DIFFERENTIAL SYSTEM TERMINALS OF ECU


  1. CHECK 4WD CONTROL ECU

    A01DS59E12

    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 Rear 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. A01DSS4E52
      Text in Illustration
      *1 Waveform 1

      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

      Tech Tips

      The waveform varies depending on the CAN communication signal.

    3. A01DQ02E49
      Text in Illustration
      *1 Waveform 2

      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

      Tech Tips

      The waveform varies depending on the CAN communication signal.