TSB160055-041720

4/29/2020
SmartAccel™ Feature Release and Initial Tuning Guide
Technical Service Bulletin
Technical Service Bulletin: TSB160055
Released Date: 17-Apr-2020
SmartAccel™ Feature Release and Initial Tuning Guide
SmartAccel™ Feature Release and Initial Tuning
Guide
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
ISX12 CM2350 X102
ISX15 CM2350 X101
X15 CM2350 X114B
X15 CM2450 X124B
X12 CM2350 X119B
Manual transmissions only.
Issue
Customer has concerns with vehicle powertrain robustness or has experienced powertrain
component malfunctions when launching the vehicle from a stop.
Resolution
The SmartAccel™ feature has been released to increase powertrain robustness during a vehicle
launch. This is a user-selectable feature in INSITE™ electronic service tool. When enabled, the
SmartAccel™ feature will limit the rate at which torque is applied to the flywheel. This feature is
designed to protect powertrain components from impact torque from harsh events such as a clutch
dump when the Accelerator Pedal Position is 100%. The SmartAccel™ feature is designed to
protect powertrain components on all transmissions.
Enabling SmartAccel™ Feature
1. Determine Gear Ratio Threshold
Connect INSITE™ electronic service tool version 8.1.2 or newer.
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SmartAccel™ Feature Release and Initial Tuning Guide
Verify/Install engine control module (ECM) calibration code with SmartAccel™ feature. ECM
calibration codes after 30 Mar 2016 have the SmartAccel™ feature.
Enable SmartAccel™ in Features and Parameters.
Determine highest gear used by customer at vehicle launch.
Determine transmission gear ratios of the vehicle. See equipment manufacturer service
information. See Table 1 below for example gear ratios.
Table 1, Example Gear Ratios
Gear
Numb
er
1
2
3
4
5
6
7
8
9
10
Gear
Ratio
14.8
10.95
8.09
5.97
4.46
3.32
2.45
1.81
1.34
1.00
Determine average gear ratio between highest launch gear and next highest sequential gear.
For Example:
If third gear is the highest launch gear; the average ratio of third gear and the next higher
gear (fourth gear), is as follows.
( 8.09 + 5.97 )/2 = 7.03
Set 7.03 as the gear ratio threshold for SmartAccel™.
2. Determine Torque Ramp Rate Value
Connect INSITE™ electronic service tool version 8.1.2 or newer.
Select Features and Parameters and select Vehicle Speed Source to see Rear Axle Ratio.
If rear axle ratio < 2.47, then input 370 lb*ft/s [ 500 N•m/s ] for Torque Ramp Rate.
If 2.47 <= rear axle ratio < 3.91, then input 553 lb*ft/s [ 750 N•m/s ] for Torque Ramp Rate.
If 3.91 <= rear axle ratio, then input 737 lb*ft/s [ 1000 N•m/s ] for Torque Ramp Rate.
Customer Communication
Decrease in acceleration in the first few gears from launch may be observed.
Production Status
SmartAccel™ feature has been implemented for production. See Table 2.
Table 2, Production Information
Product
Engine Serial
Number (ESN) First
Build Date*
Engine Plant
ISX12 CM2350 X102
75050864
6 Apr 16
Jamestown Engine
Plant
ISX15 CM2350 X101
79912573
5 Apr 16
Jamestown Engine
Plant
*Engine build date can be found on the engine dataplate.
Document History
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SmartAccel™ Feature Release and Initial Tuning Guide
Date
Details
2016-5-31
Module Created
2020-4-16
Non-Product Problem Solving (PPS)
Last Modified: 17-Apr-2020
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