This is the 2013 PACCAR MX turbo speed diagnostic service manual covering fault code P1235 for EPA2013-compliant MX engines. Published by PACCAR, this technical document provides mechanics and workshop technicians with step-by-step troubleshooting procedures, electrical test values, and component replacement guidance for turbo speed sensor faults. The manual includes wiring harness diagrams, sensor specifications, and detailed drive cycle validation procedures.
Document details and specifications — PACCAR MX turbo
| Brand | PACCAR |
| Model coverage | MX Engines (EPA2013) |
| System/Group | DTCs / Turbocharger Management |
| Publication no. | P1235 |
| Year/Revision | 2013 |
| Pages | 4 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- Fault code P1235 description and trip conditions
- Component description and system effects
- Diagnostic conditions and fault set criteria
- Reset conditions and drive cycle validation
- Electrical wiring diagrams and connector pinouts
- Technical data and component testing procedures
- Possible causes and root cause analysis
- Step-by-step diagnostic troubleshooting
- Verification drive cycle procedures
- PACCAR Engine Support contact information
Applies to these models
This PACCAR MX turbo speed manual applies to all trucks equipped with 2013 EPA-compliant PACCAR MX engines featuring turbocharged powertrains with electronic boost pressure monitoring. The diagnostic procedures address the turbo speed sensor (F683) installed on the turbine-compressor shaft and its integration with the PCI ECU (D420). For more information about PACCAR engines and official technical resources, visit PACCAR official website.
Who needs this MX turbo speed manual
This MX turbo speed diagnostic manual is essential for certified diesel mechanics, fleet technicians, and workshop owners performing fault code diagnosis and turbocharger system repairs on PACCAR MX-equipped trucks. Technicians require this guide to accurately test sensor circuits, validate electrical measurements against specification, and complete proper drive cycle validation before confirming repairs.
The complete P1235 diagnostic service manual PDF is available in the DiagTechPro manuals library. Create a free account to download the full 4-page document with all wiring diagrams, technical data tables, and step-by-step troubleshooting procedures.
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