This is the official 2013 PACCAR MX diagnostic service manual covering MX injector solenoid fault code P1204, which triggers when cylinder 1 injector voltage exceeds safe limits or detects a short circuit to the ECU supply. Published by PACCAR for MX-series engines meeting EPA 2013 emissions standards, this document provides complete diagnostic procedures, electrical schematics, technical specifications, and step-by-step troubleshooting for fuel injection system faults.
The manual addresses voltage monitoring on the D420 ECU pin A2, covering both high-side voltage detection and sense resistor current measurement thresholds that activate this MX injector solenoid fault code.
Document details and specifications — MX injector solenoid
| Brand | PACCAR |
| Model coverage | MX Series Engines |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | P1204 |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Table of contents
- Fault code description and information
- Component description and control operation
- Injector calibration codes and programming requirements
- Diagnostic conditions and set/reset criteria
- Electrical diagrams (D420 PCI ECU, B460/B461 connectors, injector solenoids B421-B426)
- Pinout reference for signal high/low wiring
- Technical data: component resistance checks for cylinders 1–6
- Diagnostic step-by-step procedure (Steps 1–4)
- Verification drive cycle validation
Applies to these models
This MX injector solenoid fault code document applies to 2013 PACCAR MX-series diesel engines equipped with six-cylinder fuel injection systems controlled by PCI ECU with D420 connector assemblies. The manual covers all six injector solenoid circuits (cylinders 1–6) and their associated harness connectors (B460, B461, B421–B426). For additional engine and vehicle specifications, visit PACCAR official website.
Who needs this injector solenoid fault code manual
Diesel mechanics, workshop technicians, and fleet service managers diagnosing fuel injection electrical faults on PACCAR MX engines must reference this manual. The injector solenoid fault code P1204 procedure requires DAVIE diagnostic software access and detailed knowledge of ECU pinouts, solenoid valve resistance specifications, and electrical continuity testing protocols outlined in this technical guide.
The complete injector solenoid fault code P1204 PDF is available in the DiagTechPro manuals library. Free account registration is required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
