Alternator

[Flashard]

Testing, and what requires removing to change the alternator on a 2005 Avensis 1.8 Petrol 

[xzirri]

To remove it, you need to disconnect the Battery, all the cables going to your alternator, the auxiliary belt and the two bolts retaining the alternator. There may also be a screw for some sorts of cable management clip on the alternator as well. You may have to pry the alternator off the engine with a crowbar after you have removed all the bolts, as they can be stuck.

One quite basic test is to measure the voltage at the Battery with the engine off and then with the engine on. You can also measure the voltage between the alternator and the Battery as well.

If you search the forum I'm sure you will find some further answers to your questions.