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HOMESERVICE MANUALSPLYMOUTH1989COLT DL, 1.5 X, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETHEORY AND OPERATIONTHEORY/OPERATION - MPFICOMPUTERIZED ENGINE CONTROLSCONTROL UNIT
1989 Plymouth Colt DL, 1.5 X, Standard

Control Unit

1989 Plymouth Colt DL, 1.5 X, StandardSECTION Control Unit
NOTE: For ease of understanding, components are grouped into 2 categories. The first category, INPUT DEVICES, is components which control or produce voltage signals that are monitored by the ECU. The second category, OUTPUT DEVICES, are components that are controlled by the ECU (this is usually accomplished by the ECU grounding individual circuits).

The ECU receives and processes signals from data sensors and switches to control fuel delivery. The frequency and duration of injection (fuel delivery time) is controlled by ECU. Fuel delivery time is modified for such operating conditions as cold starting, altitude, acceleration and deceleration.

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.