Ignition Coil Resistance (Miata, Protege & Protege5)

Using an ohmmeter, measure secondary resistance between coil towers No. 1 and 4 and between coil towers No. 2 and 3. See Fig 2 . Resistance should be as specified. See IGNITION COIL RESISTANCE table. If resistance is not as specified, replace appropriate coil.

IGNITION COIL RESISTANCE ⁽¹⁾

Application

Primary - Ohms

Secondary - Ohms

Miata

⁽²⁾

7,000-11,000

Millenia

2.3L

⁽³⁾

2.5L

.49-.73

⁽⁴⁾ 20,000-31,000

MPV

10.0

5,600

Protege & Protege5

⁽²⁾

7,000-11,000

626

.45-.55

11,500-15,500

⁽¹⁾	Measure resistance at 68°F (20°C).

⁽²⁾	Information is not available from manufacturer.

⁽³⁾	Refer to IGNITION COIL RESISTANCE (MILLENIA 2.3L) .

⁽⁴⁾	Remove distributor cap to measure secondary coil resistance.

Fig 1: Identifying Ignition Coil Primary Terminals (Miata, Protege & Protege5)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying Ignition Coil Secondary Terminals (Miata, Protege & Protege5)

Courtesy of MAZDA MOTORS CORP.