Ignition Coil Resistance
- Remove primary and secondary leads from ignition coil. Using ohmmeter, check primary resistance between positive and negative terminals of coil. See Fig 1
. Resistance should be as specified in IGNITION COIL RESISTANCE
table. If resistance is not as specified, replace ignition coil.
- Check secondary resistance between coil towers of each coil. See Fig 1
. See IGNITION COIL RESISTANCE
table. If resistance is not within specification, replace coil.
- Check insulation resistance of case. Using a 500-volt megger, measure insulation resistance between positive terminal and coil case. If resistance is not more than 10 megohms, replace ignition coil.
Courtesy of MAZDA MOTOR CORP. IGNITION COIL RESISTANCE
| Application |
Primary |
Secondary |
| Miata |
|
8700-12,900 |