Q: How to remove and install the alternator on Toyota Sienna?
A: To expel the alternator on 2006 and prior years you have to initially disconnecting the negative cable from the battery then reaming the electrical connectors from the alternator. Relax the alternator setting and centering screws, with the former removing the centering bolt, and the latter removing the lock bolt followed by the pivot bolt, and finally tightening the setting screw in anti clock wise direction until the drive belt tension is released and the belt can be removed. To detach the alternator from the engine bracket and the adjustment bracket, unscrew the adjustment and pivot bolts. Starting with the 2007 models, first, remove the engine cover, then open the hood, and loosen the lug nuts on the right front wheel, using the car's jack and jack stands, raise the Ford properly, then, remove the right front wheel. First, remove the engine lower splash shield and the right inner fender splash shield, next drain the engine coolant, and remove both air filter inlet tubes and the battery. Move on to the front bumper and energy absorber, then to the radiator and cooling fan unit, and, finally, cut the serpentine drive belt. The wiring, that is connected to the alternator including the air conditioning compressor wiring, should be disconnected, the bolts from the front of the alternator should be removed as well as the bolt at the rear bracket, the remaining wiring harness clamp should be disconnected and the alternator should then be lifted off. When fitting a new or rebuilt alternator, the terminal number size and location and ,identification marks, should be the same to that of the old unit. If needed, replace the pulley from the old alternator to a new one; also, find out the policy for pulley installation from the shop. This is done in the reverse procedure to removal and after reinstalling, you should tension the drive belt and check the charging voltage of the alternator.