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.
Dis (3.5L)
The 3.5L V6 is equipped with a distributorless ignition system. In this system, an individual ignition coil is used for each cylinder. An ignition coil assembly consisting of 3 coils and one ignition control module is located in the center of each cam cover. This allows ignition coil to connect directly to spark plug and eliminates the need for secondary ignition wires.
The 2 ignition control modules control the ignition coils on each cylinder bank separately. The PCM controls the ignition control modules using 6 separate Ignition Control (IC) circuits. Firing sequence and timing are PCM controlled.
Because there are no secondary ignition wires, there is no energy loss due to ignition wire resistance. Also, since the firing is sequential, each ignition coil has 5 events to saturate as opposed to 2 in a "waste spark" system. Therefore, no energy is lost through the resistance a "waste spark" system would normally create.
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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.