TRANSFER SYSTEM INSPECTION

PROCEDURE

  1. INSPECT INDICATOR LIGHT

    1. 4LO Indicator Light:

      1. Turn the engine switch on (IG).

      2. Move the shift lever to N (vehicle is stopped).

      3. Change the transfer position switch from H4 to L4.

      4. Check the 4LO indicator light.

        OK

        4LO indicator light comes on or 4LO indicator light comes on after blinking.

        If the result is not as specified, inspect the switch, four wheel drive control ECU and transfer shift actuator assembly.

        If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In this case, first check the CAN communication system (Click here). Then check the combination meter (Click here).

    2. Center Differential Lock Indicator Light:

      1. Turn the engine switch on (IG).

      2. Change the center differential lock switch from Free to Lock.

      3. Check the center differential lock indicator light.

        OK

        Center differential lock indicator light comes on

        If the result is not as specified, inspect the switches, four wheel drive control ECU, transfer and shift actuator.

        If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In this case, first check the CAN communication system (Click here). Then check the combination meter (Click here).

  2. INSPECT 4 WHEEL DRIVE CONTROL ECU NO.2 (POWER SUPPLY)

    1. C217417C11

      *a

      Component with harness connected

      (Four Wheel Drive Control ECU)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G42-3 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      If the result is not as specified, inspect the harness, fuse or connector. If the harness or connector is malfunctioning, repair or replace the harness or connector. If the harness or connector is normal, replace the four wheel drive control ECU (Click here).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G42-4 (GND) - Body ground

      Always

      Below 1 Ω

      If the result is not as specified, repair or replace the harness or connector.

  3. INSPECT 4 WHEEL DRIVE CONTROL ECU NO.2 (TRANSFER POSITION SWITCH)

    1. C217417C12

      *a

      Component with harness connected

      (Four Wheel Drive Control ECU)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G41-13 (LO) - Body ground

      Engine switch on (IG)

      Transfer position switch H4

      10.5 to 14 V

      Engine switch on (IG)

      Transfer position switch L4

      Below 1.5 V

      If the result is not as specified, check the power supply.

      If the power supply is normal, inspect the transfer position switch (Click here).

  4. INSPECT FOUR WHEEL DRIVE CONTROL ECU (CENTER DIFFERENTIAL LOCK SWITCH))

    1. C217417C13

      *a

      Component with harness connected

      (Four Wheel Drive Control ECU)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G41-16 (DL) - Body ground

      Engine switch on (IG)

      Center differential lock switch ON

      Below 1.5 V

      Engine switch on (IG)

      Center differential lock switch OFF

      9.5 to 14 V

      If the result is not as specified, check the power supply.

      If the power supply is normal, inspect the center differential lock switch (Click here).

  5. INSPECT MULTI MODE TRANSFER SHIFT ACTUATOR

    1. Check the harness and connector between four wheel drive control ECU and transfer shift actuator assembly (multi mode transfer shift actuator).

      1. Disconnect the C34 actuator connector.

      2. Disconnect the G41 and G42 ECU connectors.

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

        C217418C05

        *a

        Front view of wire harness connector

        (to Four Wheel Drive Control ECU)

        *b

        Front view of wire harness connector

        (to Transfer Shift Actuator Assembly)

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        G41-7 (TL2) - C34-4 (TL2)

        Always

        Below 1 Ω

        G41-7 (TL2) - Body ground

        Always

        100 kΩ or higher

        G41-8 (TL3) - C34-5 (TL3)

        Always

        Below 1 Ω

        G41-8 (TL3) - Body ground

        Always

        100 kΩ or higher

        G41-14 (P1) - C34-9 (CDL)

        Always

        Below 1 Ω

        G41-14 (P1) - Body ground

        Always

        100 kΩ or higher

        G42-7 (TM2) - C34-1 (TM2)

        Always

        Below 1 Ω

        G42-7 (TM2) - Body ground

        Always

        100 kΩ or higher

        G42-8 (TM1) - C34-2 (TM1)

        Always

        Below 1 Ω

        G42-8 (TM1) - Body ground

        Always

        100 kΩ or higher

        C34-6 (GND1) - Body ground

        Always

        Below 1 Ω

        C34-10 (GND) - Body ground

        Always

        Below 1 Ω

        If the result is not as specified, repair or replace the harness or connector.

        If the harness or connector is normal, check the ECU output voltage.

    2. Check the four wheel drive control ECU (multi mode transfer shift actuator circuit).

      1. Connect the G41 and G42 ECU connectors.

      2. Connect the C34 actuator connector.

      3. C217417C14

        *a

        Component with harness connected

        (Four Wheel Drive Control ECU)

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

        Standard Voltage

        Tester Connection

        Switch Condition

        Specified Condition

        G42-8 (TM1) - G42-4 (GND)

        Engine switch on (IG)

        Center differential lock switch FREE → LOCK (During operation of multi mode transfer shift actuator motor from FREE to LOCK)

        10 to 14 V

        Engine switch on (IG)

        Center differential lock switch FREE → LOCK (Multi mode transfer shift actuator motor stopped)

        Below 1.5 V

        G42-7 (TM2) - G42-4 (GND)

        Engine switch on (IG)

        Center differential lock switch LOCK → FREE (During operation of multi mode transfer shift actuator motor from LOCK to FREE)

        10 to 14 V

        Engine switch on (IG)

        Center differential lock switch LOCK → FREE (Multi mode transfer shift actuator motor stopped)

        Below 1.5 V

        G41-7 (TL2) - G42-4 (GND)

        Engine switch on (IG)

        Center differential lock switch LOCK

        Below 1.5 V

        Engine switch on (IG)

        Center differential lock switch FREE

        10.5 to 14 V

        G41-8 (TL3) - G42-4 (GND)

        Engine switch on (IG)

        Center differential lock switch LOCK

        10.5 to 14 V

        Engine switch on (IG)

        Center differential lock switch FREE

        Below 1.5 V

        G41-14 (P1) - G42-4 (GND)

        Engine switch on (IG)

        Center differential lock switch FREE

        9.5 to 14 V

        Engine switch on (IG)

        Center differential lock switch LOCK

        Below 1.5 V

        If the result is not as specified, determine if a malfunction is on the ECU side or actuator side by disconnecting the connector of the transfer shift actuator, and then check the ECU output voltage.

    3. Check the four wheel drive control ECU output voltage.

      1. Disconnect the C34 actuator connector.

      2. Connect the G41 and G42 ECU connectors.

      3. C217419C05

        *a

        Front view of wire harness connector

        (to Transfer Shift Actuator Assembly)

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

        Standard Voltage

        Tester Connection

        Switch Condition

        Specified Condition

        C34-9 (CDL) - C34-6 (GND1)

        Engine switch on (IG)

        9.5 to 14 V

        C34-4 (TL2) - C34-6 (GND1)

        Engine switch on (IG)

        10.5 to 14 V

        C34-5 (TL3) - C34-6 (GND1)

        Engine switch on (IG)

        10.5 to 14 V

        If the result is not as specified, replace the four wheel drive control ECU (Click here).

        If the voltage is normal, inspect the multi mode transfer shift actuator, because the voltage applied to the motor cannot be measured.

    4. Inspect the multi mode transfer shift actuator (transfer shift actuator assembly).

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

      2. Check the LOCK to FREE switch.

        Connect lines via a relay as shown in the illustration, then check that the actuator fork moves from the LOCK to FREE position.

        Note:

        • 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, 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.

        Tip:

        When performing the operation described above, use the DEF relay on the main body ECU (instrument panel junction block).

        C218269C04

        *1

        DEF Relay

        -

        -

        *a

        Component without harness connected

        (Transfer Shift Actuator Assembly)

        *b

        LOCK to FREE

        1. After the LOCK to FREE switch is complete, inspect the center differential lock detection switch and limit switch.

          Standard Resistance

          Tester Connection

          Switch Condition

          Specified Condition

          4 (TL2) - 6 (GND1)

          After LOCK to FREE switch is complete

          0.5 MΩ or higher

          5 (TL3) - 6 (GND1)

          After LOCK to FREE switch is complete

          Below 12.5 Ω

          9 (CDL) - 10 (GND)

          After LOCK to FREE switch is complete

          0.5 MΩ or higher

      3. Check the FREE to LOCK switch.

        Connect lines via a relay as shown in the illustration, then check that the actuator fork moves from the FREE to LOCK position.

        C218270C03

        *1

        DEF Relay

        -

        -

        *a

        Component without harness connected

        (Transfer Shift Actuator Assembly)

        *b

        FREE to LOCK

        1. After the FREE to LOCK switch is complete, inspect the center differential lock detection switch and limit switch.

          Standard Resistance

          Tester Connection

          Switch Condition

          Specified Condition

          4 (TL2) - 6 (GND1)

          After FREE to LOCK switch is complete

          Below 12.5 Ω

          5 (TL3) - 6 (GND1)

          After FREE to LOCK switch is complete

          0.5 MΩ or higher

          9 (CDL) - 10 (GND)

          After FREE to LOCK switch is complete

          Below 12.5 Ω

          If the result is not as specified, replace the transfer shift actuator assembly (Click here). If the transfer shift actuator assembly is normal, replace the four wheel drive control ECU (Click here).

  6. INSPECT HIGH-LOW TRANSFER SHIFT ACTUATOR

    1. Check the harness and connector between four wheel drive control ECU and transfer shift actuator (high-low transfer shift actuator).

      1. Disconnect the C34 actuator connector.

      2. Disconnect the G41 and G42 ECU connector.

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

        C217418C06

        *a

        Front view of wire harness connector

        (to Four Wheel Drive Control ECU)

        *b

        Front view of wire harness connector

        (to Transfer Shift Actuator Assembly)

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        G41-1 (HL1) - C34-12 (HL1)

        Always

        Below 1 Ω

        G41-1 (HL1) - Body ground

        Always

        100 kΩ or higher

        G41-2 (HL2) - C34-11 (HL2)

        Always

        Below 1 Ω

        G41-2 (HL2) - Body ground

        Always

        100 kΩ or higher

        G42-2 (HM1) - C34-8 (HM1)

        Always

        Below 1 Ω

        G42-2 (HM1) - Body ground

        Always

        100 kΩ or higher

        G42-6 (HM2) - C34-7 (HM2)

        Always

        Below 1 Ω

        G42-6 (HM2) - Body ground

        Always

        100 kΩ or higher

        C34-10 (GND) - Body ground

        Always

        Below 1 Ω

        If the result is not as specified, repair or replace the harness or connector.

        If the harness or connector is normal, check the ECU output voltage.

    2. Check the four wheel drive control ECU (high-low transfer shift actuator circuit).

      1. Connect the G41 and G42 ECU connectors.

      2. Connect the C34 actuator connector.

      3. C217417C15

        *a

        Component with harness connected

        (Four Wheel Drive Control ECU)

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

        Standard Voltage

        Tester Connection

        Switch Condition

        Specified Condition

        G42-6 (HM2) - G42-4 (GND)

        Engine switch on (IG)

        Transfer position switch L4 → H4 (During operation of high-low transfer shift actuator motor from LOW to HIGH)

        10 to 14 V

        Engine switch on (IG)

        Transfer position switch L4 → H4 (High-low transfer shift actuator motor stopped)

        Below 1.5 V

        G42-2 (HM1) - G42-4 (GND)

        Engine switch on (IG)

        Transfer position switch H4 → L4 (During operation of high-low transfer shift actuator motor from HIGH to LOW)

        10 to 14 V

        Engine switch on (IG)

        Transfer position switch H4 → L4 (High-low transfer shift actuator motor stopped)

        Below 1.5 V

        G41-1 (HL1) - G42-4 (GND)

        Engine switch on (IG)

        Transfer position switch H4

        10.5 to 14 V

        Engine switch on (IG)

        Transfer position switch L4

        Below 1.5 V

        G41-2 (HL2) - G42-4 (GND)

        Engine switch on (IG)

        Transfer position switch H4

        Below 1.5 V

        Engine switch on (IG)

        Transfer position switch L4

        10.5 to 14 V

        If the result is not as specified, determine if the malfunction is on the ECU side or actuator side by disconnecting the connector of the transfer shift actuator, and then check the ECU output voltage.

    3. Check the four wheel drive control ECU output voltage.

      1. Connect the G41 and G42 ECU connectors.

      2. Disconnect the C34 actuator connector.

      3. C217419C06

        *a

        Front view of wire harness connector

        (to Transfer Shift Actuator Assembly)

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

        Standard Voltage

        Tester Connection

        Switch Condition

        Specified Condition

        C34-11 (HL2) - C34-10 (GND)

        Engine switch on (IG)

        10.5 to 14 V

        C34-12 (HL1) - C34-10 (GND)

        Engine switch on (IG)

        10.5 to 14 V

        If the result is not as specified, replace the four wheel drive control ECU (Click here).

        If the voltage is normal, inspect the high-low transfer shift actuator, because the voltage applied to the motor cannot be measured.

    4. Inspect the high-low transfer shift actuator (transfer shift actuator assembly).

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

      2. Check the HIGH to LOW switch.

        Connect lines via a relay as shown in the illustration, then check that the actuator fork moves from the HIGH to LOW position.

        Note:

        • 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, 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.

        Tip:

        When performing the operation described above, use the DEF relay on the main body ECU (instrument panel junction block).

        C218271C03

        *1

        DEF Relay

        -

        -

        *a

        Component without harness connected

        (Transfer Shift Actuator Assembly)

        *b

        HIGH to LOW

        1. After the HIGH to LOW switch is complete, inspect the limit switch.

          Standard Resistance

          Tester Connection

          Switch Condition

          Specified Condition

          12 (HL1) - 10 (GND)

          After HIGH to LOW switch is complete

          Below 12.5 Ω

          11 (HL2) - 10 (GND)

          After HIGH to LOW switch is complete

          0.5 MΩ or higher

      3. Check the LOW to HIGH switch.

        Connect lines via a relay as shown in the illustration, then check that the actuator fork moves from the LOW to HIGH position.

        C218272C03

        *1

        DEF Relay

        -

        (Transfer Shift Actuator Assembly)

        *a

        Component without harness connected

        (Transfer Shift Actuator Assembly)

        *b

        LOW to HIGH

        1. After the LOW to HIGH switch is complete, inspect the limit switch.

          Standard Resistance

          Tester Connection

          Switch Condition

          Specified Condition

          12 (HL1) - 10 (GND)

          After LOW to HIGH switch is complete

          0.5 MΩ or higher

          11 (HL2) - 10 (GND)

          After LOW to HIGH switch is complete

          Below 12.5 Ω

          If the result is not as specified, replace the transfer shift actuator assembly (Click here). If the transfer shift actuator assembly is normal, replace the four wheel drive control ECU (Click here).