Ignition Coil Resistance

Disconnect 3-pin connector (Legacy 2.5L and Outback 2.5L) or 4-pin connector (except Legacy 2.5L and Outback 2.5L) from ignition coil assembly. On Legacy 2.5L and Outback 2.5L, using an ohmmeter, check primary resistance between terminals No. 1 and 2 for one coil. Check primary resistance between terminals No. 2 and 3 for remaining coil. Resistance should be as specified. See Fig 2 . See IGNITION COIL RESISTANCE - OHMS @ 68°F (20°C) table. If resistance is not as specified for each coil, replace ignition coil assembly.
On all models except Legacy 2.5L and Outback 2.5L, check primary resistance between terminals No. 1 and 2 for one coil. Check primary resistance between terminals No. 2 and 4 for remaining coil. Resistance should be as specified. See Fig 1 . See IGNITION COIL RESISTANCE - OHMS @ 68°F (20°C) table. If resistance is not as specified for each coil, replace ignition coil assembly.
On all models, to test secondary resistance, connect ohmmeter between ignition coil secondary terminals No. 1 and 2, and terminals No. 3 and 4. If resistance of each coil is not as specified, replace ignition coil assembly. See IGNITION COIL RESISTANCE - OHMS @ 68°F (20°C) table.

Fig 1: Identifying DIS Coil Connections (Except Legacy 2.5L)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Identifying DIS Coil Connections (Legacy 2.5L and Outback 2.5L)

Courtesy of SUBARU OF AMERICA, INC.

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

Application

⁽¹⁾ Primary

⁽²⁾ Secondary

Except Legacy 2.5L & Outback 2.5L

.66-.80

10,880-14,720

Legacy 2.5L & Outback 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 (Legacy 2.5L and Outback 2.5L) or terminals No. 2 and No. 4 (except Legacy 2.5L and Outback 2.5L). See Fig 1 and Fig 2 .

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