Sequoia 4WD V8-5.7L (3UR-FE) (2009)
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Four Wheel Drive Selector Switch: Testing and Inspection
4WD Control Switch
JF3A TRANSFER / 4WD / AWD: 4WD CONTROL SWITCH: ON-VEHICLE INSPECTION
ON-VEHICLE INSPECTION
1. INSPECT 4WD CONTROL SWITCH
(a) Check the harness and connector (ECU - battery and body ground).
(1) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
If there is a malfunction, inspect the harness or connector. If the harness is malfunctioning, repair or replace harness or connector. If the
harness or connector is normal, replace the 4WD control ECU See: Relays and Modules - Transmission and Drivetrain/Relays and
Modules - Transfer Case/Control Module/Service and Repair/Removal.
Standard Resistance:
If there is a malfunction, repair or replace the harness or connector.
(b) Check the harness and connector (switch - ECU).
(1) Disconnect the A25 ECU connector.
(2) Disconnect the L1 switch connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
