TRANSFER SYSTEM INSPECTION


  1. INSPECT INDICATOR LIGHT


    1. 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.


        • A0159P1E01

          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.

        • A0155MBE01

          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.

          Tech Tips

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

    2. Check the center differential lock indicator light.


      1. Start the engine.

      2. A0157U3

        Push the center differential lock switch.

        Note


        • Do not push the switch while the vehicle is turning.

        • 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.

    3. 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.

        Tech Tips

        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.

        Note

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

      6. A015775E01

        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.

        Tech Tips


        • The 4LO indicator light and center differential lock indicator light are both illuminated.

        • 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.

  2. INSPECT FUSE


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

    2. 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

      If a fuse is blown, inspect the harness connected to the fuse for a short circuit, and repair or replace the harness or replace the fuse.

  3. INSPECT TRANSFER POSITION SWITCH


    1. Remove the transfer position switch Click here.

    2. A015DIXE01

      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

      If there is a malfunction, replace the transfer position switch.

    3. 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.

        A0155AYE02
        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.

  4. INSPECT CENTER DIFFERENTIAL LOCK SWITCH


    1. Remove the center differential lock switch Click here.

    2. A015C13E01

      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

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

    3. 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.

        A015A84E01
        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.

  5. INSPECT DIFFERENTIAL LOCK SWITCH (w/ Rear Differential Lock)


    1. Remove the differential lock switch Click here.

    2. A015AGLE01

      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

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

    3. 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.

        A015C21E01
        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.

  6. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (HIGH-LOW TRANSFER SHIFT ACTUATOR)

    Tech Tips

    After inspecting the ECU power supply or transfer position switch, check the high-low transfer shift actuator.


    1. 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.

        A0156XDE03
        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.

    2. 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.

        Tech Tips


        • 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.

        • 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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A015CXRE01

        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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A015CKOE01

        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.

  7. INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (CENTER DIFFERENTIAL LOCK ACTUATOR)

    Tech Tips

    After inspecting the ECU power supply or center differential lock switch, inspect the center differential lock actuator.


    1. 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.

        A015DWBE04
        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.

    2. 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.

        Tech Tips


        • 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.

        • 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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A0159H2E01

        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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A0156MWE01

        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.

  8. INSPECT DIFFERENTIAL LOCK SHIFT ACTUATOR (w/ Rear Differential Lock)

    Tech Tips

    After inspecting the transfer position switch, transfer shift actuator and differential lock switch, check the differential lock shift actuator.


    1. 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.

        A0158H6E01
        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.

    2. 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.

        A015CKVE01
        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.

    3. 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).

        Note


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

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

        Tech Tips

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

        OK
        There is an operating noise.

        Tech Tips


        • 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.

        • 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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A015COKE01

        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.

          Note


          • 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.

          • 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.

          Tech Tips

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

          A015CQ5E01

        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.

    4. 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.

        A0158LDE01
        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.

  9. INSPECT 4 WHEEL DRIVE CONTROL ECU


    1. Check the four wheel drive control ECU.


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

        A015CL2E03
        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.

        Tech Tips


        • *1: w/ Temperature Sensor

        • *2: w/ Rear Differential Lock

        • *3: for Manual Transmission