2003 Ford Windstar BaseFACTORY OEM SERVICE PROCEDURE

Keep Alive Random Access Memory Reset Procedure

CAUTION: When battery is disconnected, vehicle computer may lose memory data. Driveability concerns may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting the battery.
  1. Resetting Keep Alive Random Access Memory (RAM) will return PCM memory to its default setting. Adaptive learning contents such as idle and fuel trim are included. PCM reset procedure is part of keep alive RAM reset. See PCM RESET PROCEDURE . If an error message is received or scan tool is unable to perform keep alive RAM reset procedure, disconnect negative battery terminal for a minimum for 5 minutes, then go to next step. If using Worldwide Diagnostic System (WDS) or New Generation Star (NGS) scan tool, turn ignition switch to ON position. Select ACTIVE COMMAND MODES, then select RESET KEEP ALIVE MEMORY. Go to next step.
  2. After keep alive RAM has been reset, engine must idle for 15 minutes to learn new idle air trim values. Idle quality will improve as strategy adapts. Adaptation occurs in 4 separate modes. See IDLE AIR TRIM LEARNING MODES  table.
    IDLE AIR TRIM LEARNING MODES

    Transmission Gear Selector Position A/C Mode
    Neutral On
    Neutral Off
    Drive On
    Drive Off
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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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