This is the 2013 PACCAR MX diagnostic service manual covering CAN communication codes U178B, specifically diagnostic trouble code U178B. Published by PACCAR for technicians and workshop owners, this technical reference document provides fault code descriptions, electrical diagnostics, and step-by-step troubleshooting procedures for CAN network communication failures on EPA 2013 compliant MX engines.
The document focuses on CAN communication codes U178B related to body builder module message transmission errors and network integrity issues.
Document details and specifications — CAN communication codes
| Brand | PACCAR |
| Model coverage | 2013 MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | Not specified |
| Year/Revision | 2013 |
| Pages | 4 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Table of contents
- Fault code U178B description and information
- Component description and location
- Diagnostic conditions and set/reset criteria
- Electrical diagrams and wiring references
- Technical data and possible causes
- Step-by-step diagnostic troubleshooting procedure
- Verification and repair confirmation drive cycle
Applies to these models
This communication codes U178B document applies to 2013 PACCAR MX engines meeting EPA 2013 emissions standards. The code U178B addresses communication failures between the engine control module and body builder modules via the CAN network. For additional technical resources and official PACCAR documentation, visit PACCAR official.
Who needs this communication codes U178B manual
This communication codes U178B guide is essential for diesel truck mechanics, diagnostic technicians, and workshop owners servicing 2013 PACCAR MX engines. Technicians troubleshooting CAN network failures, electrical connector issues, or body builder module communication errors will find the diagnostic steps and wiring information invaluable for accurate fault identification and repair.
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