Detroit DD16 GHG14 (2014-16) Fault Code: SPN 1231 FMI 9 (MCM) Aftertreatment Control Module Message Not Received or Has Stopped Arriving
DESCRIPTION:
This fault code sets when the motor control module (MCM) stops receiving messages from the aftertreatment control module (ACM).
MONITORED PARAMETER:
ACM controller area network (CAN) communication.
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always enabled
TYPICAL DURATION:
Two seconds
DASH LAMPS:
1. MIL is solid
2. CEL and AWL Flash
ENGINE REACTION:
30 seconds shutdown.
VERIFICATION:
1. Turn the ignition off.
2. Disconnector the USB link from the 9 – pin connector.
3. Wait five minutes.
4. Reconnect the USB link and diagnostic service tool.
5. Turn the ignition on and recheck for the fault code.
NOTE: If there are any battery voltacodes, fix those first. If the ECM has been programmed recently, clear codes, test drive, and release vehicle if they don’t come back.
PROBABLE CAUSES:
1. Powertrain Controller Area Network (PTCAN) harness.
2. ACM (computer) failure.
3. CPC (computer) failure.
4. Wiring between the CPC and the ACM.
5. ACM/CPC not getting voltage.
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