Ignition

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1 | The End Wrench | www.endwrench.com
Four-Cylinder
Non-Turbo Engines
Ignition coil testing is a commondiagnostic procedure. Because the
types of coils and their resistance values
vary by model and year, the procedures
and values are listed below. The ignition
coil testing specifications should be
used with the noted figure.
Please refer to the correct service
manual or the Subaru Technical
Information System website at
http://techinfo.subaru.com for the
specific vehicle you are servicing.
Impreza & Outback Sport
1993-1997
1.8L Engine w/Pigtail Connector
& Internal Contacts
> Primary side (Refer to Fig. A)
Between 1 and 2 & between 3 and 4
With Manual Transmission:
0.62 - 0.76 Ω
With Automatic Transmission:
0.63 - 0.77 Ω
> Secondary side (Refer to Fig. A)
Between No. 1 and No. 2 & between
No. 2 and No. 3:
With Manual Transmission:
17.9 - 24.5 k Ω
With Automatic Transmission:
10.4 - 15.6 k Ω
1995-1996
2.2L Engine w/Pigtail Connector
& Internal Contacts
> Primary side (Refer to Fig. A)
Between 1 and 2 & between
3 and 4: 0.69 Ω ±10%
> Secondary side (Refer to Fig. A)
Between No. 1 and No. 2 & between
No. 2 and No. 3: 21.0 k Ω ±15%
1997-1998
2.2L Engine w/Terminal Connector
& External Contacts
> Primary side (Refer to Fig. B)
Between 1 and 2 & between 2
and 3: 0.73 Ω ±10%
> Secondary side (Refer to Fig. C)
Between No. 1 and No. 2 & between
No. 2 and No. 3: 12.8 k Ω ±15%
1998
2.5L Engine w/Pigtail Connector
& Internal Contacts
> Primary side (Refer to Fig. A)
Between 1 and 2 & between 2
and 3: 0.69 Ω ±10%
> Secondary side (Refer to Fig. A)
Between No. 1 and No. 2 & between
No. 2 and No. 3: 21.0 k Ω ±15%
1999-2003
Terminal Connector & External Contacts
> Primary side (Refer to Fig. D)
Between 1 and 2 & between 2 and 4:
0.73 Ω ±10%
> Secondary side (Refer to Fig. E)
Between A and B & between C
and D: 12.8 k Ω ±15%
2004
Terminal Connector & External Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance of
the primary coil cannot be measured.
> Secondary side (Refer to Fig. E)
Between A and B & between C
and D: 12.8 k Ω ±15%
2005
Terminal Connector & External Contacts
(U5 - California)
> Primary side: The igniter is
integrated into the coil. Therefore, the
resistance of the primary coil cannot
be measured.
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
Terminal Connector & Internal
Contacts (US)
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.2 k Ω ±15%
2006
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.7 k Ω ±15%
2007
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
11.2 k Ω ±15%
Legacy & Outback
1995-1996
Pigtail Connector & Internal Contacts
> Primary side (Refer to Fig. A)
Between 1 and 2 & between 3 and 4:
0.69 Ω ±10%
> Secondary side (Refer to Fig. A)
Between No. 1 and No.2 & between
No.2 and No.3: 21.0 k Ω ±15%
Ignition System | Making Sparks
Ignition Coil
Testing
> Figure A: Primary and secondary
testing, pigtail connector with
internal contacts.
> Figure C: Secondary
testing, 3-terminal connector
with external contacts.
> Figure B: Primary testing,
3-terminal connector with
external contacts.
May 2008 | Number 42 | 2
1997-1998
Terminal Connector & External Contacts
> Primary side (Refer to Fig. B)
Between 1 and 2 & between 2 and 3:
0.73 Ω ±10%
> Secondary side (Refer to Fig. C)
Between No. 1 and No. 2 & between
No. 2 and No. 3: 12.8 k Ω ±15%
1999
2.2L Engine w/Terminal Connector &
External Contacts
> Primary side (Refer to Fig. D)
Between 1 and 2 & between 2 and 4:
0.73 Ω ±10%
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
2.5L Engine w/Terminal Connector &
External Contacts
> Primary side (Refer to Fig. B)
Between 1 and 2 & between 2 and 3:
0.73 Ω ±10%
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
2000-2003
Terminal Connector & External Contacts
> Primary side (Refer to Fig. D)
Between 1 and 2 & between 2 and 4:
0.73 Ω ±10%
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
2004
Terminal Connector & External Contacts
Primary side: The igniter is integrated into
the coil. Therefore, the resistance of the
primary coil cannot be measured.
Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
2005
Terminal Connector & External Contacts
(U5 - California)
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
Terminal Connector & Internal
Contacts (US)
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance of
the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.2 k Ω ±15%
2006-2007
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance of
the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.2 k Ω ±15%
Forester
1998
Pigtail Connector & Internal Contacts
> Primary side (Refer to Fig. A)
Between 1 and 2 & between 3 and 4:
0.69 Ω ±10%
> Secondary side (Refer to Fig. A)
Between A and B & between C and D:
21.0 k Ω ±15%
1999-2004
Terminal Connector & External Contacts
> Primary side (Refer to Fig. D)
Between 1 and 2 & between 3 and 4:
0.73 Ω ±10%
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
12.8 k Ω ±15%
2005
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.2 k Ω ±15%
2006
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. F)
Between A and B & between C and D:
11.7 k Ω ±15%
2007
Terminal Connector & Internal Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Image F)
Between A and B & between C and D:
11.2 k Ω ±15%
Baja
2003-2006
Terminal Connector & External Contacts
> Primary side: The igniter is integrated
into the coil. Therefore, the resistance
of the primary coil cannot be measured.
> Secondary side (Refer to Fig. E)
Between A and B & between C and D:
11.2 k Ω ±15%
For correct diagnostic procedures on the
vehicle you are servicing, always refer to
the specific service manual or the Subaru
Technical Information System website at
http://techinfo.subaru.com. <
> Figure D: Primary testing,
4-terminal connector with
external contacts.
> Figure E: Secondary testing,
integrated igniter with external
contacts.
> Figure F: Secondary testing,
integrated igniter with internal
contacts.

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