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CLAAS MetaDiag 2007 Update 2016 is a crucial software tool for diagnosing issues in CLAAS agricultural machinery. It enhances efficiency and supports maintenance activities through advanced features and user-friendly design. This update includes improvements in diagnostic capabilities, compatibility, and installation processes. Designed for easy use, it is vital for technicians managing heavy machinery and trucks, ensuring optimal performance and reduced downtime.
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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 677 FMI 2 (MCM) Starter Switch Inconsistent

DESCRIPTION:
This fault code sets when the Motor Control Module (MCM) sees that the starter ignition status from the Common Powertrain Controller (CPC) and MCM do not match.

MONITORED PARAMETER:
Starter Voltage Signal

TYPICAL ENABLING CONDITIONS:
Engine Start

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always Enabled

TYPICAL DURATION:
2 Seconds

DASH LAMPS:
CEL

ENGINE REACTION:
None

VERIFICATION:
Engine Start

PROBABLE CAUSES:
1. If 677-2 inactive, clear the code, start the engine, and if it doesn’t come back release the vehicle.
2. Wiring on the MCM 21-pin connector between pin 20 and ground. Should have 11.5 or more volts.
3. Wiring on the CPC connector #1 between pin 18 and ground. If less than 11.5 Volts, repair wiring.

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