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.
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HOMESERVICE MANUALSOLDSMOBILE1998AURORA V8-4.0L VIN CREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULEDESCRIPTION AND OPERATION
1998 Oldsmobile Aurora V8-4.0L VIN C
Ignition Control Module: Description and Operation
1998 Oldsmobile Aurora V8-4.0L VIN CSECTION Description and Operation
DESCRIPTION
The Ignition Control (IC) module is located on top of the rear camshaft cover. The IC module performs several functions:
OPERATION
- It monitors the "ON-OFF" pulses produced by the two crankshaft and one camshaft position sensors.
- It creates a 4X and 24X reference signal (4X REF HI and 24X CRANK) sent to the PCM for ignition control.
- It creates a camshaft reference signal (CAM HI) sent to the PCM for fuel injection control.
- It provides a ground reference (REF LO/CAM LO) to the PCM.
- It provides a means for the PCM to control spark advance (BYPASS and IGNITION CONTROL) called IGNITION CONTROL MODE.
- It provides a limited means of controlling spark advance without PCM input, called MODULE MODE.
- The IC module is not repairable. When a module is replaced, the remaining components must be transferred to the new module.
RENDER: 1.0x
NO RELATED
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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.