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 MANUALSCHEVROLET1995S10/T10 P/U 2WD L4-2.2L VIN 4REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION CONTROL MODULEDESCRIPTION AND OPERATION
1995 Chevrolet S10/T10 P/U 2WD L4-2.2L VIN 4
Ignition Control Module: Description and Operation
1995 Chevrolet S10/T10 P/U 2WD L4-2.2L VIN 4SECTION Description and Operation
Ignition Coil Assembly And CKP Sensor:
Sensor To Crankshaft Reluctor Relationship:
Firing Order:
The Ignition Control Module (ICM) monitors the Crankshaft Position (CKP) sensor signals and based on these signals sends a reference signal to the Powertrain Control Module (PCM) so that correct spark and fuel injector control can be maintained during all driving conditions. During cranking, the 1CM monitors the "sync-pulse" to begin the ignition firing sequence and below 4O0 RPM the module controls spark advance by triggering each of the two ignition coils at a pre-determined interval based on engine speed only. Above 400 RPM the PCM controls the Ignition Control (IC) circuit and compensates for all driving conditions. The ICM must receive a "sync-pulse" and then a crank signal in that order to enable the engine to start.
NOTE: The ICM is not repairable. when an ICM 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.