Transfer System Inspection

Check the 4LO indicator light.

1. Start the engine.
   

2. Stop the vehicle.
   

3. for Automatic Transmission: Move the shift lever to N.
   for Manual Transmission: Depress the clutch pedal.
   

4. Turn the transfer position switch from H4 to L4.
   

5. Check the 4LO indicator light.
   

   
   
   1. w/ VSC:
      

      OK:

      Switch Condition	Specified Condition
      Turned from H4 to L4	4LO indicator light comes on immediately or comes on after blinking

      If there is a malfunction, inspect the switch, ECU and transfer shift actuator. If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In that case, first check the CAN communication system for LHD (Click here), for RHD (Click here). Then check the combination meter (Click here).
      
   
   
   2. w/o VSC:
      

      OK:

      Switch Condition	Specified Condition
      Turned from H4 to L4	4LO indicator light and center differential lock indicator light come on immediately or come on after blinking

      If there is a malfunction, inspect the switch, ECU and transfer shift actuator. If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In that case, first check the CAN communication system for LHD (Click here), for RHD (Click here). Then check the combination meter (Click here).
      

      HINT:

      For vehicles without VSC (Vehicle Stability Control), when the transfer position switch is turned from H4 to L4, the center differential will lock.

Check the center differential lock indicator light.

1. Start the engine.
   





2. Push the center differential lock switch.
   

   NOTICE:

   1. Do not push the switch while the vehicle is turning.
      
   2. Push the switch at a vehicle speed less than 100 km/h (60 mph).
      

3. Check the center differential lock indicator light.
   

   OK:

   Switch Condition	Specified Condition
   Pushed	Center differential lock indicator light comes on immediately or comes on after blinking

   If there is a malfunction, inspect the switch, ECU and transfer shift actuator. If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In that case, first check the CAN communication system for LHD (Click here), for RHD (Click here). Then check the combination meter (Click here).
   

w/ Rear Differential Lock:
Check the rear differential lock indicator light.

1. Start the engine.
   

2. Stop the vehicle.
   

3. for Automatic Transmission: Move the shift lever to N.
   for Manual Transmission: Depress the clutch pedal.
   

4. Turn the transfer position switch from H4 to L4.
   

   HINT:

   The rear differential can be locked only when the following conditions are met: 1) The transfer is in low, and 2) the center differential is locked. As vehicles with a rear differential lock do not have a vehicle stability control system, these conditions will be satisfied after the transfer position switch is turned to L4, the transfer shifts to low, and the center differential locks.

5. Turn the differential lock switch from OFF to RR.
   

   NOTICE:

   When locking the rear differential, make sure that the vehicle speed is less than 8 km/h (5 mph).





6. Check the rear differential lock indicator light.
   

   OK:

   Switch Condition	Specified Condition
   After transfer position switch is turned from H4 to L4, differential lock switch is turned from OFF to RR	Rear differential lock indicator light comes on immediately or comes on after blinking

   If there is a malfunction, inspect the switch, ECU and differential lock shift actuator.
   

   HINT:

   1. The 4LO indicator light and center differential lock indicator light are both illuminated.
      
   2. When the rear differential is locked, if the transfer position switch is returned to H4, the rear differential becomes free. However, since the differential lock switch is on RR, the rear differential lock indicator light blinks, and when the differential lock switch is turned to OFF, the indicator light turns off.
      

Remove the 4WD fuse from the main body ECU (cowl side junction block LH).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4WD fuse	Always	Below 1 Ω

Remove the transfer position switch (Click here).

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
2 (2WD) - 4 (GND2)	H4 position	100 kΩ or higher
	L4 position	Below 1 Ω

Check the harness and connector (ECU - transfer position switch and body ground).

1. Disconnect the A27 ECU connector.
   

2. Disconnect the E48 transfer position switch connector.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E48-2 (2WD) - A27-13 (LO)	Always	Below 1 Ω
   E48-2 (2WD) - Body ground	Always	100 kΩ or higher
   E48-4 (GND2) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Remove the center differential lock switch (Click here).

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
1 (L) - 4 (CPU)	Switch is pressed and held	Below 1 Ω
	Switch is not pressed	100 kΩ or higher

Check the harness and connector (ECU - center differential lock switch and body ground).

1. Disconnect the ECU connector.
   

2. Disconnect the center differential lock switch connector.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-12 (DL) - G12-4 (CPU)	Always	Below 1 Ω
   A27-12 (DL) - Body ground	Always	100 kΩ or higher
   G12-1 (L) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Remove the differential lock switch (Click here).

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
1 (IG) - 4 (R)	OFF	10 kΩ or higher
	RR	Below 1 Ω

Check the harness and connector (ECU - differential lock switch and body ground).

1. Disconnect the A27 ECU connector.
   

2. Disconnect the E87 differential lock switch connector.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-11 (R) - E87-1 (IG)	Always	Below 1 Ω
   A27-11 (R) - Body ground	Always	100 kΩ or higher
   E87-4 (R) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Check the harness and connector (ECU - high-low transfer shift actuator).

1. Disconnect the C38 actuator connector.
   

2. Disconnect the A27 and A28 ECU connectors.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-1 (HL1) - C38-4 (HL1)	Always	Below 1 Ω
   A27-1 (HL1) - Body ground	Always	100 kΩ or higher
   A27-2 (HL2) - C38-6 (HL2)	Always	Below 1 Ω
   A27-2 (HL2) - Body ground	Always	100 kΩ or higher
   A27-3 (HL3) - C38-5 (HL3)	Always	Below 1 Ω
   A27-3 (HL3) - Body ground	Always	100 kΩ or higher
   A27-16 (NP) - C38-3 (N)	Always	Below 1 Ω
   A27-16 (NP) - Body ground	Always	100 kΩ or higher
   A28-2 (HM1) - C38-1 (HM1)	Always	Below 1 Ω
   A28-2 (HM1) - Body ground	Always	100 kΩ or higher
   A28-6 (HM2) - C38-2 (HM2)	Always	Below 1 Ω
   A28-6 (HM2) - Body ground	Always	100 kΩ or higher
   C38-7 (GND) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Check the high-low transfer shift actuator.

1. Turn the engine switch on (IG).
   

2. Stop the vehicle.
   

3. for Automatic Transmission: Move the shift lever to N.
   for Manual Transmission: Depress the clutch pedal.
   

4. Check that there is an operating noise from the transfer shift actuator when the transfer position switch is turned from H4 to L4, or L4 to H4.
   

   OK:

   There is an operating noise.
   

   HINT:

   1. If the actuator fork cannot move from high to low, or low to high even though there is an operating noise, there may be a mechanical malfunction in the transfer.
      
   2. If there is no operating noise, there may be a malfunction in the high-low transfer shift actuator. However, it may also be a result of a mechanical malfunction in the transfer, so inspect each part.
      

5. Remove the transfer shift actuator assembly (Click here).
   

6. Check the high to low switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the high to low position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the high to low switch is complete, check the neutral position detection switch and limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      3 (N) - 7 (GND)	After high to low switch is complete	100 kΩ or higher
      4 (HL1) - 7 (GND)	After high to low switch is complete	100 kΩ or higher
      5 (HL3) - 7 (GND)	After high to low switch is complete	100 kΩ or higher
      6 (HL2) - 7 (GND)	After high to low switch is complete	Below 1 Ω

      If there is a malfunction, replace the transfer shift actuator assembly.
      

7. Check the low to high switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the low to high position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the low to high switch is complete, check the neutral position detection switch and limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      3 (N) - 7 (GND)	After low to high switch is complete	100 kΩ or higher
      4 (HL1) - 7 (GND)	After low to high switch is complete	Below 1 Ω
      5 (HL3) - 7 (GND)	After low to high switch is complete	100 kΩ or higher
      6 (HL2) - 7 (GND)	After low to high switch is complete	100 kΩ or higher

      If there is a malfunction, replace the transfer shift actuator assembly.
      

Check the harness and connector (ECU - center differential lock actuator).

1. Disconnect the C37 actuator connector.
   

2. Disconnect the A27 and A28 ECU connectors.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-6 (TL1) - C37-4 (TL1)	Always	Below 1 Ω
   A27-6 (TL1) - Body ground	Always	100 kΩ or higher
   A27-7 (TL2) - C37-6 (TL2)	Always	Below 1 Ω
   A27-7 (TL2) - Body ground	Always	100 kΩ or higher
   A27-8 (TL3) - C37-5 (TL3)	Always	Below 1 Ω
   A27-8 (TL3) - Body ground	Always	100 kΩ or higher
   A27-14 (P1) - C37-3 (CDL)	Always	Below 1 Ω
   A27-14 (P1) - Body ground	Always	100 kΩ or higher
   A28-7 (TM2) - C37-2 (TM2)	Always	Below 1 Ω
   A28-7 (TM2) - Body ground	Always	100 kΩ or higher
   A28-8 (TM1) - C37-1 (TM1)	Always	Below 1 Ω
   A28-8 (TM1) - Body ground	Always	100 kΩ or higher
   C37-7 (GND) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Check the center differential lock actuator.

1. Turn the engine switch on (IG).
   

2. Check that there is an operating noise from the transfer shift actuator when the center differential lock switch is pressed to switch from free to lock, or lock to free.
   

   OK:

   There is an operating noise.
   

   HINT:

   1. If the actuator fork cannot move from free to lock, or lock to free even though there is an operating noise, there may be a mechanical malfunction in the transfer.
      
   2. If there is no operating noise, there may be a malfunction in the center differential lock actuator. However, it may also be a result of a mechanical malfunction in the transfer, so inspect each part.
      

3. Remove the transfer shift actuator assembly (Click here).
   

4. Check the free to lock switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the free to lock position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the free to lock switch is complete, check the center differential lock detection switch and limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      3 (CDL) - 7 (GND1)	After free to lock switch is complete	Below 1 Ω
      4 (TL1) - 7 (GND1)	After free to lock switch is complete	100 kΩ or higher
      5 (TL3) - 7 (GND)	After free to lock switch is complete	100 kΩ or higher
      6 (TL2) - 7 (GND1)	After free to lock switch is complete	Below 1 Ω

      If there is a malfunction, replace the transfer shift actuator assembly.
      

5. Check the lock to free switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the lock to free position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the lock to free switch is complete, check the center differential lock detection switch and limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      3 (CDL) - 7 (GND1)	After lock to free switch is complete	100 kΩ or higher
      4 (TL1) - 7 (GND1)	After lock to free switch is complete	100 kΩ or higher
      5 (TL3) - 7 (GND1)	After lock to free switch is complete	Below 1 Ω
      6 (TL2) - 7 (GND1)	After lock to free switch is complete	100 kΩ or higher

      If there is a malfunction, replace the transfer shift actuator assembly.
      

Check the harness and connector (ECU - differential lock shift actuator).

1. Disconnect the f1 actuator connector.
   

2. Disconnect the A27 and A28 ECU connectors.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-9 (RLY1) - f1-6 (RLY1)	Always	Below 1 Ω
   A27-9 (RLY1) - Body ground	Always	100 kΩ or higher
   A27-10 (RLY2) - f1-5 (RLY2)	Always	Below 1 Ω
   A27-10 (RLY2) - Body ground	Always	100 kΩ or higher
   A28-1 (M1) - f1-3 (M1)	Always	Below 1 Ω
   A28-1 (M1) - Body ground	Always	100 kΩ or higher
   A28-5 (M2) - f1-2 (M2)	Always	Below 1 Ω
   A28-5 (M2) - Body ground	Always	100 kΩ or higher
   f1-4 (GND) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Check the harness and connector (ECU - differential lock position switch).

1. Disconnect the f2 differential lock position switch connector.
   

2. Disconnect the A27 ECU connector.
   





3. Measure the resistance according to the value(s) in the table below.
   
   

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A27-15 (RLP) - f2-2 (+B)	Always	Below 1 Ω
   A27-15 (RLP) - Body ground	Always	100 kΩ or higher
   f2-1 (GND) - Body ground	Always	Below 1 Ω

   If there is a malfunction, repair or replace the harness or connector.
   

Check the differential lock shift actuator.

1. Turn the engine switch on (IG).
   

2. Check that there is an operating noise from the differential lock shift actuator when the differential lock switch is switch from OFF to RR (free to lock), or RR to OFF (lock to free).
   

   NOTICE:

   1. Perform this operation when the transfer is in low and the center differential is locked.
      
   2. When locking the rear differential, make sure that the vehicle speed is less than 8 km/h (5 mph).
      

   HINT:

   Perform this operation when the transfer is in low and the center differential is locked.

   OK:

   There is an operating noise.
   

   HINT:

   1. If the actuator fork cannot move from free to lock or lock to free even though there is an operating noise, there may be a mechanical malfunction in the rear differential.
      
   2. If there is no operating noise, there may be a malfunction in the differential lock shift actuator. However, it may also be a result of a mechanical malfunction in the rear differential, so inspect each part.
      

3. Remove the differential lock shift actuator assembly (Click here).
   

4. Check the free to lock switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the free to lock position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the free to lock switch is complete, check the limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      5 (RLY2) - 4 (GND)	After free to lock switch is complete	Below 12.5 Ω
      6 (RLY1) - 4 (GND)	After free to lock switch is complete	500 kΩ or higher

      If there is a malfunction, replace the differential lock shift actuator assembly.
      

5. Check the lock to free switch.
   

   
   
   1. Connect lines via a relay as shown in the illustration, and check that the actuator fork moves from the lock to free position.
      

      NOTICE:

      1. Make sure to perform this inspection with the actuator removed from the vehicle. If this inspection is performed with the actuator installed to the vehicle, the actuator will be damaged.
         
      2. When inspecting the actuator, make sure to operate it with the lines connected via a relay. If the lines are not connected via a relay and battery voltage is directly applied to the actuator, the actuator will be damaged.
         

      HINT:

      When performing the operation described above, use the DEFOG relay.

      
      
      
      
      
      
   2. After the lock to free switch is complete, check the limit switch.
      
   1. Measure the resistance according to the value(s) in the table below.
      

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      5 (RLY2) - 4 (GND)	After lock to free switch is complete	500 kΩ or higher
      6 (RLY1) - 4 (GND)	After lock to free switch is complete	Below 12.5 Ω

      If there is a malfunction, replace the differential lock shift actuator assembly.
      

Inspect the rear differential lock position switch.

1. Remove the rear differential lock position switch (Click here).
   





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

   
   
   
   

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   2 (+B) - 1 (GND)	Pushed	Below 1 Ω
   	Not pushed	100 kΩ or higher

   If there is a malfunction, replace the rear differential lock position switch.
   

Check the four wheel drive control ECU.

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

   
   
   
   
   

   Tester Connection	Terminal Description	Condition	Specified Condition
   A27-1 (HL1) - A28-4 (GND)	High-low transfer shift actuator limit switch	Engine switch on (IG) Transfer in high position	Below 1.5 V
   		Engine switch on (IG) Transfer in low position	11 to 14 V
   		Engine switch on (IG) Transfer in neutral position	11 to 14 V
   A27-2 (HL2) - A28-4 (GND)	High-low transfer shift actuator limit switch	Engine switch on (IG) Transfer in high position	11 to 14 V
   		Engine switch on (IG) Transfer in low position	Below 1.5 V
   		Engine switch on (IG) Transfer in neutral position	11 to 14 V
   A27-3 (HL3) - A28-4 (GND)	High-low transfer shift actuator limit switch	Engine switch on (IG) Transfer in high position	11 to 14 V
   		Engine switch on (IG) Transfer in low position	11 to 14 V
   		Engine switch on (IG) Transfer in neutral position	Below 1.5 V
   A27-5 (TT) - A27-25 (TGND)*1	Temperature sensor	Engine switch on (IG)	0 to 5 V
   A27-6 (TL1) - A28-4 (GND)	Center differential lock actuator limit switch	Engine switch on (IG) Center differential in free position	11 to 14 V
   		Engine switch on (IG) Center differential in lock position	11 to 14 V
   		Engine switch on (IG) Transfer in neutral position	Below 1.5 V
   A27-7 (TL2) - A28-4 (GND)	Center differential lock actuator limit switch	Engine switch on (IG) Center differential in free position	11 to 14 V
   		Engine switch on (IG) Center differential in lock position	Below 1.5 V
   		Engine switch on (IG) Transfer in neutral position	11 to 14 V
   A27-8 (TL3) - A28-4 (GND)	Center differential lock actuator limit switch	Engine switch on (IG) Center differential in free position	Below 1.5 V
   		Engine switch on (IG) Center differential in lock position	11 to 14 V
   		Engine switch on (IG) Transfer in neutral position	11 to 14 V
   A27-9 (RLY1) - A28-4 (GND)*2	Differential lock shift actuator limit switch	Engine switch on (IG) Rear differential in free position	Below 0.5 V
   		Engine switch on (IG) Rear differential in lock position	11 to 14 V
   A27-10 (RLY2) - A28-4 (GND)*2	Differential lock shift actuator limit switch	Engine switch on (IG) Rear differential in free position	11 to 14 V
   		Engine switch on (IG) Rear differential in lock position	Below 0.5 V
   A27-11 (R) - A28-4 (GND)*2	Differential lock switch	Engine switch on (IG) Differential lock switch in OFF position	11 to 14 V
   		Engine switch on (IG) Differential lock switch in RR position	Below 1.5 V
   A27-12 (DL) - A28-4 (GND)	Transfer position switch	Engine switch on (IG) Transfer in high position	11 to 14 V
   		Engine switch on (IG) Transfer in low position	Below 1.5 V
   A27-13 (LO) - A28-4 (GND)	Center differential lock switch	Engine switch on (IG) Center differential lock switch pressed and held	Below 1.5 V
   		Engine switch on (IG) Center differential lock switch not pressed	11 to 14 V
   A27-14 (P1) - A28-4 (GND)	Center differential lock detection switch	Engine switch on (IG) Center differential in free position	11 to 14 V
   		Engine switch on (IG) Center differential in lock position	Below 1.5 V
   A27-15 (RLP) - A28-4 (GND)*2	Rear differential lock position switch	Engine switch on (IG) Rear differential in free position	11 to 14 V
   		Engine switch on (IG) Rear differential in lock position	Below 1.5 V
   A27-16 (NP) - A28-4 (GND)	Transfer shift actuator neutral position detection switch	Engine switch on (IG) Transfer in neutral position	Below 1.5 V
   		Engine switch on (IG) Transfer in high or low position	11 to 14 V
   A27-17 (MTN) - A28-4 (GND)*3	Clutch start switch	Engine switch on (IG) Clutch pedal released	11 to 14 V
   		Engine switch on (IG) Clutch pedal depressed	Below 2 V
   A27-19 (CAN+) - A27-20 (CAN-)	CAN communication line	Engine switch off	54 to 69 Ω
   A27-21 (L4) - A28-4 (GND)	Transfer shift actuator Low detection switch	Transfer position switch in H4 position	11 to 14 V
   		Engine switch on (IG) Transfer position switch in L4 position	Below 1.5 V
   A28-1 (M1) - A28-4 (GND)*2	Differential lock shift actuator motor	Engine switch on (IG) Transfer in low position Center differential in lock position Differential lock switch OFF → RR (During operation of differential lock shift actuator motor from free to lock)	11 to 14 V
   		Engine switch on (IG) Transfer in low position Center differential in lock position Differential lock switch RR → OFF or transfer position switch L4 → H4 (During operation of differential lock shift actuator motor from lock to free)	Below 1.5 V
   A28-2 (HM1) - A28-4 (GND)	High-low transfer shift actuator motor	Engine switch on (IG) Transfer position switch H4 → L4 (During operation of high-low transfer shift actuator motor from high to low)	Below 1.5 V or alternating between below 1.5 V and 11 to 14 V
   		Engine switch on (IG) Transfer position switch L4 → H4 (During operation of high-low transfer shift actuator motor from low to high)	11 to 14 V
   A28-3 (IG) - A28-4 (GND)	IG power	Engine switch on (IG)	11 to 14 V
   A28-4 (GND) - Body ground	Ground	Always	Below 1 Ω
   A28-5 (M2) - A28-4 (GND)*2	Differential lock shift actuator motor	Engine switch on (IG) Transfer in low position Center differential in lock position Differential lock switch OFF → RR (During operation of differential lock shift actuator motor from free to lock)	Below 1.5 V
   		Engine switch on (IG) Transfer in low position Center differential in lock position Differential lock switch RR → OFF or transfer position switch L4 → H4 (During operation of differential lock shift actuator motor from lock to free)	11 to 14 V
   A28-6 (HM2) - A28-4 (GND)	High-low transfer shift actuator motor	Engine switch on (IG) Transfer position switch H4 → L4 (During operation of high-low transfer shift actuator motor from high to low)	11 to 14 V
   		Engine switch on (IG) Transfer position switch L4 → H4 (During operation of high-low transfer shift actuator motor from low to high)	Below 1.5 V or alternating between below 1.5 V and 11 to 14 V
   A28-7 (TM2) - A28-4 (GND)	Center differential lock actuator motor	Engine switch on (IG) Center differential position free → lock	Below 1.5 V or alternating between below 1.5 V and 11 to 14 V
   		Engine switch on (IG) Center differential position lock → free	11 to 14 V
   A28-8 (TM1) - A28-4 (GND)	Center differential lock actuator motor	Engine switch on (IG) Center differential position free → lock	11 to 14 V
   		Engine switch on (IG) Center differential position lock → free	Below 1.5 V or alternating between below 1.5 V and 11 to 14 V

   If there is a malfunction, inspect the harnesses, connectors, transfer position switch, center differential lock switch, and transfer shift actuator assembly. If these are normal, replace the four wheel drive control ECU (Click here).
   

   HINT:

   1. *1: w/ Temperature Sensor
      
   2. *2: w/ Rear Differential Lock
      
   3. *3: for Manual Transmission