Question about Jeep Grand Cherokee
Kam (keep alive memory inop) recently rejected for sticker due to kam not operating. battery was not diconnected nor were any codes erased or eec test taken any time recently
I'm not sure what you mean by kam. I never heard of such a thing, but if your computer is losing it's memory (like a battery disconnect) try getting your battery tested. I've seen a few where the battery was weak or had a dead cell and when the motor is cranked the voltage drops low enough that it resets the pcm memory.
Posted on Apr 12, 2009
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Posted on Jan 02, 2017
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Sep 23, 2014 | 1998 Oldsmobile Aurora
Ford Ranger/Explorer/Mountaineer 1991-1999
CONTINUOUS MEMORY CODES
These codes are retained in memory for 40 warm-up cycles. To clear the codes for the purposes of testing or confirming repair, perform the code reading procedure. When the fault codes begin to be displayed, de-activate the test by either disconnecting the jumper wire (meter, MIL or message center) or releasing the test button on the hand scanner. Stopping the test during code transmission will erase the Continuous Memory. Do not disconnect the negative battery cable to clear these codes; the Keep Alive memory will be cleared and a new code, 19, will be stored for loss of PCM power.
KEEP ALIVE MEMORY
The Keep Alive Memory (KAM) contains the adaptive factors used by the processor to compensate for component tolerances and wear. It should not be routinely cleared during diagnosis. If an emissions related part is replaced during repair, the KAM must be cleared. Failure to clear the KAM may cause severe driveability problems since the correction factor for the old component will be applied to the new component.
To clear the Keep Alive Memory, disconnect the negative battery cable for at least 5 minutes. After the memory is cleared and the battery reconnected, the vehicle must be driven at least 10 miles so that the processor may relearn the needed correction factors. The distance to be driven depends on the engine and vehicle, but all drives should include steady-throttle cruise on open roads. Certain driveability problems may be noted during the drive because the adaptive factors are not yet functioning
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