This PACCAR general oil temp sensor circuit procedure documents DTC44103, logged when the Chassis Node on a multiplexed Kenworth or Peterbilt detects an open in the general oil temperature thermistor sensor circuit used for select optional components. Published under bulletin PM819003/KM815056 (09/16/2011) as part of the Electrical System Service Manual, the page walks through Electronic Service Analyst gauge simulation, CVSG data link wiring checks, and Pin A/B continuity to the Chassis Node before pinning a general oil temp sensor fault on the sensor itself.
Document details and specifications — general oil temp
| Brand | PACCAR |
| Model coverage | Kenworth and Peterbilt trucks, 2011 and newer, CECU3 with Chassis Node |
| System/Group | DTCs / Cab (2011 & Newer) — Electrical System Service Manual |
| Publication no. | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Table of contents
- General Oil Temperature Gauge Inoperative
- DTC44103 and DTC44104
- Step 1-3: ESA Connect, Monitor, Simulate
- Step 4: Diagnose gauge DTCs (Open circuit path)
- Step 5: Sensor and Chassis Node Pin 9 continuity checks
- Step 6: Confirm open-in-sensor vs. open-in-wiring
Applies to these models
This oil temp sensor diagnostic applies to PACCAR-built Kenworth and Peterbilt trucks with the CECU3 multiplexed electrical system and Chassis Node, model year 2011 and newer, on units equipped with the optional general oil temperature gauge that reads inoperative while other gauges work. See the PACCAR official site for chassis and engine platform coverage.
Who needs this oil temp sensor manual
Technicians who pulled an active DTC44103 on ESA need this oil temp sensor walkthrough to check continuity between the sensor connector and Pin 9 of the Chassis Node connector B before replacing the sensor or the dash gauge itself.
The full PDF, including the oil-temperature resistance table is available in the DiagTechPro manuals library; a free account is required to download.
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