Toyota 90919-02234 Ignition Coil Assembly

Primary and secondary resistance checks for ignition coil/igniter units on some Toyota and Lexus models don't apply to newer ones. The only test is to substitute a known good unit, which isn't practical for home mechanics. If all other ignition malfunction causes are ruled out, a faulty ignition coil/igniter unit is likely. To check primary resistance on some models, disconnect the electrical harness connector(s) from each coil and use an ohmmeter across the coil primary terminals. For secondary resistance, detach and label the spark plug wires from each coil and use an ohmmeter across the two secondary terminals. If resistance readings are off, replace the coil. When replacing, disconnect the battery's negative cable and follow specific removal and installation procedures for four-cylinder or V6 models.

The first step is to disconnect the negative cable from the battery. For V6 models, you also need to remove the engine cover and the intake manifold plenum for access to the rear bank coils.

No, they do not provide resistance specifications for these units.

The following checks should be made with the engine cold. If the engine is hot, the resistance will be greater.