Toyota Sequoia Ignition Coil Schematic Diagram According to, an ignition coil is an induction coil in an automobile’s ignition system which transforms the battery’s 12 volts to the thousands of volts (20 to 30 thousand volts or more) needed to spark the spark plugs. The following schematic shows the 2001 Components Diagram which consists of:

1) Ignition coil
2) Camshaft sensor
3) ECM 2wd
4) Side bracket #1
5) Side bracket #2
6) ECM Rear bracket

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