vehicle speed signal
    		Engine switch on (IG), rotate rear wheel slowly
    		Pulse generation
    (See waveform 1)
    E52-4 (STSW) - E51-4 (GND2)
    		B - W-B
    		Starter activation request signal
    		Brake pedal depressed, engine switch held on (ST)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E52-14 (STR2) - E51-4 (GND2)
    		Y - W-B
    		Starter signal (Sub)
    		Brake pedal depressed, shift lever P or N, engine switch on (ST)
    		Output voltage at terminal AM1 or AM2 is -3.5 V or more.*2
    2F-5 (ACC) - Body ground
    		L - Body ground
    		ACC power supply
    		Always
    		11 to 14 V
    2G-1 (IG) - Body ground
    		W - Body ground
    		IG power supply
    		Always
    		11 to 14 V
    E50-14 (STP) - E51-4 (GND2)
    		L - W-B
    		Stop light signal
    		Brake pedal depressed
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    E50-14 (STP) - E51-4 (GND2)
    		L - W-B
    		Stop light signal
    		Brake pedal released
    		Below 1 V
    HINT:
    *1: Voltage is output only when the engine is cranking.
    *2: Voltage is output for 0.3 seconds when the engine is cranking to start. Disconnect the B31 connector from the ECM and ST CUT relay before measuring the voltage.
    *3: Remove the ST CUT relay before measuring the voltage.
    If the result is not as specified, the ECU may have a malfunction.


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



      Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

    1. Waveform 1

      Waveform 1 (Reference)
      Terminal No.
      		2E-1 (SPD) - E51-4 (GND2)
      Tool Setting
      		5 V/DIV., 10 ms./DIV.
      Vehicle Condition
      		Driving at approx. 20 km/h (12 mph)
      HINT:
      As the vehicle speed increases, the wavelength shortens.


      2. Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

    2. Waveform 2

      Waveform 2 (Reference)
      Terminal No.
      		E52-2 (TACH) - E51-4 (GND2)
      Tool Setting
      		5 V/DIV., 10 ms./DIV.
      Vehicle Condition
      		Engine idling
      HINT:
      As the engine revolution speed increases, the wavelength shortens.


      3. Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

    3. Waveform 3

      Waveform 3 (Reference)
      Terminal No.
      		E50-18 (SLP) - E51-4 (GND2)
      Tool Setting
      		2 V/DIV., 100 ms./DIV.
      Vehicle Condition
      		Steering lock/unlock

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

  1. Disconnect the E36 ECU connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E36-1 (+B) - Body ground
    		GR - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    E36-10 (LIN) - Body ground
    		V - Body ground
    		LIN line
    		Always
    		10 kΩ or higher
    E36-17 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the ECU connector.

  4. Measure the voltage of the connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E36-18 (IG) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    E36-18 (IG) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    If the result is not as specified, the ECU may have a malfunction.

CHECK ECM

Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

  1. Disconnect the B31 and A50 ECM connectors.

  2. Measure the voltage and resistance of the wire harness side connectors.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    A50-1 (+B2) - Body ground
    		B - Body ground
    		Power source of ECM
    		Engine switch on (IG)
    		11 to 14 V
    A50-2 (+B) - Body ground
    		B - Body ground
    		Power source of ECM
    		Engine switch on (IG)
    		11 to 14 V
    A50-27 (IGSW) - Body ground
    		B - Body ground
    		Engine switch signal
    		Engine switch on (IG)
    		11 to 14 V
    B31-44 (ME01) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B31-45 (E02) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B31-46 (E01) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B31-41 (E04) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    A50-32 (EC) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B31-105 (E1) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B31-81 (E03) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω

  3. Reconnect the ECM connectors.

  4. Measure the voltage of the connectors.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    A50-13 (ACCR) - B31-105 (E1)
    		L-Y - BR
    		ACC relay cut signal (output)
    		Brake pedal depressed, shift lever P or N, engine switch is pushed once → on (IG)
    		0.1 to 0.8 V* → Output voltage at terminal AM1 or AM2 is -2 V or more.
    A50-14 (STSW) - B31-105 (E1)
    		W-G - BR
    		Starter activation request signal
    		Brake pedal depressed, engine switch held (IG)
    		Output voltage at terminal AM1 or AM2 is -2 V or more.
    A50-15 (TACH) - B31-105 (E1)
    		GR - BR
    		Engine revolution signal (output)
    		Idling
    		Pulse generation (see waveform 1)
    A50-36 (STP) - B31-105 (E1)
    		L - BR
    		Stop light switch signal (input)
    		Brake pedal depressed
    		7.5 to 14 V
    A50-36 (STP) - B31-105 (E1)
    		L - BR
    		Stop light switch signal (input)
    		Brake pedal released
    		Below 1.5 V
    A50-48 (STA) - B31-105 (E1)
    		LG - BR
    		ST relay operation signal
    		Cranking
    		11 to 14 V
    A50-25 (STAR) - B31-105 (E1)
    		W - BR
    		Starter signal (Main)
    		Brake pedal depressed, shift lever P or N, engine switch on (ST)
    		11 to 14 V
    HINT:
    *: Voltage is output only when the engine is cranking.
    If the result is not as specified, the ECM may have a malfunction.


    5. Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

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

    Waveform 1 (Reference)
    Terminal No.
    		A50-15 (TACH) - B31-105 (E1)
    Tool Setting
    		5 V/DIV., 10 ms./DIV.
    Vehicle Condition
    		Engine idling

CHECK STEERING LOCK ECU

Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function).Smart Key System (For Start Function) Terminals Of Ecu

  1. Disconnect the E39 ECU connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E39-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E39-2 (SGND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E39-6 (IG2) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    E39-6 (IG2) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    E39-7 (B) - Body ground
    		L - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the E39 ECU connector.

  4. Measure the voltage of the connector.

    Tester Connection
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E39-4 (SLP1) - E39-1 (GND)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering is locked
    		11 to 14 V
    E39-4 (SLP1) - E39-1 (GND)
    		BR - W-B
    		Steering lock actuator position signal
    		Steering is released
    		Below 1 V
    1. If the result is not as specified, the ECU may have a malfunction.