1999 Toyota Camry Owners Manual - Page 206

'99camry U Keys (with engine immobiliser system) To protect things locked in the trunk when you have your vehicle parked, leave the sub key with the attendant. Since the door can be locked without a key, you should always carry a spare master key in case you accidentally lock your keys inside the vehicle. Your vehicle is supplied with the two kinds of key. 1. Master key (black)-This key works in every lock. Your Toyota dealer will need it to make you a new key with built −in transponder chip. 2. Sub key (gray)-This key will not work in the glove box and trunk. The master key and sub key each have a transponder chip in their key head which is very important for the system function, so be careful not to lose these keys. If you make your own duplicate key, you will not be able to cancel the system or start the engine. NOTICE When using a key containing a transponder chip, observe the following precautions: z When starting the engine, do not use the key with a key ring resting on the key grip and do not press the key ring against the key grip. Otherwise the engine may not start, or may stop soon after it starts. 8