Drivetrain - 4WD Indicator Flashing/4WD Inoperative

T-SB-0066-12

April 25, 2012

Automatic Disconnecting Differential (A.D.D.) Shift
Actuator Inoperative

Service Category
Drivetrain

Section
Transfer/4wd/Awd

Market
USA





Applicability

Introduction
Some 2003 - 2012 model year 4Runner, 2007 - 2012 model year FJ Cruiser, and 2005 - 2012 model year Tacoma vehicles equipped with part-time 4WD may exhibit a flashing 4WD indicator light and inoperative 4WD system. Follow the procedures in the bulletin to address this condition.





Parts Information





Warranty Information





Required Tools & Equipment

Repair Procedure

1. Confirm the 4WD system is inoperative and the 4WD light is flashing.

2. Remove the A.D.D. actuator assembly.





Refer to the Technical Information System (TIS), applicable model and model year Repair Manual:

3. Perform A.D.D. actuator movement and resistance inspection per the Repair Manual.








Refer to TIS, applicable model and model year Repair Manual:

4. Replace the A.D.D. actuator.








Refer to TIS, applicable model and model year Repair Manual:

5. Confirm the repair and 4WD system operation.