Note: Toyota and Lexus vehicle manufacturers do not publish resistance values for the primary and secondary circuits of the ignition coils/control units used on these models.
1. Disconnect the ground cable from the battery (see paragraphs 1 and 3).
2. Remove the engine cover (see paragraph "Intake manifold - removal and installation" in chapter 2).
Models with four-cylinder engine
3. Disconnect the electrical connector on the ignition coil, then remove the coil mounting bolt (Fig. 7.3).
Fig. 7.3. To disconnect the ignition coil from the cylinder head cover on a four-cylinder engine, disconnect the electrical connector (A), and then remove the coil mounting bolt (P)
4. Pull the coil straight up and then out of the cylinder head cover (Fig. 7.4).
Fig. 7.4. To remove the ignition coil on a four-cylinder engine, pull it straight up and out. Before installing the coil, make sure the boot (A) is in good condition and positioned properly
5. Installation is performed in the reverse order of removal.
Models with VG engine
6. If you are going to remove/replace the ignition coil on the rear cylinder head, remove the upper intake manifold (see paragraph "Intake manifold - removal and installation" in chapter 2).
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7. Disconnect the electrical connector on the ignition coil, and then unscrew the coil mounting bolt (Fig. 7.7).
Fig. 7.7. To disconnect the ignition coil from the cylinder head cover on a VG engine, press the locking tab (A) and disconnect the electrical connector, then remove the coil mounting bolt
8. Pull the coil straight up and then out of the cylinder head cover (Fig. 7.4).
9. Installation is performed in the reverse order of removal.