Resetting Keep Alive Random Access Memory (RAM)

Resetting keep alive RAM will return PCM memory to its default setting. Adaptive learning contents such as idle and fuel trim are included.

After keep alive RAM has been reset, the vehicle may exhibit certain driveability concerns. It will be necessary to drive the vehicle to allow the PCM to relearn values for optimum driveability and performance.

A keep alive RAM reset is done as follows:

• During KOEO with the WDS or equivalent tester, use the reset keep alive memory function. This is found in the Active Command Modes menu on the WDS or equivalent tester.
• If a generic scan tool is used, this function may not be supported. See scan tool manufacturer's instruction manual.
• If an error message is received or the scan tool does not support this function, disconnecting the negative battery cable for a minimum of 5 minutes may be used as an alternative procedure.