Preliminary Evaluation · Closed
SmartPlex Multiplexer Module Failure
Manufacturer: Daimler Trucks North America, LLC
This investigation led to a recall
NHTSA links this probe to recall campaign 13V074000.
Read the recall: what is defective and the free fix →What NHTSA is examining
The Office of Defects Investigation (ODI) received Early Warning Reporting (EWR) data from the manufacturer that indicated some number of subject vehicles may allegedly experience a SmartPlex electronic multiplexing switch hub module failure. This failure may result in inadvertent activation of accessory equipment such as external lighting, outriggers, crane, or power takeoff.By letter dated March 1, 2013, Daimler Trucks North America LLC (DTNA) notified ODI that it has initiated a safety recall (NHTSA Recall No. 13V-074 and DTNA Recall No. FL-639) to address a safety defect in approximately 161 model year (MY) 2012 through 2013 Freightliner 108SD, 114SD and Business Class M2 trucks.The affected population was manufactured from December 3, 2011 through October 12, 2012 and originally equipped with a certain SmartPlex electronic multiplexing switch hub module with a suspect serial number. According to DTNA, unpassivated flux residue may be present on the printed circuit board assembly in the switch hub module. Under certain heat and humidity conditions, this flux residue may lead to intermittent short circuits, thereby activating certain outputs in the switch hub module.According to DTNA, they identified the issue with the switch hub module on vehicles undergoing the assembly process.DTNA states they have not received any customer or field reports related to the switch hub module.To date, ODI is unaware of any switch hub module failures on in-service vehicles.DTNA will notify…
Vehicles under investigation
Source: NHTSA Office of Defects Investigation records, updated daily. An investigation is not a determination that a defect exists; many probes close without a recall.