TRANSFER SYSTEM TERMINALS OF ECU

CHECK 4 WHEEL DRIVE CONTROL 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
   A27-1 (P1) - A28-10 (GND)	LG - W-B	Center differential lock detection switch input	Ignition switch ON Center differential free	10 to 14 V
   			Ignition switch ON Center differential lock	Below 1.5 V
   A27-2 (RLY2) - A28-10 (GND)*3	W - W-B	Limit switch of differential lock shift actuator input	Ignition switch ON Rear differential not free	Below 0.5 V
   			Ignition switch ON Rear differential free	10 to 14 V
   A27-3 (NP) - A28-10 (GND)*1	G - W-B	Neutral position detection switch input	Ignition switch ON Neutral position detection switch ON (When transfer is in neutral)	10 to 14 V
   			Ignition switch ON Neutral position detection switch OFF (When transfer is not in neutral)	Below 1.5 V
   A27-5 (TT) - A27-25 (TGND)*4	G - P	Temperature sensor	Ignition switch ON	0 to 5 V
   A27-6 (HL3) - A28-10 (GND)	R - W-B	High-low transfer limit switch input	Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer high	10 to 14 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Switching between transfer high and low When transfer is in neutral*1	Below 1.5 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer low	10 to 14 V
   A27-7 (HL2) - A28-10 (GND)	P - W-B	High-low transfer limit switch input	Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer high When transfer is in neutral*1	10 to 14 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Switching between transfer high and low	10 to 14 V ←→ Below 1.5 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer low	Below 1.5 V
   A27-8 (HL1) - A28-10 (GND)	BE - W-B	High-low transfer limit switch input	Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer high	Below 1.5 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Switching between transfer high and low	Below 1.5 V ←→ 10 to 14 V
   			Ignition switch ON Shift lever in neutral*1 Shift lever in N*2 Transfer low When transfer is in neutral*1	10 to 14 V
   A27-9 (TL3) - A28-10 (GND)	W - W-B	Center differential lock limit switch input	Ignition switch ON Center differential free	Below 1.5 V
   			Ignition switch ON Switching center differential between free and lock	Below 1.5 V
   			Ignition switch ON Center differential lock	10 to 14 V
   A27-10 (TL2) - A28-10 (GND)	B - W-B	Center differential lock limit switch input	Ignition switch ON Center differential free	10 to 14 V
   			Ignition switch ON Switching center differential between free and lock	Below 1.5 V
   			Ignition switch ON Center differential lock	Below 1.5 V
   A27-11 (RLY1) - A28-10 (GND)*3	G - W-B	Limit switch of differential lock shift actuator input	Ignition switch ON Rear differential not lock	Below 0.5 V
   			Ignition switch ON Rear differential lock	10 to 14 V
   A27-12 (RLP) - A28-10 (GND)*3	B - W-B	Rear differential lock position switch input	Ignition switch ON Rear differential lock position switch ON (When rear differential lock)	Below 1.5 V
   			Ignition switch ON Rear differential lock position switch OFF (When rear differential free)	10 to 14 V
   A27-13 (LO) - A28-10 (GND)	P - W-B	Transfer position switch input	Ignition switch ON Transfer position switch H4	10 to 14 V
   			Ignition switch ON Transfer position switch L4	Below 1.5 V
   A27-14 (DL) - A28-10 (GND)	L - W-B	Center differential lock switch input	Ignition switch ON Center differential lock switch not pressed	10 to 14 V
   			Ignition switch ON Center differential lock switch pressed and held	Below 1.5 V
   A27-15 (R) - A28-10 (GND)*3	V - W-B	Differential lock switch input	Ignition switch ON Differential lock switch off (free)	10 to 14 V
   			Ignition switch ON Differential lock switch RR (lock)	Below 1.5 V
   A27-16 (L4) - A28-10 (GND)	R - W-B	L4 output signal	Ignition switch ON Transfer high	10 to 14 V
   			Ignition switch ON Transfer low	Below 1.5 V
   A27-18 (MTN) - A28-10 (GND)*1	L - W-B	Clutch start switch input	Ignition switch ON Clutch pedal released	10 to 14 V
   			Ignition switch ON Clutch pedal depressed	Below 2 V
   A27-20 (CANH) - A27-40 (CANL)	P - W	CAN communication line	Ignition switch off Cable disconnected from negative (-) battery terminal	54 to 69 Ω
   A27-21 (+B) - A28-10 (GND)	R - W-B	ECU power supply	Always	11 to 14 V
   A28-2 (HM1) - A28-10 (GND)	B - W-B	High-low transfer limit switch output	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from H4 to L4 (Switching from transfer high to low)	Below 1.5 V or pulse between 11 to 14 V and below 1.5 V ( waveform 1)
   			Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from L4 to H4 (Switching from transfer low to high)	10 to 14 V
   A28-3 (M1) - A28-10 (GND)*3	L - W-B	Differential lock shift motor output	Ignition switch ON Transfer low and center differential lock Differential lock switch switched from OFF (free) to RR (lock) (Switching rear differential from free to lock)	10 to 14 V
   			Ignition switch ON Transfer low and center differential lock Differential lock switch switched from RR (lock) to OFF (free) or transfer position switch switched from L4 to H4 (Switching rear differential from lock to free)	Below 1.5 V
   A28-4 (IG) - A28-10 (GND)	V - W-B	ECU and actuator power supply	Ignition switch ON	11 to 14 V
   A28-6 (HM2) - A28-10 (GND)	BR - W-B	High-low transfer limit switch output	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from H4 to L4 (Switching from transfer high to low)	10 to 14 V
   			Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from L4 to H4 (Switching from transfer low to high)	Below 1.5 V or pulse between 11 to 14 V and below 1.5 V ( waveform 1)
   A28-7 (TM2) - A28-10 (GND)	W - W-B	Center differential lock shift motor output	Ignition switch ON Center differential lock switch pressed to switch from free to lock (Switching center differential from free to lock)	Below 1.5 V or pulse between 11 to 14 V and below 1.5 V ( waveform 2)
   			Ignition switch ON Center differential lock switch pressed to switch from lock to free (Switching center differential from lock to free)	10 to 14 V
   A28-8 (TM1) - A28-10 (GND)	R - W-B	Center differential lock shift motor output	Ignition switch ON Center differential lock switch pressed to switch from free to lock (Switching center differential from free to lock)	10 to 14 V
   			Ignition switch ON Center differential lock switch pressed to switch from lock to free (Switching center differential from lock to free)	Below 1.5 V or pulse between 11 to 14 V and below 1.5 V ( waveform 2)
   A28-9 (M2) - A28-10 (GND)*3	B - W-B	Differential lock shift actuator motor	Ignition switch ON High-low transfer low and center differential lock Differential lock switch switched from OFF (free) to RR (lock) (Switching rear differential from free to lock)	Below 1.5 V
   			Ignition switch ON High-low transfer low and center differential lock Differential lock switch switched from RR (lock) to OFF (free) or transfer position switch switched from L4 to H4 (Switching rear differential from lock to free)	10 to 14 V
   A28-10 (GND) - Body ground	W-B - Body ground	GND	Always	Below 1 Ω

   
   

   • *1: for Manual Transmission

   • *2: for Automatic Transmission

   • *3: w/ Rear Differential Lock

   • *4: w/ Temperature Sensor

2. 

   *a	5 V/DIV.
   *b	200 ms./DIV

   Waveform 1

   
   

   1. When a gear is engaged and switching is performed

      Item	Content
      Tester Connection	A28-2 (HM1) - A28-10 (GND)
      Tool Setting	5 V/DIV., 200 ms./DIV.
      Condition	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from H4 to L4 (Switching from transfer high to low)

      Item	Content
      Tester Connection	A28-6 (HM2) - A28-10 (GND)
      Tool Setting	5 V/DIV., 200 ms./DIV.
      Condition	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from L4 to H4 (Switching from transfer low to high)

      
      

      • *1: for Manual Transmission

      • *2: for Automatic Transmission

   2. 

      *a	5 V/DIV.
      *b	1 s./DIV.

      When a gear is not engaged and switching is not performed

      Item	Content
      Tester Connection	A28-2 (HM1) - A28-10 (GND)
      Tool Setting	5 V/DIV., 1s./DIV.
      Condition	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from H4 to L4 (Switching from transfer high to low)

      Item	Content
      Tester Connection	A28-6 (HM2) - A28-10 (GND)
      Tool Setting	5 V/DIV., 1 s./DIV.
      Condition	Ignition switch ON Clutch pedal depressed*1 Shift lever in N*2 Transfer position switch switched from L4 to H4 (Switching from transfer low to high)

      
      

      • *1: for Manual Transmission

      • *2: for Automatic Transmission

3. Waveform 2

   
   
   1. 

      *a	5 V/DIV.
      *b	100 ms./DIV.

      When a gear is engaged and switching is performed

      Item	Content
      Tester Connection	A28-7 (TM2) - A28-10 (GND)
      Tool Setting	5 V/DIV., 100 ms./DIV.
      Condition	Ignition switch ON Center differential lock switch pressed to switch from free to lock (Switching center differential from free to lock)

      Item	Content
      Tester Connection	A28-8 (TM1) - A28-10 (GND)
      Tool Setting	5 V/DIV., 100 ms./DIV.
      Condition	Ignition switch ON Center differential lock switch pressed to switch from lock to free (Switching center differential from lock to free)

   2. 

      *a	5 V/DIV.
      *b	2 s./DIV.

      When a gear is not engaged and switching is not performed

      Item	Content
      Tester Connection	A28-7 (TM2) - A28-10 (GND)
      Tool Setting	5 V/DIV., 2 s./DIV.
      Condition	Ignition switch ON Center differential lock switch pressed to switch from free to lock (Switching center differential from free to lock)

      Item	Content
      Tester Connection	A28-8 (TM1) - A28-10 (GND)
      Tool Setting	5 V/DIV., 2 s./DIV.
      Condition	Ignition switch ON Center differential lock switch pressed to switch from lock to free (Switching center differential from lock to free)