This is the PACCAR DTC 57804 axle diagnostic service manual for front drive axle oil temperature gauge faults in PACCAR trucks from 2011 and newer. Published by PACCAR as part of their Electrical System Service Manual series, this 5-page guide provides step-by-step procedures for diagnosing and repairing inoperative front drive axle oil temperature gauges using the Electronic Service Analyst (ESA) hardware and software diagnostic platform. The manual addresses both DTC 57803 (open circuit) and DTC 57804 (short circuit) trouble codes affecting the thermistor-based temperature sensor system.
Document details and specifications — PACCAR DTC 57804
| Brand | PACCAR |
| Model coverage | PACCAR trucks 2011 and newer |
| System/Group | DTCs / Cab Electrical System |
| 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 and thermistor sensor operation
- Step-by-step diagnostic procedure using ESA Monitor function
- ESA Simulate test method for gauge response verification
- CVSG data link wiring and continuity checks (Pins 1, 3, 14, 15)
- DTC 57803 diagnosis – open circuit fault procedures and sensor replacement
- DTC 57804 diagnosis – short to ground fault procedures
- Sensor connector pinout and Chassis Node connection details
- Thermistor resistance-to-temperature reference table (–40°F to 392°F)
- Alternate test methods using resistor decade box simulation
- Wiring continuity verification between sensor and Chassis Node Pin 13
Applies to these models
This manual applies to PACCAR trucks manufactured 2011 and newer equipped with front drive axle oil temperature gauge systems. The diagnostic procedures cover the thermistor sensor circuit, CVSG data link harness, Chassis Node electrical connections, and the 52-pin CECU (Chassis Electronic Control Unit) connector. Technicians should reference the Chassis Node Pinout documentation for complete terminal details. For official PACCAR technical support and additional service manuals, visit PACCAR official site.
Who needs this PACCAR DTC 57804 axle manual
This PACCAR DTC 57804 axle diagnostic manual is essential for technicians and workshop owners diagnosing gauge faults on PACCAR trucks. If your shop uses ESA diagnostic software and encounters inoperative front drive axle oil temperature gauges, this guide provides the complete testing sequence from initial ESA communication through component replacement procedures.
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