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.
2003 Subaru Outback F4-2.5L SOHCFACTORY OEM SERVICE PROCEDURE
Ignition Control Module: Testing and Inspection
INSPECTION
Using accurate tester, inspect the following items, and replace if defective.
1. Primary resistance
2. Secondary coil resistance
CAUTION: If the resistance is extremely low, this indicates the presence of a short-circuit.
Specified resistance:
[Primary side]
Between terminal No. 1 and No. 2 0.73 Ohm ± 10%
Between terminal No. 2 and No. 4 0.73 Ohm ± 10%
[Secondary side]
Between (A) and (B) 12.8 kOhm ± 15%
Between (C) and (D) 12.8 kOhm ± 15%
3. Insulation between primary terminal and case:
10 MOhm or more.
Using accurate tester, inspect the following items, and replace if defective.
1. Primary resistance
2. Secondary coil resistance
CAUTION: If the resistance is extremely low, this indicates the presence of a short-circuit.
Specified resistance:
[Primary side]
Between terminal No. 1 and No. 2 0.73 Ohm ± 10%
Between terminal No. 2 and No. 4 0.73 Ohm ± 10%
[Secondary side]
Between (A) and (B) 12.8 kOhm ± 15%
Between (C) and (D) 12.8 kOhm ± 15%
3. Insulation between primary terminal and case:
10 MOhm or more.
Factory Service Tools
Use the Manual With the Right Hardware
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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.