Keep Alive Ram Reset Procedure

1999 Mazda 626 ES, 2.5 D, StandardSECTION Keep Alive Ram Reset Procedure
WARNING: This page is about a different car, the 2002 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When battery is disconnected, vehicle computer may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

PCM adaptive memory Keep Alive Random Access Memory (RAM) restores default settings for idle, fuel trim and other PCM controlled systems. When Keep Alive RAM is reset, vehicle may exhibit some undesirable driveability characteristics until PCM relearns necessary values for optimum driveability. Manufacturer recommends using scan tool to restore default setting for Keep Alive RAM. Follow scan tool equipment manufacturers instructions to perform this function. If scan tool does not support this function, disconnect negative battery cable for a minimum of 5 minutes as an alternative Keep Alive RAM resetting procedure.

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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.