Toyota Celica, Corolla, ECHO & MR2 1999-05
Diagnosis & Testing
Cold and hot means the temperature of the coils themselves. Cold is up to 122 degrees F, and hot is 122 degrees F and above.
To check that a spark occurs, first remove the ignition coils.
Using a 16mm spark plug wrench, remove the spark plugs.
Install each spark plug into an ignition coil (with igniter) and connect the ignition coil connectors.
Then disconnect the four injector connectors and ground the spark plugs.
Check that sparks occur at each spark plug while the engine is being cranked.
Make sure to ground the plugs during testing.
Do not crank the engine for more than two seconds.