This PACCAR fuel filter restriction gauge codes manual covers DTC 1603 and DTC 1604 troubleshooting for the Electrical System Service Manual. Published by PACCAR for authorized technicians and workshop owners, this document provides comprehensive procedures to diagnose and repair multiplexed instrumentation problems using the Electronic Service Analyst (ESA) diagnostic tool on PACCAR trucks from 2011 and newer model years.
The fuel filter restriction gauge procedures are essential when the fuel filter restriction gauge becomes inoperative while all other gauges remain functional. This technical guide walks mechanics through sensor testing, voltage checks, wiring continuity verification, and component replacement steps to resolve DTC 1603 (open circuit) and DTC 1604 (short circuit) faults.
Document details and specifications — fuel filter restriction
| Brand | PACCAR |
| Model coverage | PACCAR trucks (2011 and newer) |
| System/Group | DTCs / Cab Electrical System |
| Publication no. | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Table of contents
- Fuel Filter Restriction Pressure Gauge Inoperative — DTC 1603 and DTC 1604
- Symptom and System Description
- Step-by-Step Diagnostic Procedures using ESA
- CVSG Data Link Wiring Checks
- Sensor Ground, Input Voltage, and Output Voltage Testing
- Chassis Node Pinout and Terminal Details
- DTC 1603 Troubleshooting (Open Circuit)
- DTC 1604 Troubleshooting (Short Circuit)
- Connector Inspection and Wiring Repair Guidelines
- CECU Pinout Reference
Applies to these models
This filter restriction gauge service manual applies to all PACCAR trucks manufactured from 2011 and newer equipped with multiplexed instrumentation systems and CECU (Chassis Electronic Control Unit) configurations. The procedures use the Electronic Service Analyst (ESA) hardware and software diagnostic platform for accurate fault code retrieval and sensor simulation testing. PACCAR official website
Who needs this filter restriction gauge manual
Certified PACCAR technicians, independent diesel mechanics, and workshop owners diagnosing inoperative filter restriction gauges must consult this filter restriction gauge guide. Technicians performing instrumentation repairs and electrical system troubleshooting require knowledge of ESA software and CECU pinout configurations to effectively use these procedures.
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