Differential System Terminals Of Ecu

  1. CHECK 4WD CONTROL ECU

Differential System -- Terminals Of Ecu



CHECK 4WD CONTROL ECU

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Axle And Differential.Axle System.Differential System Terminals Of Ecu

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G53-9 (RLY1) - G54-4 (GND)
    		G - W-B
    		Rear differential lock actuator limit switch
    		Ignition switch ON
    Rear differential lock actuator limit switch on
    		Below 1.5 V
    Ignition switch ON
    Rear differential lock actuator limit switch off
    		11 to 14 V
    G53-10 (RLY2) - G54-4 (GND)
    		P - W-B
    		Rear differential lock actuator limit switch
    		Ignition switch ON
    Rear differential lock actuator limit switch on
    		Below 1.5 V
    Ignition switch ON
    Rear differential lock actuator limit switch off
    		11 to 14 V
    G53-3 (R) - G54-4 (GND)
    		R - W-B
    		w/ Combination Switch:
    Center cluster module switch
    (Rear differential lock control switch)
    		Ignition switch ON
    Rear differential lock switch on
    		Below 1.5 V
    Ignition switch ON
    Rear differential lock switch off
    		11 to 14 V
    w/o Combination Switch:
    Differential lock switch
    		Ignition switch ON
    Rear differential lock switch on
    		Below 1.5 V
    Ignition switch ON
    Rear differential lock switch off
    		11 to 14 V
    G53-15 (RLP) - G54-4 (GND)
    		V - W-B
    		Rear differential lock detection switch
    		Ignition switch ON
    Rear differential lock detection switch on
    		Below 1.5 V
    Ignition switch ON
    Rear differential lock detection switch off
    		9.5 to 14 V
    G54-1 (M1) - G54-4 (GND)
    		B - W-B
    		Differential lock actuator motor
    		Ignition switch ON
    Differential lock switch off → on (Differential lock switch OFF → ON (For 5 seconds after power supplied or until switching of limit switch is complete during FREE to LOCK switching))
    		11 to 14 V
    Ignition switch ON
    Differential lock switch off → on (Differential lock actuator motor stopped)
    		Below 1.5 V
    G54-3 (IG) - G54-4 (GND)
    		R - W-B
    		IG power
    		Ignition switch ON
    		11 to 14 V
    G54-4 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    G54-5 (M2) - G54-4 (GND)
    		Y - W-B
    		Differential lock actuator motor
    		Ignition switch ON
    Differential lock switch on → off (Differential lock switch ON → OFF (For 5 seconds after power supplied or until switching of limit switch is complete during LOCK to FREE switching))
    		11 to 14 V
    Ignition switch ON
    Differential lock switch on → off (Differential lock actuator motor stopped)
    		Below 1.5 V
    G53-19 (CANH) - G54-4 (GND)
    		G - W-B
    		CAN communication line
    		Ignition switch ON
    		Pulse generation (see waveform 1)
    G53-20 (CANL) - G54-4 (GND)
    		W - W-B
    		CAN communication line
    		Ignition switch ON
    		Pulse generation (see waveform 2)


    2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Axle And Differential.Axle System.Differential System Terminals Of Ecu

  2. Using an oscilloscope, check waveform 1.

    Waveform 1 (Reference)
    Item
    		Content
    Terminal No. (Symbol)
    		F47-19 (CANH) - F46-4 (GND)
    Tool setting
    		1 V/DIV., 10 μsec./DIV.
    Condition
    		Engine stopped and ignition switch ON
    Text in Illustration
    *1
    		Waveform 1
    HINT:
    The waveform varies depending on the CAN communication signal.


    3. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Axle And Differential.Axle System.Differential System Terminals Of Ecu

  3. Using an oscilloscope, check waveform 2.

    Waveform 2 (Reference)
    Item
    		Content
    Terminal No. (Symbol)
    		F47-20 (CANL) - F46-4 (GND)
    Tool setting
    		1 V/DIV., 10 μsec./DIV.
    Condition
    		Engine stopped and ignition switch ON
    Text in Illustration
    *1
    		Waveform 2
    HINT:
    The waveform varies depending on the CAN communication signal.