NHTSA ID Number: 10162091
Manufacturer Communication Number: TSB110181-052420
Summary
This Technical Service Bulletin describes the verification and resolution of engine speed instability related to truck vacuum blower or pump engagement. Some units with transfer cases have exhibited engine speed instability when the vacuum blower or pump is engaged. New engine control module software can address most of these issues. This is an update to a previously submitted communication.
5 Affected Products
Equipments
Technical Service Bulletin
| Technical Service Bulletin:
TSB110181 | Released Date: 24-May-2019 |
| Engine Speed Instability Related to Truck Vacuum Blower or Pump Engagement | |
Engine Speed Instability Related to Truck Vacuum Blower or Pump Engagement
Core Issue
Some units, with transfer cases, have exhibited engine speed instability when the vacuum blower or pump is engaged. This instability typically causes the operator to shut down the system. Some units only exhibit this instability when the transmission is in an overdrive gear. New engine control module (ECM) software added a feature called Transmission Driven Power Take-Off (PTO). This new ECM software/feature can address most of these issues.
Confirmation
Product Affected:
- ISL9 CM2350 L101
- ISX15
CM2250 - ISX15 CM2250 SN
- ISX15 CM2350 X101
- ISX12 CM2350 X102
- ISX12/ISX11.9 CM2250
- X12 CM2350 X119B
In order to properly test for instability; the unit must be operated with the transmission in an upper gear, the transfer case engaged, and a load placed on the engine.
- If the unit displays vehicle speed on the dash during operation, most likely the Transmission Driven PTO feature is not properly set up.
- The truck body builder may have disabled the vehicle speed sensor (VSS) signal to the ECM.
- The truck original equipment manufacturer (OEM) may have installed an additional PTO switch that may be labeled “PTO Control”. This switch will disable the VSS signal to the ECM.
- Check that the ECM has the latest available calibration. Engines built prior to April 2011 were shipped with older calibrations.
- Check for fault codes, including intermittent ones.
- If the vehicle has a Parking Brake Switch input that is either wired directly to the ECM or is multiplexed within, INSITE™ electronic service tool Parking Brake Switch must be ENABLED.
Note : If the vehicle does not have a parking brake switch input, then the OEM or body builder must install the governor type switch to indicate to the ECM when the transfer case is engaged.
Resolution
- Proper settings for Transmission Driven PTO:
- PTO – Alternate Operation – Enable (Recommended for fire trucks and vacuum trucks only)
- PTO – Ignore Vehicle Speed Source in PTO – Disable
- PTO – Transmission Driven PTO – Enable
- PTO – Transmission Driven PTO – Transmission Driven PTO Type – Transmission Driven – Irregular Load.
- Proper settings for PTO:
- PTO – Maximum Engine Load – Backward calculate, using the manufacturer’s torque rating for the PTO device and the gear ratio between the device and the engine. Maximum Engine Load = Rated Torque/Gear Ratio.
- Restore the VSS signal back to original factory condition. Ensure the VSS circuit is not The ECM must read vehicle speed for the feature to work.
- Update the ECM calibration if not already up-to-date.
- Repair all fault codes.
If none of the above resolves the issue, contact your authorized Cummins® repair location. For authorized Cummins® repair locations, follow your technical support escalation process.
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.
Document History
| Date | Details |
|---|---|
| 2011-6-14 | Module Created |
| 2011-12-21 | Updated Information. |
| 2012-2-27 | Updated Information. |
| 2014-9-29 | Additional engines added. |
| 2015-4-22 | Additional engines added. |
| 2016-3-14 | Added statement about transfer cases, note about parking brake switch input, and recommendation for fire trucks and vacuum trucks only. Changed reference about placing a load on the engine vacuum system to placing a load on just the engine. |
| 2019-5-24 | Added X12 CM2350 X119B |
Last Modified: 24-May-2019
Technical Service Bulletin:
TSB110181
Heavy Duty Truck Reprogramming
Description:
Designed for flexibility, the USB-Link 3 Wired Edition connects to your PC, tablet, or smartphone with a USB cable, allowing techs to directly connect to a device when working in the field or during signal interruptions.
Built to support the latest protocols (CAN FD, DoIP) and compatible with a wide range of OEM diagnostics software, the USB-Link 3 is our most advanced VCI to date, with the performance and technology you can rely on well into the future.
The USB-Link™ 3 comes with the following:
- Latching USB Cable (PN 404032)
- 9-Pin Deutsch Adapter, 1 Meter (PN 493128)
- J1962 Adapter (16-Pin OBD II, 1 Meter (PN 491113)
The USB-Link™ 3: Wireless is also available (PN 121052).
Specifications
Vehicle Network Protocol Support
CAN FD / J1939 FD / ISO15765 FD - 250K, 500K, 1M b/s with auto baud detection
Single wire CAN (SWCAN)
ISO 11898-3 Fault Tolerant CAN (FTCAN)
Diagnostics Over Internet Protocol (DoIP)
J1708
J1850 VPW (Class 2)
ISO PWM (SCP)
ISO 9141 / KWP2000 (ISO 14230) K/L line
ALDL 9600 and 8192 baud
ATEC 160 baud
Windows® Vehicle Communication API
Windows® Vehicle Communication API
RP1210 a/b/c
J2534 (2004 draft)
J2534-1 partial implementation (commercial vehicle focused)
Operating System Compatibility
iOS
Android™
Windows® 10, 11
Interfaces to Computing Platforms
USB 2.0 (vehicle-to-PC connectivity)
Bluetooth® 2.1 + EDR
Wi-Fi (dual band)
Compatible Software
Detroit Diesel Diagnostic Link
CAT Electronic Technician (On-Highway only)
Cummins Insite
International - ServiceMAXX Fleet Pro
Hino eXplorer
Volvo PTT
VCAD Elite Mack/Volvo
V-MAC Service Tools
Allison DOC® For PC-Service Tool - Protocols Supported: J1939, J1708/J1587, and J1850
Allison DOC® For Fleets (1000/2000) - Protocols Supported: J1939, J1850
Allison DOC® For Fleets (3000/4000) - Protocols Supported: J1939, J1708/J1587
Eaton ServiceRanger
Bendix ACom
WABCO Toolbox
Freightliner ServiceLink
International ABS
International DLB
International Intune
International IPC v2.02
PACCAR DAVIE4
Daimler Truck
DiagnosticLink Order Site:
DiagnosticLink Direct Link:
https://diagnosticlink.nexiq.com/DTNA/Default.aspx
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