This PACCAR auxiliary transmission oil gauge inoperative diagnostic manual covers DTC 44203 and DTC 44204 for 2011 and newer cab electrical systems. Published by PACCAR as part of the Electrical System Service Manual, this document provides step-by-step procedures for technicians to diagnose multiplexed instrumentation problems using the Electronic Service Analyst (ESA) hardware and software diagnostic tool.
The manual addresses both open and short circuit conditions in the auxiliary transmission oil temperature circuit, including sensor diagnosis, wiring verification, and component replacement procedures.
Document details and specifications — PACCAR auxiliary transmission
| Brand | PACCAR |
| System/Group | DTCs / Cab Electrical |
| 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
- ESA diagnostic procedure: Monitor step
- ESA diagnostic procedure: Simulate step with CVSG data link wiring checks
- ESA diagnostic procedure: Diagnose step for DTC 44203 and DTC 44204
- Sensor connector continuity testing (Pin A ground, Pin B signal)
- Oil temperature sensor thermistor resistance table (-40°F to 392°F)
- DTC 44203 troubleshooting: open circuit diagnosis
- DTC 44204 troubleshooting: short circuit diagnosis
- Sensor replacement confirmation procedures
Applies to these models
This auxiliary transmission oil temperature gauge inoperative guide applies to PACCAR-equipped heavy-duty trucks from 2011 forward with cab-mounted electronic instrumentation and multiplexed CVSG data link systems. It covers thermistor-type oil temperature sensors connected to the Chassis Node through two-pin harness connectors.
For additional PACCAR technical resources and support, visit PACCAR official.
Who needs this PACCAR auxiliary transmission oil gauge inoperative manual
Diesel truck mechanics and workshop technicians diagnosing inoperative auxiliary transmission oil temperature gauge conditions need this guide. Professionals performing electrical troubleshooting with ESA software will find the systematic procedures essential for identifying whether faults originate in the sensor, wiring harness, CVSG data link chain, or control electronics.
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