IK0800080

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: 24
Major
System:
ELECTRICAL SYSTEM
Created:
English
Last
6/28/2017
Modified:
Current
Language:
Other
Portuguese, Français, Español,
Languages:
Viewed:
Author:
8/22/2007
Charles
Schroeder
108753
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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:
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.
01/04/2017 ‐ Added new sections for 500k Baud Vehicle Architecture: Phase 1 and Phase 2
11/17/2016 ‐ Updated Step 19 based on dealer feedback.
10/04/2016 ‐ Noted the troubleshooting cards in the article are the most current that are published. Noted when inspecting splice welds, visual


• 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.
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.
◦ For specific examples of modules on each different data link Click Here
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 2 of 19
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 )
Symptoms
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 3 of 19
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
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
INTUNE
Tool Number
Comments
EZ‐Tech Software
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IK0800080 ­ J1939 Data Link Troubleshooting
Helios
EZ‐Tech Software
Diamond Logic Builder (DLB)
EZ‐Tech Software
Navistar Engine Diagnostics™
EZ‐Tech Software
Page 4 of 19
Fluke DVOM
ZTSE4357
Electrical Tester
ZTSE4858
Digital Multimeter
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)
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.
• Install a scan tool.
Is the
• Turn
Power
theLED
ignition
illuminated?
key on, engine off (KOEO).
• Attempt to establish communication with INTUNE.
2
3
Yes: Obtain screen shot or record all modules. Continue to Step 3
Are you able to communicate with any of the modules?
No: Continue to Step 6
Note: Refer to IK0800351 to indentify the module to the source
address.
• Evaluate modules detected on the sniffer.
Yes:
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IK0800080 ­ J1939 Data Link Troubleshooting
Can you identify a module that is NOT communicating?
Page 5 of 19
• 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?
Yes: Obtain a screen shot of the DTCs in ALL modules (ECM, ABS,
TCM, BC, etc....). Continue to Step 5
No: Evaluate complaint to determine if a data link issue is present.
Determine if faults were previously cleared.
Yes:
• Evaluate fault counts by modules
5
Do one (or more) modules show high fault counts of loss of
communication fault (Other modules would have low counts)?
• Load test the battery power, ignition power and ground
circuits at the module connector.
• If ALL power and ground circuits test okay, inspect the stub
wiring from the module connector to the backbone of the
data link.
• Ensure all terminals are properly seated and fully locked in
the connector.
• Inspect for spread terminals using a terminal test kit to pin
drag test the terminals.
• Verify the wires are pinned properly in the connector for
High(+) and Low(‐).
• If wiring goes to splice connector (heat shrink) cut open and
inspect, tug on each end and check for proper weld. You will
need to recrimp, solder and heat shrink after making this
inspection.
• Use the information starting at Step 6 to assist.
• If an issue is identified and repaired, re‐test for the
complaint.
• If no issue is identified, continue to Step 6
No: Continue to Step 6
Yes: Continue to Step 7
6
No: Continue to Step 8
• Measure the voltage at the ATA Diagnostic Connector
Terminal C to Gnd and D to Gnd.
Is there approximately 2.5 Vdc at each terminal?
7
Does the voltage on C and D match?
Yes:
Note: Terminal C should have slightly higher voltage than Terminal
D.
• A module not communicating can put 2.5Vdc on each data
Note: The voltages should not match
link wire.
• Monitor voltage at the 9 pin diagnostic connector while
unplugging modules
• If the voltage changes and communication resumes suspect
an issue at that module
◦ Load test the battery power, ignition power and ground
wiring to that module
◦ Inspect the data link stub from the module connector to
the backbone
◦ If no wiring issue is located suspect a faulty module
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 6 of 19
• If no change in voltage is noted when modules are unplugged
inspect for data link High(+) and Low(‐) shorted together
No: Continue to Step 10
8
Does either terminal have abnormally high voltage?
9
Does either terminal have abnormally low voltage?
Yes: Check wiring for a Short to Power
No: Continue to Step 9
Yes: Check wiring for a Short to Ground
No: Return to Step 6 and re‐test.
Yes: Continue to Step 11
No:
10 Is the voltage on Terminal C (+) higher than Terminal D (‐)?
11
• Disconnect the batteries.
• Measure the resistance from Terminal C to D.
• 60 ± 5%
Do you have 57 ‐ 63 ohms?
• All truck harnesses should be connected for this step.
• Only the batteries should be disconnected.
12
Do you have approximately 120 ohms?
13 Does the resistance read O.L (Open)?
• Verify the wire is in the correct terminal location.
• Verify the wiring is spliced to the correct wire of the
backbone.
Yes: Continue to Step 16
No: Continue to Step 12
Yes: Continue to Step 18
No: Continue to step 13
Yes: Inspect stub wiring from the module connector to the
backbone of the data link. Repair wiring as needed and re‐test.
No: Continue to step 14
14 Is the resistance near 40 ohms?
Yes: Inspect for body builder components that may have installed
a 3rd terminating resistor
No: Continue to Step 15
15 Is the resistance < 40 ohms
16
• Measure the resistance from Terminal C to Gnd
Does resistance measure > 1000 ohms?
17
• Measure the resistance from Terminal D to Gnd
• Unplug
themeasure
1702 connector.
Does
resistance
> 1000 ohms?
• Measure resistance on connector 1702 (Male Terminals)
◦ Note: This wiring harness runs outside the cab
• 120 ± 5%
18
Is the resistance 114 ‐ 126 ohms?
19 It is recommended not to exceed ± 1 % tolerance between the
two• identical
resistors.
Unplug the
1702 connector.
• Measure resistance on connector 1702 (Female Terminals)
◦ Note: This wiring harness runs to the pass through on
the right side the cab and continues through the dash
over to the 1701 connector on the left side of the cab
• 120 ± 5%
Is the resistance 114 ‐ 126 ohms?
Yes: Inspect data link wiring for High(+) and Low(‐) shorted
together
No: Return to Step 11 (Resistance out of range has not been
detected)
Yes: Continue to Step 17
No: Inspect data link wiring for a short to ground.
Yes: Continue to Step 18
No: Inspect data link wiring for a short to ground.
Yes: Continue to Step 19
No: Continue to Step 20
Yes: Wiring issue not detected. Re‐evaluate the complaint and
troubleshooting. Is the issue present?
If the issue is present, and the wiring checks okay, remove
modules from the data link, one module at a time until
communication is restored.
No: Continue to Step 21
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 7 of 19
It is•recommended
not toResistor
exceed #1.
± 1 % tolerance between the
Locate Terminating
two• identical
resistors.
Unplug the terminating resistor and measure the resistance
from terminal A to B on the resistor.
• Compare this to the resistance measured at Step 18
• 120 ± 5%
Yes: Locate and repair open wire in the circuit between the 1702
connector and the terminating resistor.
20
Is the resistance 114 ‐ 126 ohms?
No: Replace the terminating resistor and re‐test.
• Locate Terminating Resistor #2.
• Unplug the terminating resistor and measure the resistance
If thisfrom
resistance
does
not
closely
match the resistance measured
terminal
A to
B on
the resistor.
Yes: Locate and repair open wire in the circuit between the 1702
at the
1702
connector
at
Step
18,
it may
indicate
high 19
resistance
• Compare this to the resistance
measured
at Step
connector and the terminating resistor.
in the
circuits.
• 120
± 5%
21
Is the resistance 114 ‐ 126 ohms?
No: Replace the terminating resistor and re‐test.
If this resistance does not closely match the resistance measured
connector at Step 19, it may indicate high resistance
( Back at
to the
Top1702
)
in the circuits.
Service Part(s) Information
Description
Part Number
Bulk Data Link Cable
3519281C2
Terminating Resistor
3519178C91
( Back to Top )
Additional Resources
• SFN 02‐94 ‐ J1939 Troubleshooting
• Advanced Electrical Guide
• Master Service Information Page
( Back to Top )
Connector Views
• Always refer to the wiring schematic book for the vehicle you are working on
• Verify which specific engine you are working with. This will help ensure you are viewing the correct schematic with the correct terminal
locations on the ECM connector
J1939 Data Link (CAN) Pin out at major connectors
(Public Data Link Only)
Module
Connector
Diagnostic Connector
1650
J1939 Splice Adapter
Note: There is no terminal "I"
1024
1025
1026
J1939 Pins
Location
Pin (+)
Pin
(‐)
Dash panel left of
steering wheel
(Bus‐under dash right
of steering wheel)
C(+)
D(‐)
Center of dash panel
Connector View
GM AF
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 8 of 19
1702 ‐ Male Terminals
Goes to Engine
1702
Attached to wiper
bracket
Above valve cover
11(+) 17(‐)
1702 ‐ Female Terminals
Goes to Cab
1702
Attached to wiper
bracket
Above valve cover
11(+) 17(‐)
6018
Engine ECM
34(+) 47(‐)
ECM ‐ ISX 15L
6000
Engine ECM
22(+) 46(‐)
ECM ‐ ISB
6000
Engine ECM
22(+) 46(‐)
EIM ‐ MaxxForce 11 / 13 (EPA
07)
(Engine Interface Module)
6020
Left side of engine
12(+) 13(‐)
ECM ‐ N9 / N10
6020M
Right side of engine
61(+) 62(‐)
ECM
◦ N13
◦ MaxxForce 15
◦ MaxxForce 13 / 11
(EPA 10)
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 9 of 19
6020M
Right side of engine
Mounted on air filter
bracket
53(+) 54(‐)
6020M
Left side of engine
76 Pin Chassis
connector
(Grey)
C61
(+)
DLCII Engine ECM
X3 ‐ 6020
Left side of engine
above starter (I6)
Top of left valve
cover (V8)
12(+) 13(‐)
DLC NavPak Engine ECM
6007
Engine ECM ‐ Black
19(+) 20(‐)
ECM ‐ MaxxForce 7 (EPA 10)
ECM
◦ MaxxForce DT / 9 /
10
(EPA 07 / EPA 10)
◦ MaxxForce 7 (EPA
07)
◦ MaxxForce 5 (EPA
07)
C62
(‐)
Engine DCU ‐ Doser Control
Unit
◦ MaxxForce DT / 9 /
10 (EPA 10)
◦ N9 / N10 (EPA 10)
6340
Collision Avoidance ‐ Bendix
Wingman
8903
Bendix Wingman DIU (Driver
Interface Unit)
1943M
ABS ‐ Bendix Air EC60
1400
14(+) 15(‐)
Front bumper
In cab ‐ Right kick
panel
1(+)
6(‐)
7(+)
6(‐)
8(+)
7(‐)
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 10 of 19
ABS ‐ Bendix Air EC30
4024
Brake ECU
C3(+) D3(‐)
ABS ‐ Wabco Air
9513
Wabco ECU Grey
7(+)
6(‐)
ABS ‐ Wabco Air
1420
In cab ‐ Right kick
panel
3(+)
1(‐)
Collision Avoidance ‐ Wabco
OnGuard
8902
Front bumper
4(+)
5(‐)
Wabco OnGuard DIU (Driver
Interface Unit)
1944
A(+)
B(‐)
Wabco Hydraulic Full Power
Brakes
9511
ECU is mounted on
HCU
Left Frame Rail
14(+) 15(‐)
Allison LCT TCM
7305
TCM Grey
29(+) 32(‐)
TCM ‐ Allison LCT Gen 4
7150
7151
Under cab
28(+)
8(‐)
TCM ‐ Allison
1503
In cab
10(+)
9(‐)
Allison MD / HD 3000
7204F
TCM Black
13(+) 29(‐)
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IK0800080 ­ J1939 Data Link Troubleshooting
TCM
Page 11 of 19
Allison MD / HD 3000 Gen 4
7151
28(+)
8(‐)
Allison TC10 Shift Selector
Allison WTEC Shift Selector
1852
8(+)
15(‐)
ESC ‐ Electrical System
Controller
1600
In cab ‐ Left kick
panel
34(+) 35(‐)
BC ‐ Body Controller
1602 (J5)
In cab ‐ Left kick
panel
F3(+) F2(‐)
EGC ‐ Electronic Gauge Cluster
1500
Left side of dash
4(+)
EGC ‐ Electronic Gauge Cluster
1501
Left side of dash
12(+) 11(‐)
Compass Module
1912
Behind fuse
panel (HPV)
Center of headliner
(5000/9000)
2(+)
3(‐)
SART Module
1610
In dash ‐ behind EGC
C(+)
D(‐)
SIC (Secondary Instrument
Cluster)
1502
Center dash
7(+)
4(‐)
5(‐)
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IK0800080 ­ J1939 Data Link Troubleshooting
Page 12 of 19
Optional Gauge Pack
1510
AGSP (Aux Gauge Switch Pack)
1512
Right side dash
11(+) 10(‐)
TPMS (Tire pressure monitor
system)
8993F
Near radiator
crossmember
12(+) 11(‐)
Eaton Autoshift / Ultrashift
DM2
7905
At Gear Shift Selector G2(+) G3(‐)
Eaton Autoshift / Ultrashift
DM3
7105
7909
7910
TCM
Eaton Vorad
1227
Eaton Vorad VS‐400
8901
PAM Pyro ‐ AMP Meter Module 4087
11(+) 10(‐)
3(+)
2(‐)
D7(+) D8(‐)
Center of bumper
support bracket
4(+)
5(‐)
Cowl
7(+)
8(‐)
Cummins ISM Engine ECM
6000
6014
Engine ECM
46(+) 47(‐)
CAT Engine ECM
6013
Engine ECM
50(+) 34(‐)
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IK0800080 ­ J1939 Data Link Troubleshooting
Meritor Freedomline Trans
TCM
7103
TCM
Page 13 of 19
A(+)
B(‐)
( Back to Top )
Service Information (Known Issues) ‐ Potential failure location based on case file information
• 05/12/2016 ‐ The EZ‐Tech Launcher can slow down data link traffic causing fault codes to set when no issue is present.
• Typically these faults are INACTIVE, and have very low counts when they are caused by the service tool.
• Do not diagnose these Inactive faults without a driver complaint.
◦ Possible DTCs
SPN
FMI
Module
Description
2000
9
Body Controller
Cluster
ECM Data Link Comm. Failure
Loss of data link from the Engine Controller
2003
9
Body Controller
Cluster
TCM Data Link Comm. Failure
Loss of data link from the Transmission Controller
2011
9
Body Controller
Cluster
ABS Data Link Comm. Failure
Loss of data link from ABS Controller
2000
19
Body Controller
PTC1 (PGN 64892) not received from Engine
2023
9
Body Controller
EGC Data Link Comm. Failure
639
2
Brakes, System Controller
Loss of data link from Engine Controller
639
14
Brakes, System Controller
Loss of data link from Engine Controller
SID 231
2
Brakes, Power Unit
SAE J1939 Data Link
SID 231
14
Brakes, Power Unit
SAE J1939 Data Link
NOTE: For a screen shot of this occurring on the Launcher Screen CLICK HERE
• 6/9/2014 ‐ Recent information from the field has shown a potential failure location
• A poor connection on the splice the ties the ABS module into the Back‐bone of the data link was found on multiple units
◦ This splice is in the cab, and the harness is common between multiple chassis and engine platforms
◦ At this time (6/9/2014) the earliest build date affected is 09/23/2013
◦ Anything built after this date is suspect for splice issues
◦ Possible DTCs
SPN
FMI
Module
Description
639
9
ECM
Drivetrain Message Timeout
639
9
Body Controller
J1939 Drivetrain Data Link Lost
2011
9
Body Controller
ABS Data Link Comm. Failure
2000
9
Body Controller
ECM Data Link Comm. Failure
2023
9
Body Controller
EGC Data Link Comm. Failure
2003
9
Body Controller
TCM Data Link Comm. Failure
2000
19
Body Controller
PTC1 (PGN 64892) not received from Engine
2000
9
Instrument Cluster
Loss of Data Link from Engine Controller
2011
9
Instrument Cluster
Loss of Data Link from ABS Controller
2003
9
Instrument Cluster
Loss of Data Link from the Transmission Controller
2033
9
Instrument Cluster
Loss of Data Link from the ESC
• If you have these faults and the vehicle build date is near August 2013 or Newer you will need to troubleshoot this splice in the data link if no obvious
failures are found
• Follow the harness from the ABS module to the Data Link Backbone. Once you locate the splice, wiggle test that connection (also twist the spice in your
fingers) while monitoring the data link resistance. (If a resistance check does not show any fault, repeat this test monitoring data link voltage as well)
• Cab temperature was effecting the data link behavior in one of the vehicles found to have this issue
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• Inspecting the splice is destructive, you will need to remove the splice section use a closed barrel butt connector to crimp, solder and heat shrink the
splice location. Use proper wire repair techniques as outlined in IK0800269 ‐ Proper Wire Repair
Crimp location: Right side of cab above the ABS module, next to the HVAC box. The condensation module (if installed) will be zip tied to or near the splice.
Close view of crimp location
Harness removed from truck for identification
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Wire condition at crimp to ABS module
Wire condition at crimp to ABS module (2nd photo)
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Examples of Modules for 250k Baud
• The 250k Baud Drivetrain data link is a Public data link which consists of any module that is present on the data link when you plug into
the ATA diagnostic connector.
• Examples:
ECM
Body Controller
TCM
Instrument Cluster
ABS
Collision Avoidance System (Wingman, OnGuard)
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.
• The Body Builder data link is a Private data link which consists of modules communicating to each other. You cannot use a diagnostic
tool to communicate with this private data link.
• Examples:
Body Controller (This module is on the public and private data link
independently)
Sleeper HVAC (Standard and No‐Idle systems)
RPM (Remote Power Module)
• The Engine data link is a Private data link which consists of engine related modules communicating to each other. You cannot use a
diagnostic tool to communicate with this private data link.
• Examples:
EPA07 MaxxForce 11 / 13
EPA10 N13 SCR
EPA10 ISX15 SCR
ECM
ECM
ECM
EIM
ACM
VGT
ACM
AFT Modules / Sensors
AFT Modules / Sensors
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500k Baud Vehicle Architecture ‐ Phase 1
This can be properly identified by looking in the components tab of the vehicle and looking for a GREEN 9‐Pin connector and feature:
0508095 ‐ ELECTRICAL SYSTEM ENHANCED VCM FUNCTIONS for VCM Enhanced Functions
500k Phase 1 Vehicle Data Link Topology
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500k Baud Vehicle Architecture ‐ Phase 2
This can be properly identified by looking in the components tab of the vehicle and looking for a GREEN 9‐Pin connector and feature:
0508097 ‐ ELEC SYS MUX COMMON ARCHITECTURE for Electrical Common Architecture System
• This feature and vehicle architecture launched with the LT Model
500k Phase 2 Vehicle Data Link Topology
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IK0800080 ­ J1939 Data Link Troubleshooting
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