Technical Service Bulletin DT12 Trans Chafe — 2016 WESTERN STAR 4900
EQUIPMENT ADAPTIVE/MOBILITY
Bulletin Details
| TSB ID | DT12 Trans Chafe |
| Manufacturer | |
| Vehicle | 2016 WESTERN STAR 4900 |
| Component | EQUIPMENT ADAPTIVE/MOBILITY |
| Communication Date |
Bulletin Summary
DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to be causing issues to the After Treatment Control Module (ACM). These fault codes indicated that the ACM communication message was not received by the Motor Control Module (MCM) which in certain cases, led to a 25% engine de-rate situation. Further diagnosis revealed that the DT12 wiring harness was chafing and contacting the transmission TCU case. To reduce potential chafing areas, the proposed short-term containment was to route the wiring harness using additional tie straps. This communication applies to Freightliner and Western Star vehicles built with DT12 transmissions.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2016 WESTERN STAR 4900
D24R4-OWN LTR
ENGINE
DT12 Trans Chafe
POWER TRAIN
WI21-006
ELECTRICAL SYSTEM
SS1034615
VISIBILITY
FL821
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
18-032-NoDefectF
ELECTRICAL SYSTEM
DD13, DD15, DD16
ELECTRICAL SYSTEM
0803-18 SPN 3031
EQUIPMENT
sbw8329
EQUIPMENT
0312-18
EQUIPMENT