This is the PACCAR DTC 57803 57804 electrical system service manual covering front drive axle oil temperature gauge diagnostics and repair. Published by PACCAR for cab electrical system faults on 2011 and newer vehicles, this document provides step-by-step troubleshooting procedures using the Electronic Service Analyst (ESA) diagnostic tool. The manual addresses both open-circuit (DTC 57803) and short-circuit (DTC 57804) failures in the axle oil temperature measurement system.
The diagnostic procedures assume technician familiarity with ESA hardware and software, and guide users through component monitoring, simulation testing, and sensor continuity verification. The document includes a complete thermistor resistance-to-temperature reference table for manual sensor simulation testing.
Document details and specifications — PACCAR DTC 57803
| Brand | PACCAR |
| Model coverage | PACCAR trucks 2011 and newer |
| System/Group | Electrical System / DTCs Cab |
| Publication number | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 5 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Table of contents
- Front Drive Axle Oil Temperature Gauge overview
- DTC 57803 and DTC 57804 symptom description
- ESA diagnostic workflow and step-by-step procedures
- Monitor and Simulate functions in ESA
- CVSG data link wiring inspection and continuity checks
- Sensor connector pinout verification (Pin A ground, Pin B signal)
- Chassis Node connector terminal locations
- Thermistor resistance reference table (−40°F to 392°F)
- Jumper wire testing for open circuit confirmation
- Short-to-ground circuit diagnosis methodology
- Sensor replacement procedures
Applies to these models
This PACCAR DTC 57803 57804 manual applies to all PACCAR-equipped trucks manufactured in 2011 and newer model years with cab-mounted electrical systems and multiplexed instrumentation. It covers the front drive axle oil temperature gauge circuit exclusively, including the thermistor sensor and signal wiring from the Chassis Node to the gauge display unit.
For further technical resources and official PACCAR documentation, visit PACCAR official website.
Who needs this PACCAR DTC 57803 57804 manual
This DTC 57803 57804 guide is essential for diesel technicians, electrical system specialists, and workshop owners diagnosing inoperative front drive axle oil temperature gauges on PACCAR trucks. Technicians using ESA diagnostic software will find the complete troubleshooting workflow, sensor specifications, and resistance values necessary to isolate faults between wiring, sensors, and control modules.
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