Ignition Coil Resistance

Remove primary and secondary leads from ignition coil. Using ohmmeter, check primary resistance between terminals "A" and "B" of coil. See Fig 1 . Resistance should be as specified in the IGNITION COIL RESISTANCE table. If resistance is not as specified, replace ignition coil.
Check secondary resistance between terminal "A" and coil tower. See Fig 2 . See the IGNITION COIL RESISTANCE table. If resistance is not within specification, replace coil.

Fig 1: Checking Primary Coil Winding 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

Millenia 2.5L ⁽¹⁾

.49-.73

20,000-31,000

⁽¹⁾	Remove distributor cap to measure secondary coil resistance.