Source: NissanHelp

1. Remove undercover.

2. Fully loosen each belt.  Remove generator and air conditioner compressor belt and then power steering oil pump belt.

a. Loosen idler pulley lock nut (A)

b. Loosen adjusting bolt (B).

c. Remove Alternator and Compressor belt

d. Loosen adjusting bolt (C).

e. Loosen power steering oil pump bolt (D). NOTE: Bolt head (D) is at the engine rear side.

f. Adjust by turning the adjusting bolt (E).

g. Remove Power Steering belt.

3. Install in reverse order.