Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello. Welcome to Just Answer. Please allow me to assist you. If you are blowing the AM2 fuse, you have a bad coil somewhere. it may NOT be #3. All of the coils share the same ground circuit. You could have a bad number 2 coil that is allowing voltage to spike into the #3 coil and kill the spark. Inside of each coil there si a diode that prevents voltage and the ground circuit from interacting. It is common on older coils to have this happen, and, it is very common on non-factory coils to have this also. The recommendation I have for you on this request would be to swap coils around (not too hard to do). Start by putting the #2 coil into the #1 cylinder tube. Clear your codes and retest. If the AM2 fuse blows, disconnect all of the coils and plug them back in and crank one at a time. When the AM2 fuse blows again, throw that coil away. Replacement coils should be genuine Toyota coils.
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