Ignition Coil Resistance (626 2.0L & 2.5L)

Disconnect ignition coil harness connector. Using ohmmeter, on 2.0L, measure primary resistance between ignition coil terminals "A" and "B" and terminals "B" and "C". On 2.5L, measure between terminals "A" and "D", terminals "B" and "D" and terminals "C" and "D". See Fig 6 or Fig 7 . Resistance should be as specified. See IGNITION COIL RESISTANCE table. If resistance is not as specified, replace ignition coil.
Disconnect high tension leads. Using an ohmmeter, on 2.0L, measure secondary resistance between coil towers No. 1 and 4 and towers No. 2 and 3. On 2.5L, measure secondary resistance between coil towers No. 1 and 4, towers No. 2 and 5 and towers No. 3 and 6. See Fig 6 or Fig 7 . Resistance should be as specified. See IGNITION COIL RESISTANCE table. If resistance is not as specified, replace ignition coil.
Measure resistance between terminal "D" and coil case. Resistance should be greater than 10-megohms. If resistance is not as specified, replace coil.

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

Application

Primary

Secondary

Miata

⁽¹⁾

8240-12,360

Millenia

2.3L

⁽²⁾

2.5L

.49-.73

⁽³⁾ 20,000-31,000

MPV

.45-.55

11,500-15,500

Protege

1.6L

⁽¹⁾

7000-12,000

1.8L

⁽¹⁾

8000-14,000

626

2.0L A/T

.40

8700

2.0L M/T & 2.5L

.49-.73

⁽³⁾ 20,000-31,000

⁽¹⁾	Information is not available from manufacturer.

⁽²⁾	Refer to IGNITION COIL RESISTANCE (MILLENIA 2.3L) .

⁽³⁾	Remove distributor cap to measure secondary coil resistance.

Fig 1: Checking Primary Coil Winding Resistance (Miata)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Checking Primary And Secondary Coil Winding Resistance (MPV)

Courtesy of MAZDA MOTORS CORP.

Fig 3: Checking Secondary Coil Winding Resistance (Miata)

Courtesy of MAZDA MOTOR CORP.

Fig 4: Checking Secondary Coil Winding Resistance (Millenia 2.5L)

Courtesy of MAZDA MOTOR CORP.

Fig 5: Checking Secondary Coil Winding Resistance (Protege)

Courtesy of MAZDA MOTORS CORP.

Fig 6: Checking Primary Coil Winding Resistance (626 2.0L)

Courtesy of MAZDA MOTORS CORP.

Fig 7: Checking Primary Coil Winding Resistance (626 2.5L)

Courtesy of MAZDA MOTORS CORP.