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Home >> Pontiac >> 2009 >> G3 Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Controls And Fuel - 1.6L (LDE, LLU, And LXV) Or 1.8L (2H0) - Troubleshooting And Diagnosis) >> Electronic Ignition System Diagnosis >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

Ignition voltage is supplied to the ignition coil assembly. The engine control module (ECM) provides a ground for the ignition control (IC) circuits. When the ECM removes the ground path of the ignition primary coil, the magnetic field produced by the coil collapses. The collapsing magnetic field produces a voltage in the secondary coil which ignites the spark plugs. The sequencing and timing are controlled by the ECM.

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