Coil: Electrical device that creates the sparks that can be seen in spark plugs.
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It is a high-current generator. The engine's computer sends a signal to the coil so that it can boost the energy that will be conducted through some special wires to the spark plugs and, in one of its ends, the spark that will later spark the fuel mixture inside of the cylinders will be generated.
Sell, I've troubleshoot everything electrical on my 2019 Titan in search of the miss it has, replaced cam sensors, new coils, etc. My passengers side VVEL solenoid motor works as tested on the bench, built appears to not be getting power. Could it be the r1 relay or would that relay not shut down both VVELs?