Ignition Coil Resistance

WARNING: This page is about a different car, the 1997 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Check coil case insulation resistance. Remove leads and disconnect connectors. Using an ohmmeter, measure insulation resistance between coil positive terminal and coil case. See Fig 1 If resistance is infinity, go to next step. If resistance is not infinity, replace ignition coil.
Using an ohmmeter, measure secondary resistance between coil towers of each coil. See Fig 2 . Resistance should be as specified. See IGNITION COIL RESISTANCE table. If resistance is not as specified, replace ignition coil.

Fig 1: Checking Coil Case Insulation Resistance

Courtesy of MAZDA MOTOR CORP.

Fig 2: Checking Secondary Coil Winding Resistance

Courtesy of MAZDA MOTOR CORP.

IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Application

Primary

Secondary

Miata

⁽¹⁾

8700-12,900

⁽¹⁾	Information is not available from manufacturer.