NHTSA ID Number: 10172045
Manufacturer Communication Number: IK0800080
TSB/Document Date: 2020-03-04
Summary
J1939 Data Link Troubleshooting
IK0800080 - J1939 Data Link Troubleshooting
Page 1 of 20
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Document
IK0800080
ID:
Availability: ISIS, Bus ISIS, FleetISIS, Body Builder, IsSIR
Revision: 35
Major
System:
ELECTRICAL SYSTEM
Created:
English
Last
2/27/2020
Modified:
Current
Language:
Other
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Languages:
Viewed:
Author:
8/22/2007
Charles
Schroeder
158681
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Title : J1939 Data Link Troubleshooting
Applies To : All Models with 250k Baud Data Link (Black 9-Pin Diagnostic Connector); Overview information for
500k Baud Data Link
Change Log
Dealers: Please refer to the change log text box below for recent changes to this article:
02/27/2020‐ Added information on Nexiq Device Tester's ability to monitor datalink voltages
07/08/2019 ‐ Added addtional notes to refer to troubleshooting manuals for 500k baud (green diagnostic connector) vehicles. Added note in the
description under Step 5, that batteries must be disconnected when measuring resistance.
04/30/2019 ‐ Feedback was inadvertently left on this article. No content change.
03/14/2019 ‐ Added additional note for data link sniffer information.
10/12/2018 ‐ Added additional note under troubleshooting card information. Refer to technician manuals or engine wiring schematics for additional
• This article is for general J1939 troubleshooting on 250k baud data link vehicles. They will have a black 9‐pin diagnostic connector. The
information provided applies to all models. Check the Fault Code Action Plan for the faults you are diagnosing, there may be model
specific FCAP diagnostic information available.
• You MUST review the "Service Information (Known Issues)" section of this iKNow article PRIOR to troubleshooting anything on the truck.
• Related troubleshooting information: For 500k baud vehicles (with a green diagnostic connector) refer to the appropriate
troubleshooting manual found in Master Service Information.
◦ The Nexiq Device Tester application with datalink voltage monitoring works on all J1939 datalinks. See here
Data Link Sniffer Information:
• INTUNE ‐ Modules drop offline or come online live while watching the screen. Will only work on 250k baud rate vehicles.
• Helios ‐ Modules are shown using a message counter. If the counter stops, the module is offline. You can also open a new modules tab
using 'Tools ‐ Modules' to see which modules are currently communicating.
• Nexiq Device Tester ‐ You must choose which channel to connect to when using as a sniffer. Channel 1 or Channel 2. This tool also allows
you to monitor datalink voltages without the need for a multimeter. See here
Click Here for a printable PDF version of this article.
Table of Contents
Description
Service Part(s) Information
500k Baud (Phase 1) Vehicle
Architecture
Symptom(s)
Additional Resources
500k Baud (Phase 2) Vehicle
Architecture
Connector Views
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IK0800080 - J1939 Data Link Troubleshooting
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Special Tool(s) or
Software
Diagnostic Steps
Service Information (Known
Issues)
Related iKNow Article: IK1200921 ‐ ISX, N13, and N9 / N10 Aftertreatment Private Data Link Troubleshooting
Related troubleshooting information: For 500k baud vehicles (with a green diagnostic connector) refer to the appropriate troubleshooting
manual found in Master Service Information.
Description
There are a few things that you need to understand before troubleshooting the 1939 data link.
1. First, the drivetrain J1939 data link, J1939 body builder data link, and J1939 engine data link are three completely separate data links.
◦ For specific examples of modules on each different data link Click Here
2. The different J1939 data links work the same way, but the wiring for them is not connected.
3. The troubleshooting below is geared towards the drive train J1939 data link, but the same principles apply to the body builder and engine
data link.
4. The J1939 data link consists of a twisted pair of yellow and green wires that all the modules on the truck use to communicate with each
other.
5. Two 120 ohm terminating resistors are wired in parallel on the data link. Total resistance on a properly working data link is 60 ohms.
◦ When measuring resistance, the batteries must be disconnected.
6. When you are checking the data link, if the problem is not present, the data link will show good.
7. The J1939 data link may be referred to as data bus, or CAN as well.
8. A module is capable of being connected to the public and private data link, but the information remains separate.
◦ Example: The Body Controller communicates on the public drivetrain data link, but also has the private body builder data link wired
to it.
◦ Example: The EIM communicates on the drivetrain data link, but also communicates with the ECM and ACM on the engine private
data link.
The MaxxForce 7 TMV (Thermal Management Valve) is on the Public data link. This module will not show up on the sniffer.
The ECM Engine and Chassis connector's data link terminals are connected internally to the module.
E13 and C53 are internally connected. E14 and C54 are internally connected.
For Post‐2007 vehicle 1939 troubleshooting, click on the appropriate link below:
• The troubleshooting cards give a good overview of the data link. This will help show you the backbone of the data link (main data link
wiring between 1st terminating resistor to 2nd terminating resistor) and the stubs of the data link (wiring from the backbone to each
possible module)
Basic example of Public J1939 data link
• The J1939 Splice Adapters (1024, 1025, 1026) are part of the backbone of the data link (The backbone will come in on 2 terminals and
leave on 2 different terminals). The wiring from the connector to each module is a stub.
◦ 2007 ‐ HPV (medium duty) 1939 Troubleshooting Card
◦ 2007 ‐ CE / BE Bus 1939 Troubleshooting Card
◦ 2007 ‐ ProStar 1939 Troubleshooting Card
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IK0800080 - J1939 Data Link Troubleshooting
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These cards are 11" x 17" so they may not print well on regular size paper.
Many of the 2010 and newer models have troubleshooting information and CAN network layout in the Technician Manuals, and the engine
wiring schematics.
There are the most current troubleshooting cards that are available for printing. For more information specific to ProStar and LoneStar refer to
the Data Link Service Procedure found in the 2010–2016 ProStar® Technician Manual 0000863170. If you wish to order the above cards, you
can order them through the Navistar
Print Portal from the Service Portal ‐ Dealer Menu. The part numbers are:
Vehicle Model
Part Number
ProStar Card
S00153
DuraStar, TranStar & WorkStar Card
S00155
CE / BE Bus Card
S00154
( Back to Top )
Symptoms
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
SPN
FMI
Module and Source Address (SA)
Description
PRO100 0
Synthetic Fault Code
ProStar/LoneStar J1939 Fault Code Combination
Occurred
PRO100 1
Synthetic Fault Code
ProStar/LoneStar J1939 Fault Code Combination
Occurred
GEN100 0
Synthetic Fault Code
A combination of J1939 Fault Codes Occurred
GEN100 1
Synthetic Fault Code
A combination of J1939 Fault Codes Occurred
GEN100 2
Synthetic Fault Code
A combination of J1939 Fault Codes Occurred
639
9
Body Controller (33)
Drivetrain message timeout
639
14
Body Controller (33)
Drivetrain message timeout
2000
19
Body Controller (33)
PTC1 (PGN 64892) not Received from Engine
2023
9
Body Controller (33)
EGC data link communication failure
2000
9
Gauge Cluster (23) / Body Controller (33) Loss of data link from the Engine Controller
2003
9
Gauge Cluster (23) / Body Controller (33) Loss of data link from the Transmission Controller
2011
9
Gauge Cluster (23) / Body Controller (33) Loss of data link from the ABS Controller
2023
14
Gauge Cluster (23)
Gauge cluster lost communication with the ESC
2023
14
Gauge cluster lost communication with the Engine
Controller
2033
9
Gauge Cluster (23)
Loss of data link from the ESC
560
19
Engine (0)
Transmission driveline engaged not detected on J1939
609
19
Engine (0)
ACM not detected on J1939
639
14
Engine (0)
J1939 data link error (ECM unable to transmit)
639
19
Engine (0)
J1939 data link error (ECM unable to transmit)
751
8,11 Transmission (3)
J1939 Shift Control Device
563
9,14 Transmission (3)
ABS CAN Message
639
2
Transmission (3)
J1939 Communication Link
639
14
Transmission (3)
J1939 Engine Message
639
2
Anti‐Lock Brake System (ABS) (11)
Drivetrain message timeout
639
12
Anti‐Lock Brake System (ABS) (11)
J1939 Serial Link
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IK0800080 - J1939 Data Link Troubleshooting
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639
14
Anti‐Lock Brake System (ABS) (11)
Loss of Data Link from Engine Controller
2853
14
Primary Shifter (5)
Drivetrain message timeout
886
14
Headway Controller (Forward Radar)
(40)
Drivetrain message timeout
Customer Complaint(s):
•
•
•
•
Gauges inoperative (Constant or Intermittent)
Transmission will not go into gear
Warning Lights
Check Electrical Message
( Back to Top )
Special Tool(s) or Software
Tool Description
Tool Number
Comments
INTUNE
EZ‐Tech Software
Helios
EZ‐Tech Software
Diamond Logic Builder (DLB)
EZ‐Tech Software
Navistar Engine Diagnostics™
EZ‐Tech Software
Fluke DVOM
ZTSE4357
Digital Multimeter
Electrical Tester
ZTSE4858
180‐Pin Breakout Box
00‐00956‐08
Breakout box allows for testing engine control module and body
control module systems
Breakout Harness Kit
Multiple
Use breakout harness that is applicable to the system you are
testing
Terminal Test Kit
ZTSE4435C
Kit, Int. Elec. Eng. Terminal Test
Terminal Test Kit
77066‐nav
Hickok Break‐Out Tee Builder And Pin‐Out Tool
( Back to Top )
Diagnostic Steps
• The problem must be present when taking these readings!!
• If the problem is NOT present, the reading will be within spec every time!!
The diagnostic checks listed below can be performed at any module connector
• Making checks at each module connector can help isolate a voltage drop / increase in resistance / short to power or ground
• Use the worksheet below to identify which modules, connectors and terminals you have checked
Connector Terminal Worksheet
• This can also help identify if the J1939_High and J1939_Low wires are pinned incorrectly at a connector
• Due to the many configurations and options available, the terminating resistor can be found in multiple locations (250k only vehicles)
◦ Near the top of the transmission in the Powertrain Harness
◦ Left frame rail (could be as far forward as the steer tire in some applications) in the Center Chassis Harness
◦ Left frame rail (near the radiator bracket) in the Forward Chassis Harness (*if equipped with Forward Radar)
◦ Under the bunk in the sleeper (when factory pre‐wired for telematics)
◦ Near the ACM
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IK0800080 - J1939 Data Link Troubleshooting
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• Be aware there are multiple data links on the truck. You must ensure the terminating resistor is part of the public drivetrain data link, and
not one of the private data links (body builder or engine/aftertreatment)
◦ For Engine Private Data Link Troubleshooting please reference IK1200921
Step
Action
Decision
Yes: Continue to Step 2
1
2
No: Verify proper power and ground to the 9‐pin ATA diagnostic
connector
• Install a comm. device (Nexiq USB, NavCom, NavLink) the
Power aLED
should
• Install
scan
tool. be illuminated.
• Turn the ignition key on, engine off (KOEO).
Yes: Obtain screen shot or record all modules. Continue to Step 3
Is the
Power LED
illuminated?
• Attempt
to establish
communication with a service tool, such
as INTUNE (250k only) or Helios.
• View the data link sniffer to see which modules are
communicating.
No: Continue to Step 6
Are you able to communicate with any of the modules?
Note: Refer to IK0800351 to identify the module to the source
address.
3
• Evaluate modules detected on the sniffer.
Can you identify a module that is NOT communicating?
Yes:
• Check the fuse for that module.
• Load test the battery power, ignition power, ground circuits
at the module connector.
• If ALL power and ground circuits test okay, test the data link
circuits at that module connector using the information
starting at Step 6.
• Repair wiring as needed to allow the module to communicate
on the data link and re‐test the system.
No: Continue to Step 4
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TSB/Document ID: IK0800080
Replacement Service Bulletin Number:
MFR Communication Date: 2020-02-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
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