Note: Before you begin, see. Chapter 3. To check the ignition coil you will need an ohmmeter.
Removal
1. The ignition coil is made in the form of a cylindrical plastic box. It is attached with bolts to the inner panel of the left wing, closer to the upper mount of the suspension strut (under the brake booster fluid reservoir, on some models). On 14 NY, 16 SV and 18 SV models, an ignition amplifier unit is mounted on the ignition coil bracket or backing plate (see illustration).
2. Disconnect the negative cable from the battery.
3. Before disconnecting, note the low voltage wiring connections (see illustration).
4. Please note that on models with power steering, one of the ignition coil mounting bolts also secures the brake booster fluid reservoir bracket.
5. Remove the ignition coil.
6. On models with a cylindrical spool, the mounting clamp can be removed from the spool by unscrewing the nut.
Examination
7. To test the ignition coil, first disconnect the low voltage wiring and the high voltage wire. Check the primary windings of the ignition coil by connecting a multimeter across the low voltage wire terminals ("+" or "15" and or "1"). Then check the secondary windings by connecting the multimeter across the terminal ("4") and one of the low voltage wire terminals (usually the "-/1" terminal, although in some cases, it can be either terminal). On 20 XEJ models, the results should be close to the specified values. On all other models, typical ignition coil primary resistance is less than 1 ohm, and secondary resistance is in the range of 4,000-12,000 ohms.
8. If the results obtained differ significantly from those specified, or if there is a short circuit or open circuit in the winding, the ignition coil must be replaced.
Installation
9. Install in reverse order, but check that the connections are correct. They are usually different in appearance so as not to mix them up during installation. If this is not the case, mark or number the connections yourself. If the connections are mixed up, the polarity of the ignition coil will be changed. Although the engine may run, the spark plugs will wear out faster and the engine will have difficulty starting and/or run erratically.
10. Where fitted, ensure the noise suppression capacitor is in place before installing the ignition coil mounting bolts.
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