Belt come off the engine

It depends on the engine size for the belt routing.

Click on the "x" for the diagrams on the following engine sizes:
FIRING ORDER AND BELT ROUTING Firing Order and Belt Routing X90, Vitara & Grand Vitara Fig. 1: 1998 1.6L engine Firing order: 1-3-4-2 Distributor rotation: Counterclockwise
Fig. 2: 1999-02 1.6L engine Firing order: 1-3-4-2 Distributorless ignition system (coils over No. 2 and 4 cylinders)
Fig. 3: 2.0L engine Firing order: 1-3-4-2 Distributorless ignition system (one coil over each cylinder)
Fig. 4: Accessory V-belt routing- 1.6L engine with A/C
Fig. 5: Accessory V-belt routing-1.6L engine with A/C and P/S
Fig. 6: Accessory V-belt routing-1.6L engine with P/S
Fig. 7: Accessory serpentine belt routing-1.8L and 2.0L engines
Fig. 8: Accessory V-belt routing-1.8L and 2.0L engines
Fig. 9: Accessory V-belt routing-2.5L engine with P/S
Fig. 10: Accessory V-belt routing-2.5L engine with A/C and P/S

complete procedures are posted at AutoZone.com: http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c152802619fd

Do you mean timing belt ot serpentine (accessory) belt?
Belt diagrams are below:


Fig. Belt routings on the 1FZ-FE engine



Fig. Belt routings on the 3RZ-FE engine



Fig. Belt routings on the 5VZ-FE engine
2UZ-FE Engine
To remove the serpentine belt on the 2UZ-FE engine, position a suitable sized wrench or ratchet and socket over the belt tensioner bolt, rotate the tensioner counterclockwise to release the belt tension, then remove the belt. The pulley bolt for the tensioner has a left-hand thread.
When installing the belt, make sure it fits properly in the ribbed grooves and check to be sure the belt has NOT slipped out of the groove on the bottom of the pulley.



Fig. On the 2UZ-FE engine, rotate the belt tensioner counterclockwise to release the belt tension

Fig. Accessory drive belt routing-2.4L engine







Fig. Accessory drive belt routing-2.7L (3RZ-FE/M) engine








Fig. Accessory drive belt routing-2.7L (2TR-FE) engine








Fig. Accessory drive belt routing-3.4L engine







Fig. Accessory drive belt routing-4.0L engine

Hope helps (remember rated this).

1.5L And 1.6L Engines



Fig. Proper pulley alignment for timing belt installation at TDC-Hyundai 1.5L DOHC engines




Fig. Proper pulley alignment for timing belt installation at TDC-Hyundai 1.5L SOHC engines



1.5L Engines



Fig. Proper pulley alignment for timing belt installation at TDC-Hyundai 1.5L DOHC engines




Fig. Proper pulley alignment for timing belt installation at TDC-Hyundai 1.5L SOHC engines




Fig. Proper pulley alignment for timing belt installation at TDC-Hyundai 1.5L SOHC engines, 1.6L similar



1.8L (VIN M) And 2.0L (VIN F) Engines



Fig. Proper alignment of the timing belt alignment marks for belt removal and installation-Hyundai 1.8L and 2.0L (VIN F) engines



2.0L (VIN P) Engines



Fig. Oil pump and crankshaft inner timing belt sprocket alignment marks-Hyundai 2.0L (VIN P) engines




Fig. Timing belt sprocket alignment mark locations and positioning for belt removal and installation-Hyundai 2.0L (VIN P) engines



3.0L (VIN G)



Fig. Installation of the timing belt-3.0L (VIN G) engine







Fig. Timing belt sprocket alignment mark positioning for belt removal and installation-Hyundai 3.0L engine


Hope this helped (remember comment and rated this post).

Fig. Serpentine accessory drive belt routing-3.0L (VIN U) engine


Fig. Serpentine accessory drive belt routing-3.0L (VIN S) engine


Fig. Serpentine accessory drive belt routing-Ford 3.0L (VIN U) engines


Fig. Serpentine accessory drive belt routing-Ford 3.0L (VIN S) engine


Fig. Serpentine accessory drive belt routing-Ford 3.4L SHO engine


Fig. Water pump drive belt routing-Ford 3.4L SHO engine
i wasnt sure what engine you had hope this helps good luck

Like a lot of people...you didn't post your engine size....so out of these 11 photos, please choose the correct one for your application:


Accessory drive belt routing—1.8L (AEB/ATW/AWM) engines


Accessory drive belt routing—1.8L (AWP/AWV/AWW) engines 2.0L (AEG/AVH/AZG/BDC) engines without A/C


Accessory drive belt routing—1.9L diesel (ALH) engines without A/C


Accessory drive belt routing—1.9L diesel (ALH) engines with A/C


Accessory drive belt routing—1.8L (AWP/AWV/AWW) engines 2.0L (AEG/AVH/AZG/BDC) engines with A/C


Accessory drive belt routing—2.0L (ABA) engine without A/C


Accessory drive belt routing—2.0L (ABA) engine with A/C


Accessory drive belt routing—2.5L (BGP) engine with A/C


Accessory drive belt routing—2.8L (AFP/BDF) engines


Accessory drive belt routing—2.8L (ATQ) engines


Accessory drive belt routing—4.0L (BDP) engine

You didn't list your motor size so please pick the applicable diagram:


Accessory serpentine belt routing—4.8L, 5.3L & 6.0L engines


Accessory serpentine belt routing—5.7L engines with A/C


Accessory serpentine belt routing—5.7L engines without A/C


Accessory serpentine belt routing—6.5L Diesel engines


Accessory serpentine belt routing—7.4L engines


Accessory serpentine belt routing—8.1L engines

Removal & Installation

1. Raise and support the vehicle.
   
2. Remove the engine splash shield.
   
3. Rotate the drive belt tensioner clockwise to release the drive belt tension.
   
4. Remove the drive belt from the alternator.
   
5. Slowly release the drive belt tensioner.
   
6. Remove the drive belt from the accessory drive pulleys.
   

To install:

1. Install the drive belt to the accessory drive pulley.
   
2. Rotate the drive belt tensioner clockwise.
   
3. Install the drive belt to the alternator.
   
4. Ensure the drive belt is properly aligned and seated into the grooves of the accessory drive pulleys.
   
5. Slowly release the drive belt tensioner
   
6. Install the engine splash shield.
   
7. Lower the vehicle.
   

Accessory drive belt routing—1.5L engine


Accessory drive belt routing—2.0L engines


Accessory drive belt routing—2.4L engines


Accessory drive belt routing—2.5L and 2.7L engines


Accessory drive belt routing—3.0L and 3.5L engine

2003 Hyundai Tiburon 2.7L MFI DOHC 6cyl

Inspection
Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately.
Removal & Installation

1. Raise and support the vehicle.
2. Remove the engine splash shield.
3. Rotate the drive belt tensioner clockwise to release the drive belt tension.
4. Remove the drive belt from the alternator.
5. Slowly release the drive belt tensioner.
6. Remove the drive belt from the accessory drive pulleys.

To install:

1. Install the drive belt to the accessory drive pulley.
2. Rotate the drive belt tensioner clockwise.
3. Install the drive belt to the alternator.
4. Ensure the drive belt is properly aligned and seated into the grooves of the accessory drive pulleys.
5. Slowly release the drive belt tensioner
6. Install the engine splash shield.
7. Lower the vehicle.

Fig. Accessory drive belt routing-3.0L and 3.5L engine




Fig. Accessory drive belt routing-2.5L and 2.7L engines




Fig. Accessory drive belt routing-2.4L engines




Fig. Accessory drive belt routing-2.0L engines




Fig. Accessory drive belt routing-1.5L engine




Fig. Accessory drive belt routing-3.0L engine




Fig. Accessory drive belt routing-2.5L engines




Fig. Accessory drive belt routing-2.4L engines




Fig. Accessory drive belt routing-1.8L and 2.0L engines




Fig. Accessory drive belt routing-1.5L engine




Fig. Accessory drive belt routing-2.4L engines




Fig. Accessory drive belt routing-2.0L engines




Fig. Accessory drive belt routing-1.5L engine


I hope help you with this (remember rated this help) Good luck.

2.0L Engines
See Figures 11, 12 and 13
The accessory drive belt for 2.0L engines has no provision for manual belt adjustment, since these engines use an automatic belt tensioner. Drive belt slack is taken up by the automatic tensioner.
Movement of the automatic tensioner assembly during engine operation is not a sign of a malfunctioning tensioner. This movement is the tensioner self-adjusting and is required to maintain constant belt tension.
The belt tensioner has a belt length indicator. If the indicator marks are not between the MIN and MAX marks, the belt must be replaced.
Fig. 11: Drive belt routing-2.0L SOHC engine with A/C Fig. 12: Drive belt routing-2.0L SOHC engine without A/C Fig. 13: Drive belt routing-2.0L DOHC engine