This PACCAR pyrometer gauge DTC diagnostic manual provides step-by-step repair procedures for inoperative pyrometer gauges on PACCAR trucks manufactured 2011 and newer. Published by PACCAR, the document covers electrical system troubleshooting using the Electronic Service Analyst (ESA) diagnostic tool and explains how to identify open or short circuits in the exhaust temperature measurement circuit.
The pyrometer uses a thermocouple sensor to measure engine exhaust gas temperature after the turbo, and this guide walks technicians through isolation testing to determine whether the fault lies in the sensor, wiring harness, gauge cluster, or the Instrument Control Unit (ICU).
Document details and specifications — PACCAR pyrometer gauge
| Brand | PACCAR |
| Model coverage | 2011 and newer PACCAR trucks |
| System/Group | DTCs / Cab Electrical System |
| Publication number | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Table of contents
- Pyrometer Gauge Inoperative – Symptom and Overview
- Step 1: ESA Connection and Monitoring
- Step 2: Exhaust Temperature Component Monitoring
- Step 3: Simulation and Gauge Response Testing
- Step 3-1 through 3-7: CVSG Data Link Wiring and Gauge Diagnostics
- Step 4: DTC 17303 and DTC 17304 Identification
- Step 5: Pyrometer Sensor Connector Testing and Resistance Table
- Step 6: Open Circuit Diagnosis (DTC 17303)
- Step 7: Short Circuit Diagnosis (DTC 17304)
Applies to these models
This manual applies to PACCAR trucks from model year 2011 and newer equipped with multiplexed instrumentation and thermocouple-based pyrometer gauges. It covers diagnostic procedures for DTC 17303 (open exhaust temperature circuit) and DTC 17304 (short exhaust temperature circuit). For official PACCAR technical documentation and specifications, visit PACCAR official.
Who needs this PACCAR pyrometer gauge DTC manual
Diesel truck mechanics, electrical technicians, and workshop owners diagnosing gauge cluster failures on PACCAR trucks need this manual. The guide is essential for anyone using ESA software to isolate PACCAR pyrometer gauge DTC and verify sensor, wiring, or component failures in the cab electrical system.
The complete pyrometer gauge DTC service manual is available in the DiagTechPro manuals library. A free account is required to download the PDF.
Related manuals library
