TSB210058

10/4/21, 9:35 AM
Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
Technical Service Bulletin
Technical Service Bulletin: TSB210058
Released Date: 02-Sep-2021
Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
Engine Wiring Harness Malfunctions Causing J1939
Datalink Faults
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
B6.7 CM2350 B121B
B6.7 CM2350 B135B
B6.7 CM2350 B148B
B6.7 CM2350 B153B
B6.7 CM2450 B155B
ISB6.7 CM2350 B101
ISB6.7 CM2450 B155B
ISL9 CM2350 L101
L9 CM2350 L116B
L9 CM2350 L119B
L9 CM2350 L123B
L9 CM2450 L126B
QSB6.7 CM2350 B105
QSL9 CM2350 L102
Issue
Engine wiring harness issues on J1939 datalink are causing datalink related fault codes.
Symptom:
Amber check engine light
Occurrence of one or more of the following Fault Codes: 1894, 2771, 3232, 3868, 3911, 4151,
4152, 4572, 4677, or 6688.
Root Causes:
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Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
Engine wiring harness chafing
Use of dielectric grease in connector
Water intrusion into 14 pin connectors (example: OEM cross over connector, connectors on
both ends of OEM aftertreatment jumper harness, and aftertreatment harness connector).
Verification
Check the following before ruling out intermittent engine wiring harness issues:
1. Visually inspect the variable geometry turbocharger and aftertreatment interface wiring harness
for evidence of wear or damage caused by chafing. See Figure 1 below.
Figure 1, Wire Chafing.
2. If checking a connector while following the published troubleshooting tree, visually inspect the
connector for evidence of dielectric grease usage. See Figure 2 below.
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Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
Figure 2, Dielectric Grease in Connector.
3. If checking a 14 pin connector while following the published troubleshooting tree, inspect
connector for evidence of water intrusion or corrosion. See Figure 3 below.
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Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
Figure 3, Evidence of Water Intrusion or Corrosion.
Figure 4, Evidence of Water Intrusion or Corrosion.
Resolution
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Engine Wiring Harness Malfunctions Causing J1939 Datalink Faults
If evidence of engine wiring harness chafing is observed, remove and replace that section of
the engine wiring harness before replacing any other component.
If there is evidence of dielectric grease usage in a connector, remove the dielectric grease and
clean the connector.
If there is evidence of water intrusion through into a connector, follow the corresponding
service procedure to repair or replace the connector.
Document History
Date
Details
2021-3-8
Module Created
2021-8-31
Updated product affected. Added Figure 4.
Last Modified: 02-Sep-2021
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