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HUH? FIFTEEN MIN. IDLE AFTER Keep-Alive RESET?

Discussion in 'Stock 1995 - 2001 Explorers' started by mbruffey, July 2, 2011.

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    1. mbruffey

      mbruffey Active Member

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      Year, Model & Trim Level:
      1997 5.0 AWD Eddie Bauer
      HUH? FIFTEEN MINUTE IDLE AFTER KAM RESET?

      On pagees 1-40 and 1-41, the 1997 Powertrain Control / Emissions Diagnosis OBDII Service Manual refers to a Keep Alive Memory reset. This reset is recommended "whenever an IAC component is replaced or cleaned, or a service affecting idle is performed" (1-40). I thought that I knew what this involved until I read:

      "Once Keep Alive RAM has been reset, the engine must idle 15 minutes (actual time varies between strategies) to learn new idle air trim values. . . . Adaptation occurs in four separate modes" (1-40)

      MODES (1-41):
      Neutral A/C Off
      Neutral A/C On
      Drive A/C Off
      Drive A/C On

      The procedure for clearing Keep Alive RAM appears in section 2A-23, PCM Reset. Essentially, disconnect battery ground for at least 5 minutes, or use your tool to clear KAM. Okay.

      BUT WHAT ABOUT THAT 15 Minute Post-Reset Relearn at IDLE ??? How does that work? When do you cycle the A/C and Neutral/Drive? Or does some other computerized routine do this?

      Thx, Mark
       
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