This is the official 2013 PACCAR MX diagnostic service manual covering MX CAN communication U117C fault code U117C, published by PACCAR for technicians diagnosing intermediate gas temperature sensor communication failures on EPA 2013-compliant MX engines. The manual provides complete electrical schematics, step-by-step troubleshooting procedures, and technical data required to resolve CAN network communication errors related to the A1SCREGT2 emissions system message.
The U117C code is triggered when the engine control module detects that the intermediate gas temperature signal has gone out of range on the CAN network, indicating a communication breakdown rather than a sensor failure. This 4-page document includes visual inspection checklists, diagnostic test procedures using DAVIE software, and contact information for PACCAR Engine Support.
Document details and specifications — MX CAN communication
| Brand | PACCAR |
| Model coverage | MX engines (all 2013 EPA-regulated models) |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | Not specified in document |
| Year/Revision | 2013 |
| Pages | 4 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Table of contents
- Fault code description and set conditions
- Fault code information (MIL trips, drive cycle recovery, freeze frame type)
- Component location and diagnostic conditions
- Electrical diagram(s)
- Technical data and specifications
- Possible causes: CAN network breakdown, wiring interruption, short circuits to ground or supply
- Step-by-step diagnostic procedure (Steps 117C-a through 117C-d)
- Visual inspection requirements
- Data check test methodology
- Component repair and replacement guidance
- Verification drive cycle procedure
Applies to these models
This MX CAN communication U117C manual applies to all 2013 EPA-regulated PACCAR MX engines equipped with CAN-bus architecture and emissions control systems. The diagnostic procedures cover vehicles experiencing U117C fault codes related to the A1SCREGT2 message, intermediate gas temperature sensor circuit failures, and CAN network communication interruptions. For official PACCAR resources and additional technical support, visit PACCAR official website.
Who needs this MX CAN communication U117C manual
This CAN communication U117C diagnostic manual is essential for heavy-duty diesel mechanics, truck workshop owners, and technicians servicing 2013 PACCAR MX engines experiencing U117C fault codes. Technicians using DAVIE diagnostic software to troubleshoot intermediate gas temperature sensor and CAN network communication issues will find the electrical schematics, step-by-step procedures, and PACCAR Engine Support contact information invaluable for rapid diagnosis and repair.
The complete PDF manual is available in the DiagTechPro manuals library. A free account is required to download this CAN communication U117C service document and access the full range of diagnostic resources for heavy-duty truck repair.
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