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.
Ignitor (GS300 & IS300)
Ignitor has a Black 10-pin connector and is located in engine compartment, on top of left strut tower. Primary circuit is turned off when Engine Control Module (ECM) delivers a signal to ignitor on IGT wire, causing ignition coil to fire spark plug. After delivering a command to turn off primary circuit on IGT wire, ECM monitors ignition confirmation signal on IGF circuit to ensure primary switching has occurred. If IGF signal is not input to ECM, ECM will stop fuel injection as a fail safe function.
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.