Contents: Examination ↳ Removal and installation ↳
Warning: See paragraph 2.
Examination
1. Check if battery voltage is supplied to the center contact of the ignition coil electrical connector (see paragraph 2). Disconnect the negative battery cable (chapter 5A).
2. Disconnect the coil electrical connector if it has not been disconnected previously.
3. Use an ohmmeter to measure the resistance on the primary windings of the coil, connecting the ohmmeter to the coil contacts as follows. First connect it to one of the outer contacts and the central contact, and then to the other outer contact and the central contact. Compare the readings obtained with the specified resistance of the primary circuit (see Technical requirements).
4. Disconnect the spark plug wires. Note how they are connected or mark them as indicated in chapter 1. Use an ohmmeter to check the resistance to make sure there is no open circuit in the circuit, the pi resistance of the secondary winding of the coil corresponds to the specified one. To do this, connect the ohmmeter to each pair of terminals of the high-voltage wires. On models with 4-cylinder engines, terminals 1 and 4, as well as terminals 2 and 3, are connected to the secondary winding. On models with V-shaped 6-cylinder engines, terminals 1 and 5, 3 and 4, 2 and 6 are connected to the secondary winding. Then switch the ohmmeter to the maximum resistance measurement mode. Make sure there is no short circuit between the pairs of terminals. That is, the resistance between terminals 1 and 2 or 4 and 3, as well as between any terminal and ground should be infinite.
5. If any of the ohmmeter readings do not match the description in step 4, replace the coil. The following inspection procedures should be performed by dealers.
Removal and installation
Models with 4-cylinder engines
Note: On 4-cylinder models, the ignition coil is mounted on a bracket located behind the cylinder head.
6. Disconnect the negative battery cable (chapter 5A).
7. Remove the air flow meter and resonator (Chapter 4).
8. Disconnect the electrical connectors on each side of the coil. Then disconnect the high-voltage wires, noting their location or marking them (see chapter 1) (see Fig. 3.8).
9. On pre-1998 models, remove the two screws securing the EGR pipe to the coil bracket. Then remove the coil mounting screws. Remove the coil assembly from the cylinder head (See Fig. 3.9).
10. If necessary, the radio interference suppression device can be removed from the support bracket by unscrewing its bolts. Note that the coil is supplied together with the bracket as a single unit.
11. Installation - in the reverse order of removal. Make sure that the spark plug wires are connected correctly and tighten the coil screws securely.
Models with V-shaped 6-cylinder engines
Note: On V6 models, the ignition coil is located on the rear cylinder head cover.
12. Disconnect the negative battery cable (chapter 5A).
13. Disconnect the wiring from the ignition coil and the radio interference suppressor. Release the wiring of these components from the connections (see Fig. 3.13, a, b). If necessary, remove the EGR valve solenoid from the upper section of the intake manifold.
14. Disconnect the high-voltage wires from the ignition coil, remembering their position. Squeezing the tabs of the stoppers, carefully remove the wires from the ignition coil. The wires are marked according to the cylinder numbers (see Fig. 3.14, a, b).
15. Unscrew the screws and remove the coil, taking into account that one of the bolts secures the ground wire, and the other two bolts secure the radio interference suppression device (see Fig. 3.15, a-c).
16. Installation - in the reverse order of removal. Make sure that the spark plug high-voltage wires are connected correctly and that the ground wire is secured with one of the bolts.