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.
Circuit Description
Direct Ignition System (DIS) ignites one cylinder with one ignition coil. Ignitor is integral to ignition coil. Direct ignition system may also be referred to as distributorless ignition system. ECM determines ignition timing and outputs an ignition signal (IGT signal) for each cylinder. Based on IGT signals, power transistors in ignitor cut off current to primary coil in ignition coil, causing ignition coil to fire the spark plug. At the same time, the ignitor delivers an ignition confirmation signal (IGF signal) to ECM to verify ignition coil has fired. DTC P1300 is for ignitor on ignition coil No. 1 and is set when there is no IGF1 signal to ECM when engine is running. If DTC P1300 exists, ECM will operate in fail-safe mode. Possible causes are:
- Ignition system malfunction.
- IGF1 or IGT1 circuit from ignition coil to ECM is open or shorted.
- Defective ignition coil with ignitor.
- Defective ECM.
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.