There are ways to tell if it's not working, and that is if you drive on a rainy or damp day, it may stop working. A good way to test the coil is in a dark room or at night, spray water on the coil. If it sparks, it needs replacing.
It's either mounted on top of the coil bracket, or on the wall to the left of the coil.
bad ignitor or coil .
not sure what year you have but on 1986-1991 it is on the ignition coil closest to the battery
I'd also check the coil.
bad ignition coil, bad ignitor
It sounds like the Camry has lost power to the coil. Check the wiring from the coil to the power, and check the coils ground circuit. Either of these can cause the problem.
Check the Ignitor
How do you change a coil pack on a 1997 cavalier
You probably need either the ignitor or an ignition module. Both are available in the aftermarket industry.
Icon of Coil was created in 1997.
The Barbed Coil was created in 1997.
I have read it is a problem with the ignition coil.Even if the coil seems O.K.