F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Idle/Throttle Speed Control Unit: Description and Operation
Stationary Elevated Engine Idle Speed Control System (Seic)
Models Affected 2008 Model Year F-250/350/450/550 and E-250/350/450.
Purpose
To explain changes and tunctions ot the stationary elevated engine idle speed control system (SEIC) tor power take-off (PtO) and battery charge protect
applications, initially introduced by SVE Bulletin Q108 R1 for 2005 Model Year.
Overview
SEIC
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A powertrain control module (PCM) strategy that provides elevated engine speed to drive auxiliary commercial equipment such as hydraulic
pumps, generators, air compressors; or maintain vehicle battery charge under extreme electrical demands.
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SEIC is standard in all PCM's tor Super Duty F-Series light truck and E-Series, over-8500 lb. GVWR, with gas or diesel engines and TorqshiftTM
automatic or M6 manual transmissions. Is optional tor 4R75E transmissions.
Customer Access Wires for SEIC and VSO/CTO/PARK Signals
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F-Series: Located in cabin, tagged and bundled above parking brake pedal assembly behind data link connector. Pass-thru wires are in the same
bundle.
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E-Series: In the engine compartment, tagged and bundled with large harness running below windshield/cowl. Remove some ot the plastic harness
tape where the harness exits its plastic support gutter above the engine air induction tube to reveal the blunt-cut wires.
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The final stage manutacturer or up-fifter is required to supply the customer intertace equipment.
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Additional intormation in the Circuit Descriptions section.
Transmission PTO Gear and Port
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Available only on Super Duty F-Series.
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Standard with M6 manual transmission (some PlO installations are prevented by exhaust system interterence).
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Available tor Torqshift 5-speed automatic transmission by ordering "Transmission Power Take-Off Provision". The PTO gear is direct-splined to
the torque converter output shatt and thus receives any torque the torque converter is delivering, whether the vehicle is stationary or mobile (i.e. no
internal PTO clutch).
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NEVER use any sealer, especially silicone-based, on the PTO port gasket.
Torque and Horsepower
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Torqshift Automatic Transmission: The PTO gear delivers up to 250 tt-lbs torque to the attermarket PTO, and can manage the heat ot 40 hp
continuously. Higher horsepower can be delivered, but tor shorter durations depending on the amount ot power required.
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M6 Manual Transmission: The PTO gear delivers up to 250 ft-lbs torque, but has less-capable cooling tor PTO usage than TorqShift.
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Typically, the attermarket PTO cannot use all this available torque and horsepower, so contact the individual attermarket PTO supplier.
