Checking the belt is not something you need to do or something that will help in any way. The belt can look great and be ready to break. That is why these belts are replaced at a certain enterval. On your 1999 Honda Civic the belt MUST be replaced every 105,000 miles or 10 years whichever comes fist. This is an interference engine and if the belt breaks you will have serious damage to the engine.

If the engine is still running fine then checking the t-belt is an easy task. I sensed your question meant the other way..

Remove the valve cover and turn the engine over by hand, look for cracks and oil or coolant soaking.

Replace the belt if oil or coolant soaked or cracks are present.

Find the source that cause the oil or coolant get on the T-Belt and repair it. Things like camshaft seals

or valve cover gasket etc..

The following link will help:

http://troubleshootmyvehicle.com/honda/1...

Any more question?: Liverhuyen2003@Yahoo.com

Remove the inspection cover and take a peek. It won't do you any good, but at least you'll know what it looks like.

how to check timing belt

google it !!! there are sites like youtube or ehow that will help