4WD CONTROL SWITCH ON-VEHICLE INSPECTION


  1. INSPECT TRANSFER POSITION SWITCH


    1. Check the harness and connector four wheel drive control ECU - battery and body ground).


      1. A0099QBE07
        Text in Illustration
        *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
        G54-3 (IG) - Body ground Ignition switch ON 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
        G54-4 (GND) - Body ground Always Below 1 Ω

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

    2. Check the harness and connector (transfer position switch - four wheel drive control ECU).


      1. Disconnect the G53 ECU connector.

      2. Disconnect the G18 switch connector.

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

        A00991ZE03
        Standard Resistance
        for 1GR-FE, 1KD-FTV
        Tester Connection Condition Specified Condition
        G18-2 (LO) - G53-13 (LO) Always Below 1 Ω
        G18-2 (LO) - Body ground Always 100 kΩ or higher
        G18-4 (GND) - Body ground Always Below 1 Ω
        for 2TR-FE, 5L-E
        Tester Connection Condition Specified Condition
        G18-2 (LO) - G53-13 (LO) Always Below 1 Ω
        G18-2 (LO) - Body ground Always 100 kΩ or higher
        G18-4 (GND) - Body ground Always Below 1 Ω
        G18-5 (HI) - G53-11 (2-4) Always Below 1 Ω
        G18-5 (HI) - Body ground Always 100 kΩ or higher
        Text in Illustration
        *A for 2TR-FE, 5L-E - -
        *a

        Front view of wire harness connector

        (to Transfer Position Switch)

        		 *b

        Front view of wire harness connector

        (to Four Wheel Drive Control ECU)

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

    3. Check the transfer position switch.


      1. Turn the ignition switch off.

      2. Connect the G18 switch connector.

      3. Connect the G53 ECU connector.

      4. A0099QBE14
        Text in Illustration
        *A for 2TR-FE, 5L-E
        *a

        Component with harness connected

        (Four Wheel Drive Control ECU)

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

        Standard Voltage
        for 1GR-FE, 1KD-FTV
        Tester Connection Switch Condition Specified Condition
        G53-13 (LO) - Body ground

        Ignition switch ON

        Transfer position switch H4

        		 10.5 to 14 V

        Ignition switch ON

        Transfer position switch L4

        		 Below 1.5 V
        for 2TR-FE, 5L-E
        Tester Connection Switch Condition Specified Condition
        G53-11 (2-4) - Body ground

        Ignition switch ON

        Transfer position switch H4F

        		 Below 1.5 V

        Ignition switch ON

        Transfer position switch H4L

        		 Below 1.5 V

        Ignition switch ON

        Transfer position switch L4L

        		 10.5 to 14 V
        G53-13 (LO) - Body ground

        Ignition switch ON

        Transfer position switch H4F

        		 10.5 to 14 V

        Ignition switch ON

        Transfer position switch H4L

        		 Below 1.5 V

        Ignition switch ON

        Transfer position switch L4L

        		 Below 1.5 V

        If the result is not as specified, check the four wheel drive control ECU.

    4. Check the four wheel drive control ECU.


      1. Disconnect the G18 switch connector.

      2. A0096T2E03
        Text in Illustration
        *A for 2TR-FE, 5L-E
        *a

        Front view of wire harness connector

        (to Transfer Position Switch)

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

        Standard Voltage
        for 1GR-FE, 1KD-FTV
        Tester Connection Switch Condition Specified Condition
        G18-2 (LO) - Body ground Ignition switch ON 10.5 to 14 V
        for 2TR-FE, 5L-E
        Tester Connection Switch Condition Specified Condition
        G18-2 (LO) - Body ground Ignition switch ON 10.5 to 14 V
        G18-5 (HI) - Body ground Ignition switch ON 10.5 to 14 V

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

        If the result is normal, replace the transfer position switch Click here.