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 MANUALSCHEVROLET1998ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION CONTROL MODULEDESCRIPTION AND OPERATIONIGNITION COIL DRIVER MODULE AND IGNITION COIL
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Ignition Coil Driver Module and Ignition Coil
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Ignition Coil Driver Module and Ignition Coil
Ignition Coil Driver Module:
The Ignition Coil Driver Module (3, 4 - ICM Bolt) is mounted on a bracket (5, 6, 1-Bracket Attachment Rivet) next to the coil. The VCM signals the ICD to turn ON primary current to the ignition coil (2) by pulling the IC line high (4 volts). The ICD turns the primary current ON and OFF by applying and removing the ground to the primary winding at the appropriate time. This module is of minimum function. The module does not contain backup calibrations that allows the engine to continue to run if the IC signal is lost.
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.