1. Have you been issued a lawyer's notice by him? If yes, then reply to the notice through your lawyer and offer to pay the amount which you are liable to pay.
2. If he files a criminal case for cheque bounce against you in the court you should take bail. The court will afford you an opportunity to enter defence to rebut his case. You will not be thrown in jail at the throw of a hat.
3. At this stage wait for the legal notice to be issued. Once it is issued have it replied by your lawyer and then follow it up by remittance of the amount of loan.