P1309 Misfire Monitor AICE Chip Fault
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Joined: Jan 2007
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From: Vernon, NY
Due to the high data processing requirements, the HDR algorithms could not be implemented in the PCM
microprocessor. They are implemented in a separate chip in the PCM called an “AICE” chip. The PCM
microprocessor communicates with the AICE chip using a dedicated serial communication link. The output of the
AICE chip (the cylinder acceleration values) is sent to the PCM microprocessor for additional processing as
described below. Lack of serial communication between the AICE chip and the PCM microprocessor, or an
inability to synchronize the crank or cam sensors inputs sets a P1309 DTC.
microprocessor. They are implemented in a separate chip in the PCM called an “AICE” chip. The PCM
microprocessor communicates with the AICE chip using a dedicated serial communication link. The output of the
AICE chip (the cylinder acceleration values) is sent to the PCM microprocessor for additional processing as
described below. Lack of serial communication between the AICE chip and the PCM microprocessor, or an
inability to synchronize the crank or cam sensors inputs sets a P1309 DTC.