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.
1994 Toyota Corolla Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Ignition Coil Resistance
- Disconnect wiring from ignition coil so ignition coil is isolated from system. Using ohmmeter, check primary resistance between ignition coil positive (+) and negative (-) terminals. See Fig 1.
- Check secondary resistance between ignition coil positive (+) terminal and high tension terminal (coil wire tower). See Fig 2. Replace ignition coil if resistance is not within specification. See appropriate IGNITION COIL RESISTANCE table.
IGNITION COIL RESISTANCE
| Application | Primary | Secondary |
|---|---|---|
| Corolla | 1.11-1.75 | 9000-15,700 |
Factory Service Tools
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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.
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