NHTSA ID Number: 10244768
Manufacturer Communication Number: SS3127
TSB/Document Date: 2023-11-03
Summary
Service Solution for M2 & SD CEEA+ Trucks Odometer Disable in Split Shaft PTO Mode
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> SS 3127 M2 & SD CEEA+ Trucks Odometer Disable in S...
SS 3127 M2 & SD CEEA+ Trucks Odometer Disable in
Split Shaft PTO Mode [aaa
Applicable Vehicles
M2 & SD CEEA+ Trucks with Allison transmissions with fifth and sixth generation transmission
control modules (TCMs)
Symptoms
Vehicle collects miles while sitting stationary in PTO mode
Issue
M2 & SD CEEA+ trucks do not have factory enabled Split Shaft features allowing the vehicle to
collect miles while sitting stationary in PTO mode
Solution
Prerequisites
The following features must be installed on the vehicle prior to using these instructions. If they
were not ordered with the vehicle, they can be requested through the Tech Mod Request process or
created using aftermarket components.
Data Code Description
Transmission interface wiring to the Powertrain
340-011 TEM Interface Connector (PTIC)
48H- ANY PTIC
343
Allison vocational package with pump mode are
required. Example: Allison 3000/4000 RDS with the
following Allison packages are available - 149, 150,
172, 216, 266
Refer to Allison Vocational Model Guide for I/O
packages on your specific model.
General Design
‘This design allows normal operation of the Speedometer aed Odometer when the vehicle i driving. The relay installed in
‘the OSS circuit will switch from the Output-shaft Speed Sensor toa Resistor that vimulates Zero vehicle speed when the
transmission isin Purp Mode.
Operation
installed pee these instructions, no operator input is required.
Upfit Instructions
stall Relays, Wiring & Resistor as shown in Figure 2,
‘All Numbered circuits shown in the following diagram ace included in truck wiring l the 48M PTIC Connector was ordered
‘withthe track. All other circuits, relays, resistor are to be completed in Service,
Relay operation will be controled by safety interlocks determined by the Truck Equipment Mansfacturerthat is
lnstaling the Splt-Shaft PTO Engagement Contra. At a micimum, OTMA recommends using a signal that confirms the
Park Brake is engaged,
‘These wiring modifications can be completed on the Frontwall near the Allison TCM. Disconnect the battery
before removing the VPOM mounting bolts to access the TCM.
‘The 48H Powertrain intertace connector will be on the drivers side at the Back of Cab or Between the Seats as
it was ordered on the truck.
Pump Mode and Direct Drive must bath be active before the OSS signal is removed or the transmission will
lock into the current gear and register fault codes.
PTO Mode in the Detroit Engine must be activated after 4" Gear lockup
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TSB/Document ID: SS3127
Replacement Service Bulletin Number:
MFR Communication Date: 2023-10-20
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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