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.
Circuit Description
The Ignition Control (IC) module and PCM use the low resolution engine speed signal to control ignition operation. The low resolution engine speed signal is derived from the Crankshaft Position (CKP) sensor, which is connected directly to the IC module. The IC module has independent power and ground circuits. The circuits between the IC module and the PCM consist of the low reference circuit, low resolution engine speed signal circuit, IC timing control circuit and IC timing control "B" circuit. Ignition coils are mounted on the IC module. Assembly is mounted on right side of engine block, near oil filter. See Fig 1 .
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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.