Entry And Start System (For Start Function) Terminals Of Ecu

  1. CHECK POWER MANAGEMENT CONTROL ECU

  1. CHECK CERTIFICATION ECU

  1. CHECK STEERING LOCK ECU

Entry And Start System (For Start Function) -- Terminals Of Ecu



CHECK POWER MANAGEMENT CONTROL ECU

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Terminals Of Ecu

  1. Disconnect the G51 power management control ECU connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G51-1 (AM22) - Body ground
    		B - Body ground
    		+B power supply
    		Always
    		9.5 to 14 V
    G51-2 (AM21) - Body ground
    		B - Body ground
    		+B power supply
    		Always
    		9.5 to 14 V
    G51-5 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    G51-6 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    G51-17 (SSW2) - Body ground
    		R - Body ground
    		Engine switch signal
    		Engine switch pushed
    		Below 1 Ω
    G51-17 (SSW2) - Body ground
    		R - Body ground
    		Engine switch signal
    		Engine switch not pushed
    		10 kΩ or higher
    G51-18 (SSW1) - Body ground
    		LG - Body ground
    		Engine switch signal
    		Engine switch pushed
    		Below 1 Ω
    G51-18 (SSW1) - Body ground
    		LG - Body ground
    		Engine switch signal
    		Engine switch not pushed
    		10 kΩ or higher
    G51-24 (LIN2) - Body ground
    		G - 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 G51 power management control ECU connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G51-3 (SLP) - G51-6 (GND)
    		SB - W-B
    		Steering lock actuator position signal
    		Steering lock released
    		Pulse generation
    (See waveform 1)
    G51-3 (SLP) - G51-6 (GND)
    		SB - W-B
    		Steering lock actuator position signal
    		Steering lock locked
    		Pulse generation
    (See waveform 1)
    G51-8 (SLR+) - G51-6 (GND)
    		W - W-B
    		Steering lock motor signal
    		Steering lock motor operating
    		Below 1 V
    G51-8 (SLR+) - G51-6 (GND)
    		W - W-B
    		Steering lock motor signal
    		Steering lock motor not operating
    		11 to 14 V
    G51-10 (INDW) - G51-6 (GND)
    		L - W-B
    		Warning signal
    for Manual Transmission:
    1. Clutch pedal depressed
    2. Engine switch on (ACC) or on (IG)
    for Automatic Transmission:
    1. Brake pedal depressed
    2. Shift lever in P
    3. Engine switch on (ACC) or on (IG)
    		8 to 14 V
    G51-16 (P) - G51-6 (GND)
    		V - W-B
    		Shift lock signal
    		Shift lever in P*1
    		8 to 14 V
    G51-16 (P) - G51-6 (GND)
    		V - W-B
    		Shift lock signal
    		Shift lever not in P*1
    		Below 1 V
    G51-19 (ACCD) - G51-6 (GND)
    		R - W-B
    		ACC signal
    		Engine switch on (ACC)
    		8 to 14 V
    G51-19 (ACCD) - G51-6 (GND)
    		R - W-B
    		ACC signal
    		Engine switch off
    		Below 1 V
    G51-20 (IG1D) - G51-6 (GND)
    		V - W-B
    		IG1 signal
    		Engine switch on (IG)
    		8 to 14 V
    G51-20 (IG1D) - G51-6 (GND)
    		V - W-B
    		IG1 signal
    		Engine switch on (ACC)
    		Below 1 V
    G51-22 (INDS) - G51-6 (GND)
    		B - W-B
    		Vehicle condition signal
    for Manual Transmission:
    1. Clutch pedal depressed
    for Automatic Transmission:
    1. Brake pedal depressed
    2. Shift lever in P
    		8 to 14 V
    G51-23 (SPD) - G51-6 (GND)
    		R - W-B
    		Vehicle speed signal
    		Engine switch on (IG), vehicle being driven at approx. 20 km/h (12 mph)
    		Pulse generation
    (See waveform 2)
    G50-2 (STA) - G51-6 (GND)
    		W - W-B
    		Park/neutral position switch*1 or clutch start switch*2 signal
    for Manual Transmission:
    1. Clutch pedal depressed
    for Automatic Transmission:
    1. Shift lever in P or N
    		Below 1 V
    G50-3 (STAR) - G51-6 (GND)
    		B - W-B
    		Starter signal
    for Manual Transmission:
    1. Clutch pedal depressed
    2. Engine cranking
    for Automatic Transmission:
    1. Brake pedal depressed
    2. Shift lever in P
    3. Engine cranking
    		8 to 14 V*3
    G50-8 (IG2D) - G51-6 (GND)
    		L - W-B
    		IG2 signal
    		Engine switch on (IG)
    		8 to 14 V
    G50-8 (IG2D) - G51-6 (GND)
    		L - W-B
    		IG2 signal
    		Engine switch on (ACC)
    		Below 1 V
    G50-11 (STP1) - G51-6 (GND)
    		V - W-B
    		Stop light signal
    		Brake pedal depressed*1
    		8 to 14 V
    G50-11 (STP1) - G51-6 (GND)
    		V - W-B
    		Stop light signal
    		Brake pedal released*1
    		Below 1 V
    1. *1: for Automatic Transmission
    2. *2: for Manual Transmission
    3. *3: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the connector from the ECM 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.



      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Terminals Of Ecu

    1. Waveform 1

      Waveform 1 (Reference)
      Terminal No. (Symbol)
      		G51-3 (SLP) - G51-6 (GND)
      Tool Setting
      		2 V/DIV., 100 ms./DIV.
      Vehicle Condition
      		Steering lock locked or released


      2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Terminals Of Ecu

    2. Waveform 2

      Waveform 2 (Reference)
      Terminal No. (Symbol)
      		G51-23 (SPD) - G51-6 (GND)
      Tool Setting
      		5 V/DIV., 10 ms./DIV.
      Vehicle Condition
      		Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)
      HINT:
      As the vehicle speed increases, the wavelength shortens.

CHECK CERTIFICATION ECU

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Terminals Of Ecu

  1. Disconnect the G38 certification ECU connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G38-1 (+B) - Body ground
    		V - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    G38-15 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    G38-29 (LIN) - Body ground
    		G - 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.

CHECK STEERING LOCK ECU
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Terminals Of Ecu

  1. Disconnect the G35 steering lock ECU connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G35-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    G35-6 (IG2) - Body ground
    		W - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    G35-6 (IG2) - Body ground
    		W - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    G35-7 (B) - Body ground
    		G - Body ground
    		+B power supply
    		Always
    		11 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the G35 steering lock ECU connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G35-4 (SLP1) - G35-1 (GND)
    		SB - W-B
    		Steering lock actuator position signal
    		Steering lock locked
    		11 to 14 V
    G35-4 (SLP1) - G35-1 (GND)
    		SB - W-B
    		Steering lock actuator position signal
    		Steering lock released
    		Below 1 V
    1. If the result is not as specified, the ECU may have a malfunction.