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 MANUALSMERCURY1997TRACER L4-122 2.0L SOHCREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATION
1997 Mercury Tracer L4-122 2.0L SOHC
Engine Control Module: Description and Operation
1997 Mercury Tracer L4-122 2.0L SOHCSECTION Description and Operation
OPERATION
The Powertrain Control Module (PCM) uses data it receives from various sensors, switches and relays to generate output signals to control various relays, solenoids and other components. The PCM will compensate for the age of the various sensors and for changes in altitude.
RENDER: 1.0x
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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.