for power take-off applications, including
related customer access signal circuits and pass-thru circuits.

Overview

SEIC strategy
¾ 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.
¾ Standard in all PCMs for Super Duty F-Series light truck, and E-Series, over-8500 lb. GVWR, all
powertrains.
¾ Replaces the Auxiliary Powertrain Control Module (APCM) used with 2004 model year and prior diesel
engines.

Blunt-cut wires to access SEIC, and customer access for VSO, CTO, PARK, PARK-NEUTRAL signals.
¾ F-Series: Located in the cabin, tagged and bundled above the parking brake pedal assembly.
Pass-thru wires are in the same bundle.
¾ E-Series: In the engine compartment, tagged and bundled with the large harness running below the
windshield/cowl. Remove some of the plastic harness tape where the harness exits its plastic support
gutter above the engine air induction tube to reveal the blunt-cut wires.
¾ The final stage manufacturer or up-fitter is required to supply the customer interface or controller.
¾ Further detailed in the "Circuit Descriptions" section.

Blunt-cut wires to access the four optional Up-fitter Switches.
¾ Available as an option on Super Duty F-Series only, Option Code 66S.
¾ May be used as a PTO activation switch.
¾ Located in the cabin, above the parking brake pedal assembly. Remove the PDJB for easy access.
¾ Further detailed in the "Circuit Descriptions" section.

Transmission PTO gear and port.
¾ Available for Super Duty F-Series only.
¾ Standard with M6OD 6-speed manual transmission.
¾ Available for TorqShift 5-speed automatic transmission by ordering Transmission Power Take-Off
Provision, Option Code 62R.

Q-108
Date
: August 19, 2004
Revised: September 20, 2004
SVE BULLETIN
SPECIAL VEHICLE ENGINEERING BODY BUILDERS ADVISORY SERVICE
Toll-free: (877) 840-4338
E-Mail:
bbasqa@ford.com
(preferred)
Fax: (313) 594-2633
Website:
www.fleet.ford.com/truckbbas
Originator: Mike Duvall/hduvall
Page 2 of 12
Date Issued: 7/29/04
Q108.doc


Date Revised: 9/20/2004


Vocabulary / Definitions

PTO Applications: Includes all forms of mechanical power, using the vehicle powertrain as the source, including
transmission side-mounted PTO, split-shaft PTO, crankshaft PTO, and FEAD-mounted clutch-pumps, air
compressors, and generators.
Clutch-Pump: A type of PTO that is driven by the vehicle engine crankshaft through the FEAD pulley system.
PCM: Powertrain Control Module
FEAD: Front End Accessory Drive (belt and pulley drive system)
SEIC: Stationary Elevated Idle Control. This is powertrain control strategy in the PCM. Blunt-cut wires are
provided for customer access.
VSO: Vehicle Speed Out. 8000 pulses per mile signal. Blunt-cut wire provided for customer access.
TPO: Throttle Position Out. Direct customer access not provided.
ECT: Engine Coolant Temperature
CTO: Clean Tach Out. An engine speed signal. A Blunt-cut wire is provided for customer access.
VPWR: Battery voltage signal only, not intended to carry high current load.
BCPIL / BCPSW: Battery Charge Protection Illumination (Lamp) / Switch.
Intermittent Duty Usage: Ten (10) minutes or less of continuous operation.
Continuous Duty Usage: Greater than 10 minutes of continuous operation.
Change-of-State: Part of the Gas engine SEIC strategy only. If any condition is met that disables SEIC, the
operator is required to turn off the PTO switch and back on again before SEIC will allow elevated idle to return.
TRO_PN, TRO_P: Transmission Range Output, indicating either combination PARK or NEUTRAL, or PARK-ONLY
PDJB: Power Distribution Junction Box. Located at lower driver-side instrument panel.


Product Descriptions

SEIC (Stationary Elevated Idle Control): New for 2005 model year, this feature is included in the powertrain
control strategy of all F250/350/450/550 and E250/350/450, over-8500 lb GVWR, all powertrains. For diesel
engines it replaces the APCM (Auxiliary Powertrain Control Module) previously included with Ford "Auxiliary Idle
Control Kit" Option Codes 96P (F-Series) and 961 (E-Series). For a stationary vehicle it allows the operator to
elevate engine idle speed to operate a transmission-mounted PTO, or engine FEAD-mounted clutch-pump, air
compressor, or generator; or be used to help keep the vehicle battery charged. SEIC uses CAN messaging
internally. It is activated by applying discrete voltage signals to a wire bundle located in the F-Series cabin above
the parking brake release handle, and in the E-Series engine compartment. The up-fitter will need to complete the
circuits as described herein, and provide the customer interface (i.e. buttons, LCD read-out for engine speed, PTO
switch, etc.). Note: The F-Super Duty light truck offers four optional relayed rocker switches on the instrument
panel for the up-fitter to use (Option Code 66S). Ramp-up rate is fixed and approximately 200 rpm/sec for diesel
engine and 400 rpm/sec for gas engine.

PTO Control (For automatic transmission-mounted PTO only): This is PCM strategy within the SEIC feature
that automatically looks for and recognizes whether the vehicle has a TorqShift automatic transmission with a side-
mount PTO ("Transmission PTO Provision", Option Code 62R), and makes the internal PTO gear function by
commanding the torque converter to lock at 1200 rpm minimum speed. The PTO gear is splined directly to the
transmission torque converter turbine shaft. When all of the vehicle safety enablers are met, and the engine speed
is commanded by the operator to at least 1200 rpm, then the strategy automatically commands the torque converter
to lock at 1200 rpm to deliver engine torque to the PTO gear (actual lock-up begins at approximately 1050 rpm), and
elevates the transmission hydraulic line pressure to 150 psi nominal for the aftermarket PTO to use to hold its
engagement clutch. NOTE: Applying battery voltage to the Diesel "PTO" or Gas "PTO-Mode" wires is required to
initiate these commands. Failing to do so may show up as low or oscillating hydraulic line pressure and low or no
aftermarket PTO torque or pump flow output. Any attempt to operate the aftermarket PTO at elevated idle without
these commands may result in under-capacity PTO clutch wear, resulting in rapid contamination of transmission
fluid and internal transmission damage. This applies to both stationary and mobile automatic transmission PTO
operations.

Originator: Mike Duvall/hduvall
Page 3 of 12
Date Issued: 7/29/04
Q108.doc


Date Revised: 9/20/2004


Wire Locations
SEIC circuits, Customer Access Signal Circuits, Pass-Thru Wires.


F250/350/450/550
Cabin / Instrument Panel

Blunt-cut access wires for SEIC, "Customer
Access" signal circuits for CTO, VSO, PARK,
PARK-NEUTRAL
, and 4 pass-thru wires, are
bundled together at the harness above the
parking brake pedal assembly.

Blunt-cut access wires for the 4 optional
"Upfitter Switches" are at the harness behind the
Power Distribution Junction Box
. Pull the PDJB
away from the instrument panel for better
access as shown.




F250/350/450/550
Engine Compartment


The 4 blunt-cut
pass-thru wires are found in
the harness below the cowl, just outboard of
the brake master cylinder, as shown.





E250/350/450
Engine Compartment

Blunt-cut access wires for SEIC, and the
"Customer Access" signal circuits for CTO, VSO,
PARK, PARK-NEUTRAL,
are with the large
harness running below the windshield/cowl.
Remove some of the plastic harness tape
where the harness exits its plastic support
gutter above the engine air induction tube to
reveal the blunt-cut wires.


The two pass-thru wires are part of the same
modified vehicle wiring kit as prior years.
Located at the 4-pin connector in the harness
below the cowl, outboard of the brake master
cylinder, as shown. Mating pigtail connector,
4C24-14A411-A, found in dunnage. Opposite ends
located above driver-side kick-panel.
Originator: Mike Duvall/hduvall
Page 4 of 12
Date Issued: 7/29/04
Q108.doc


Date Revised: 9/20/2004

Circuit Descriptions for SEIC and Customer Access Signal Circuits
All circuits lead back to pins on the PCM.


F-250/350/450/550 Diesel Engine PCM
Circuit Intent
Wire Tag
Description

INPUT (VPWR)

PTO

PCM PinC1-12 Circuit No. 2242 Wire Color: Orange

Applying vehicle battery voltage to this wire begins SEIC process.
Signals TorqShift transmission to enter SEIC strategy.
Verifies safety enablers.
Turns off OBD and other emission-related monitoring.
Elevates engine speed to target found at PTO-RPM circuit.
Invokes the PTOC circuit when safety enablers are met.
Looks for the target engine speed requested at the PTO_RPM circuit using a resistor or POT.

OUTPUT

PTOC

PCM Pin C2-15 Circuit No. 2244 Wire Color: Orange / Lt. Blue

A low-side driver, changing from "open-circuit" to "ground" indicating all safety enablers
satisfied.
Intended for powering an indicator lamp, or turn on a relay coil.
LED lights require adding a resistor in series (1K ohm, ¼ watt).
Do not feed PCM pin with more than 1 amp.

INPUT (resistor)

PTO_RPM

PCM Pin C1-06 Circuit No. 2246 Wire