Ignition Coil Circuits

2000 Chevrolet Cavalier Base, 2D Coupe, Automatic, 4T40E/MN4SECTION Ignition Coil Circuits

Turn ignition off. Remove ignition module from ignition coil housing. Measure resistance between terminal "A" of ignition module and positive coil voltage terminal at interconnect on coil housing. See Fig 1 . If continuity is present, replace ignition coil housing. If continuity is not present, terminal connections or ignition module are faulty.

Fig 1: Testing Ignition Coil Housing & Ignition Module
G00012634Courtesy of GENERAL MOTORS CORP.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.