Belt diagram and alternator fan

Welcome to 2CarPros.

Here is a link that includes both timing belt and the accessory drive belt routing:

https://www.2carpros.com/diagrams/nissan/xterra/2003

Here are the directions for the cooling fan. The attached pictures correlate with the directions.

2003 Nissan-Datsun Truck Xterra 2WD L4-2.4L (KA24DE)
Procedures
Vehicle Engine, Cooling and Exhaust Cooling System Radiator Cooling Fan Service and Repair Procedures
PROCEDURES
COOLING FAN (CRANKSHAFT DRIVEN)
Removal and Installation

pic 1

Do not release the drive belt tension by removing the fan/water pump pulley.
Fan coupling cannot be disassembled and should be replaced as a unit. If front mark F is present, install fan so that side marked F faces the front.
Install the drive belt only after the fan and fan coupling to water pump flange bolts/nuts have been properly tightened.
Proper alignment of these components is essential. Improper alignment will cause them to wobble and may eventually cause the fan to separate from the water pump, causing extensive damage.

Inspection

WARNING: When the engine is running, keep hands and clothing away from moving parts such as drive belts and fan.

pic 2

Check fan coupling for rough operation, wobbling, oil leakage or bent bimetal fins.

pic 3

After assembly, verify the fan does not wobble or flap while the engine is running.

Let me know if this helps.

Take care,
Joe