1982 Lincoln Town Car BaseFACTORY OEM SERVICE PROCEDURE

Basic EEC Trouble Shooting

  1. Perform a visual check of all computer related wiring and connectors. Ensure ignition and fuel system are in proper working order. Start and run engine at 1800 RPM until upper radiator hose is hot.
  2. Connect analog voltmeter positive lead to Lt. Green/Black wire (circuit No. 99) at thermactor air diverter solenoid. Connect voltmeter negative lead to ground. Apply 20" Hg of vacuum to BP/MAP sensor "VENT" port for at least 30 seconds.
  3. As vacuum is released, throttle kicker solenoid will extend to begin self-test. Voltmeter needle will also pulse 2 times (4 times on carbureted engines).
  4. After a few minutes, throttle kicker will retract to indicate end of self-test mode. If any trouble codes are present, the ECA will then transmit code (s) to voltmeter. The 2 digit codes are obtained by counting voltmeter needle pulses.
  5. With battery disconnected, check circuit (wire) continuity with an ohmmeter. If necessary, test resistance of all sensors and solenoids, using values given in COMPONENT RESISTANCE VALUES chart. Be sure to disconnect component from circuit before checking resistance.
    CAUTION: The Exhaust Gas Oxygen (EGO) sensor resistance CANNOT be measured by connecting an ohmmeter directly to its output lead. Sensor damage will result if this is attempted.
    EEC III DIAGNOSTIC CODES CHART

    Code Circuit
    11 EEC III System Okay
    12 RPM
    15 Memory Check
    21 ECT
    22 MAP
    23 TP
    24 ACT
    28 BP
    31 EGR
    32 EGR Closed
    41 Fuel Lean
    42 Fuel Rich
    43 Engine Cold
    44 Thermactor
Factory Service Tools

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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.

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