DIFFERENTIAL SYSTEM(w/ Differential Lock) TERMINALS OF ECU

CHECK 4 WHEEL DRIVE CONTROL ECU

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   C60-12 (SLS) - C61-10 (GND)	R - W-B	Rear differential lock position switch (No. 1 transfer indicator switch) input	Ignition switch ON Rear differential FREE	10 to 14 V
   			Ignition switch ON Rear differential LOCK	Below 1.5 V
   C60-15 (R) - C61-10 (GND)	G - W-B	Differential lock switch input	Ignition switch ON Differential lock switch not pressed	11 to 14 V
   			Ignition switch ON Differential lock switch pressed and held	Below 1.5 V
   C60-20 (CANH) - C60-40 (CANL)	R - W	HIGH-level CAN bus wire - LOW-level CAN bus wire	Ignition switch off Cable disconnected from negative (-) battery terminal	54 to 69 Ω
   C60-21 (+B) - C61-10 (GND)	L - W-B	ECU power supply	Always	10 to 14 V
   C61-1 (SL+) - C61-10 (GND)	W - W-B	Differential lock coil drive output (continuity with IG when operating)	Ignition switch ON Rear differential free	Below 1.5 V
   			Ignition switch ON Switching between free and locked (Condition: A or C)	Pulse generation (See waveform 1)
   			Ignition switch ON Rear differential locked (Condition B)	Pulse generation (See waveform 1)
   C61-4 (IG) - C61-10 (GND)	G - W-B	ECU and actuator power supply	Ignition switch ON	11 to 14 V
   C61-5 (SL-) - C61-10 (GND)	R - W-B	Differential lock coil drive output (continuity with GND when operating)	Ignition switch ON Rear differential free	Below 1.5 V
   			Ignition switch ON Rear differential switching between free and locked (Condition: A or C)	Pulse generation (See waveform 2)
   			Ignition switch ON Rear differential locked (Condition B)	Pulse generation (See waveform 2)
   C61-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

2. Waveform 1

   
   
   1. 

      *a	Condition: A
      *b	Condition: B

      Rear differential in locked condition

      Item	Content
      Tester Connection	C61-1 (SL+) - C61-10 (GND)
      Tool Setting	5 V/DIV., 500 ms./DIV.
      Condition: A	Ignition switch ON Switching between free and locked
      Condition: B	Ignition switch ON Rear differential locked

   2. 

      *a	5 V/DIV.
      *b	500 ms./DIV.

      Rear differential not in locked condition (switching between free and locked)

      Item	Content
      Tester Connection	C61-1 (SL+) - C61-10 (GND)
      Tool Setting	5 V/DIV., 500 ms./DIV.
      Condition: C	Ignition switch ON Switching between free and locked

3. Waveform 2

   
   
   1. 

      *a	Condition: A
      *b	Condition: B

      Rear differential in locked condition

      Item	Content
      Tester Connection	C61-5 (SL-) - C61-10 (GND)
      Tool Setting	5 V/DIV., 500 ms./DIV.
      Condition: A	Ignition switch ON Switching between free and locked
      Condition: B	Ignition switch ON Rear differential locked

   2. 

      *a	5 V/DIV.
      *b	500 ms./DIV.

      Rear differential not in locked condition (switching between free and locked)

      Item	Content
      Tester Connection	C61-5 (SL-) - C61-10 (GND)
      Tool Setting	5 V/DIV., 500 ms./DIV.
      Condition: C	Ignition switch ON Switching between free and locked