This PACCAR DTC 44203 auxiliary oil temperature gauge diagnostic manual covers troubleshooting and repair procedures for inoperative auxiliary transmission temperature gauges on PACCAR-equipped trucks from 2011 and newer model years. Published by PACCAR as part of their Electrical System Service Manual, this 6-page technical document guides certified technicians through systematic diagnosis using the Electronic Service Analyst (ESA) diagnostic tool.
The manual addresses both DTC 44203 (open circuit) and DTC 44204 (short circuit) fault codes related to the thermistor-based auxiliary transmission oil temperature gauge system. Step-by-step procedures help technicians isolate faults in the CVSG data link wiring, sensor connector continuity, Chassis Node electrical connections, and the temperature sensor itself.
Document details and specifications — PACCAR DTC 44203
| Brand | PACCAR (Peterbilt, Kenworth, DAF) |
| Model coverage | 2011 and newer PACCAR trucks |
| System/Group | DTCs / Cab Electrical System |
| Publication number | PM819003 / KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 6 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Table of contents
- Auxiliary Transmission Oil Temperature Gauge Inoperative symptom overview
- DTC 44203 and DTC 44204 diagnostic procedures
- ESA hardware/software diagnostic tool instructions
- Step-by-step monitoring and simulation tests
- CVSG data link wiring checks and daisy chain verification
- Sensor connector Pin A (ground) and Pin B (signal) continuity testing
- Chassis Node Pinout reference and terminal details
- Oil temperature sensor thermistor resistance table (−40°F to 392°F)
- Resistor decade box simulation method
- Fault isolation between wiring, sensor, and CECU
Applies to these models
This PACCAR DTC 44203 manual applies to Peterbilt, Kenworth, and DAF trucks equipped with PACCAR engines and multiplexed instrumentation systems manufactured from 2011 onwards. It covers the auxiliary transmission oil temperature circuit, Chassis Node controller module (CECU), and the thermistor temperature sensor assembly used in PACCAR cab electrical systems. For official PACCAR technical resources and current service bulletins, visit PACCAR official website.
Who needs this PACCAR DTC 44203 auxiliary manual
Diesel technicians and workshop owners servicing PACCAR trucks need this PACCAR DTC 44203 auxiliary diagnostic guide when customers report inoperative temperature gauges in the instrument cluster. Fleet maintenance managers troubleshooting electrical faults will find the resistance reference table and ESA simulation procedures essential for rapid fault isolation and component replacement decisions.
The complete DTC 44203 auxiliary oil temperature gauge diagnostic PDF is available in the DiagTechPro manuals library. A free account is required to download this service manual and access related PACCAR electrical system documentation.
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