This is the 2013 PACCAR MX Diagnostic Service Manual covering PACCAR MX intercooler efficiency P1110, published by PACCAR for diesel engine diagnostics and repair on EPA 2013-compliant vehicles. The manual provides comprehensive diagnostic procedures, wiring diagrams, technical data, and step-by-step troubleshooting for mechanics and workshop owners.
The PACCAR MX intercooler efficiency P1110 is triggered when the ECU detects cooling capacity of the intercooler is too low for more than 40 seconds. This 9-page technical bulletin includes sensor specifications, connector pinouts, and repair verification procedures required to resolve the fault.
Document details and specifications — PACCAR MX intercooler
| Brand | PACCAR |
| Model coverage | PACCAR MX engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA2013) — Boost readiness group |
| Publication number | P1110 |
| Year/Revision | 2013 |
| Pages | 9 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- Code number P1110 and fault code description
- Fault code information (MIL trips, recovery cycles, readiness group)
- Component description and system effect
- Diagnostic conditions and set/reset criteria
- Electrical diagram and wiring harness connectors (D420 PCI ECU, F750 intercooler temperature sensor)
- Technical data: Component check (intercooler temperature sensor F750 resistance values)
- Component and circuit check (ECU D420)
- Possible causes (contaminated intercooler, fan failure, sensor deviation, winterfront restriction)
- Additional information on cooling efficiency monitoring
- Step-by-step diagnostic procedure
- Step 1: Investigate related trouble codes
- Step 2: Intercooler checks (visual inspection, DAVIE monitor, pressure testing)
- Step 3: Repair verification cycles and Quick Check validation
- PACCAR Engine Support Center contact information
Applies to these models
This PACCAR MX intercooler efficiency manual applies to PACCAR MX-series diesel engines built to EPA 2013 emissions standards. It covers heavy-duty trucks equipped with turbocharger boost systems and intercooler temperature monitoring. Repair procedures reference the PCI ECU (D420), intercooler temperature sensor (F750), and related boost system components. For official PACCAR engine documentation and support, visit PACCAR official.
Who needs this MX intercooler efficiency manual
Diesel truck mechanics and workshop owners diagnosing P1110 faults on PACCAR MX engines need this manual. The MX intercooler efficiency troubleshooting guide is essential for technicians performing sensor testing, circuit verification, and repair validation on EPA 2013-compliant heavy-duty trucks.
The complete MX intercooler efficiency P1110 manual is available in the DiagTechPro manuals library. A free account is required to download the full 9-page PDF and access wiring diagrams, technical specifications, and diagnostic procedures.
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