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.
Ignition Module
The DIS ignition module monitors crankshaft position sensor signals and based on these signals, sends a reference signal to the ECM so that correct spark and fuel injector control can be maintained during all driving conditions.
During cranking the ignition module monitors crankshaft sensor synchronization pulse to begin ignition firing sequence. Below 400 RPM, the ignition coil module controls spark by a predetermined interval based on engine speed alone. Above 400 RPM, the ECM controls the EST and compensates for all driving conditions. The ignition module is incorporated into the coil pack. See Figure
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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.