IK0800080 Service Bulletin/Repair Instructions

IK0800080 ­ J1939 Data Link Troubleshooting
Page 1 of 19
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Document

IK0800080

ID:
Availability: ISIS, Bus ISIS, FleetISIS, Body Builder, IsSIR
Revision: 27
Major

System:
ELECTRICAL SYSTEM
Created:
English
Last

1/22/2018

Modified:
Current

Language:
Other

Portuguese, Français, Español,

Languages:

Viewed:
Author:
8/22/2007
Charles

Schroeder
121336

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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:

01/22/2018 ‐ Added link to IK1200921 for private data link troubleshooting based on dealer feedback

08/11/2017 ‐ Updated 500k Baud (Phase 2) Vehicle Architecture to show the Switch Pack(s) are part of the HMI data link backbone.

08/09/2017 ‐ Updated steps 12‐15 to clarify what resistance measurement is being referenced based on dealer feedback.

06/28/2017 ‐ Added graphic to Step 1 for power and ground at diagnostic 9‐Pin connector based on dealer feedback.

04/27/2017 ‐ Updated diagnostic software to Navistar Engine Diagnostics™.

01/12/2017 ‐ Added French and Spanish translations.


• 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.

• IK1200921 ‐ ISX, N13, and N9 / N10 Aftertreatment Private Data Link Troubleshooting
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
Special Tool(s) or

Software
Connector Views
Diagnostic Steps
Service Information (Known

Issues)
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.
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IK0800080 ­ J1939 Data Link Troubleshooting
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◦ 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.

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.

◦ HPV (medium duty) 1939 Troubleshooting Card

◦ CE / BE Bus 1939 Troubleshooting Card

◦ ProStar 1939 Troubleshooting Card
These cards are 11" x 17" so they may not print well on regular size paper.

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 )
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 3 of 19
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 (23)
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
639
14
Anti‐Lock Brake System (ABS) (11)
Loss of Data Link from Engine Controller
2853
14
Primary Shifter (5)
Drivetrain message timeout
14
Headway Controller (Forward Radar)

(40)
Drivetrain message timeout
886
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
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IK0800080 ­ J1939 Data Link Troubleshooting
INTUNE
EZ‐Tech Software
Helios
EZ‐Tech Software
Diamond Logic Builder (DLB)
EZ‐Tech Software
Navistar Engine Diagnostics™
EZ‐Tech Software
Page 4 of 19
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 gound

• 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

• 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
No: Verify proper power and ground to the 9‐pin ATA diagnostic

connector

• Install a comm. device (Nexiq USB, NavCom, NavLink) the

Power LED should be illuminated.
2
Is the Power LED illuminated?

• Install a scan tool.

• Turn the ignition key on, engine off (KOEO).

• Attempt to establish communication with INTUNE.
Yes: Obtain screen shot or record all modules. Continue to Step 3

No: Continue to Step 6
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IK0800080 ­ J1939 Data Link Troubleshooting
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Are you able to communicate with any of the modules?

Note: Refer to IK0800351 to indentify the module to the source

address.

Yes:
3
• Evaluate modules detected on the sniffer.

Can you identify a module that is NOT communicating?
• 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
4
• Check for Diagnostic Trouble Codes (DTCs)

Are communication DTCs present in any of the modules?

12 3

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