On-Vehicle Inspection [08/2019 - ]: Procedure

WARNING: This page is about a different car, the 2024 Toyota 4Runner, 2023 Toyota 4Runner, 2022 Toyota 4Runner, 2021 Toyota 4Runner, and 2020 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT TRANSFER POSITION SWITCH

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

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

Tester Connection	Switch Condition	Specified Condition
F46-4 (IG) - Body ground	Ignition switch ON	11 to 14 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Four Wheel Drive Control ECU)

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 (Refer to REMOVAL [08/2019 - ] ).

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

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

Standard resistance

Tester Connection	Condition	Specified Condition
F46-10 (GND) - Body ground	Always	Below 1 Ω

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

Disconnect the F47 four wheel drive control ECU connector.
Disconnect the F91 transfer position switch connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

Front view of wire harness connector
(to Transfer Position Switch)

Front view of wire harness connector
(to Four Wheel Drive Control ECU)

Standard resistance

Tester Connection	Condition	Specified Condition
F91-5 (LO) - F47-13 (LO)	Always	Below 1 Ω
F91-5 (LO) - Body ground	Always	100 kΩ or higher
F91-3 (GND) - Body ground	Always	Below 1 Ω
F91-1 (2-4) - F47-14 (2-4)	Always	Below 1 Ω
F91-1 (2-4) - Body ground	Always	100 kΩ or higher

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

Check the transfer position switch.

Turn the ignition switch off.
Connect the F91 transfer position switch connector.
Connect the F47 four wheel drive control ECU connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

Tester Connection	Switch Condition	Specified Condition
F47-14 (2-4) - Body ground	Ignition switch ON Transfer position switch H2	Below 1.5 V
	Ignition switch ON Transfer position switch H4	Below 1.5 V
	Ignition switch ON Transfer position switch L4	10.5 to 14 V
F47-13 (LO) - Body ground	Ignition switch ON Transfer position switch H2	10.5 to 14 V
	Ignition switch ON Transfer position switch H4	Below 1.5 V
	Ignition switch ON Transfer position switch L4	Below 1.5 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Four Wheel Drive Control ECU)

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

Check the four wheel drive control ECU.

Disconnect the F91 transfer position switch connector.

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

Standard voltage

Tester Connection	Switch Condition	Specified Condition
F91-1 (2-4) - Body ground	Ignition switch ON	10.5 to 14 V
F91-5 (LO) - Body ground	Ignition switch ON	10.5 to 14 V

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Transfer Position Switch)

Connect the F91 transfer position switch connector.
If the voltage is not as specified, replace the four wheel drive control ECU (Refer to REMOVAL [08/2019 - ] ). If the voltage is normal, replace the transfer position switch (Refer to REMOVAL [08/2019 - ] ).