Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU1998FORESTER L, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGIGNITION CHECKSIGNITION COIL RESISTANCE

1998 Subaru Forester L, Standard

Ignition Coil Resistance

1998 Subaru Forester L, StandardSECTION Ignition Coil Resistance

Disconnect 3-wire connector from ignition coil assembly. Using an ohmmeter, check primary resistance between terminals No. 1 and 2 for one coil. See Fig 1.
Check primary resistance between terminals No. 2 and 3 for remaining coil. Resistance should be as specified. See IGNITION COIL RESISTANCE table. If resistance is not as specified for each coil, replace ignition coil assembly.
To test secondary resistance, connect ohmmeter between ignition coil secondary terminals No. 1 and 2, and terminals No. 3 and 4.
Repeat test for other coils. If resistance of each coil is not as specified, replace ignition coil assembly.

Fig 1: Identifying Ignition Coil Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

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

Application

⁽¹⁾ Primary

⁽²⁾ Secondary

Forester & Impreza

.62-.76

17,850-24,150

Legacy

2.2L

.66-.80

10,880-14,720

2.5L

.40-1.00

18,000-24,000

⁽¹⁾	Checked between ignition coil primary terminals No. 1 and No. 2, and terminals No. 2 and No. 3. See Fig 1.

⁽²⁾	Check between ignition coil secondary terminals No. 1 and No. 2, and terminals No. 3 and No. 4. See Fig 1.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.