Ignition Coil
Inspection
PROCEDURE
1. Disconnect the battery ground cable.
2. Remove the plastic coil cover.
3. Remove the two bolts securing the coil connector and connect the ohmmeter probes.

4. Using the ohmmeter, measure the resistance between the positive and negative coil terminals (indicated by arrows). Compare the result with the specified value.

5. Measure the resistance of the secondary winding, i.e. between the positive coil terminal and the high-tension terminal (indicated by arrows). Compare the result with the specified value.
6. If both resistance values differ from the specification, replace the ignition coil.
Replacement
PROCEDURE
1. Disconnect the battery ground cable.
2. Remove the heat shield from the coil.
3. Disconnect the leads from the coil, marking them beforehand. Remove the coil mounting screws.
4. Remove the coil mounting screws.
6. Install the coil in the reverse order of removal.
Test yourself
A quick Toyota Corolla quiz: every answer comes with an explanation and a link to the manual page.