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 MANUALSSUBARU2002LEGACY GT WAGON AWD F4-2.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULETESTING AND INSPECTION
2002 Subaru Legacy GT Wagon AWD F4-2.5L SOHC
Ignition Control Module: Testing and Inspection
2002 Subaru Legacy GT Wagon AWD F4-2.5L SOHCSECTION 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.
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.