This PACCAR transmission oil temperature gauge procedure documents DTC17703 (open circuit) and DTC17704 (short circuit), the two faults the CECU logs when a multiplexed Kenworth or Peterbilt loses a reading from its thermistor sensor on the transmission oil temperature gauge circuit. Published under bulletin PM819003/KM815056 (09/16/2011) as part of the Electrical System Service Manual, it uses the Electronic Service Analyst (ESA) tool to walk the technician from gauge simulation through CVSG data link wiring checks and 52 Pin CECU connector continuity to a final sensor-versus-wiring verdict for the oil temperature gauge.
Document details and specifications — transmission oil temperature
| 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 | 5 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Table of contents
- oil temperature gauge Inoperative
- DTC17703 and DTC17704
- Step 1-3: ESA Connect, Monitor, Simulate
- Step 4: Diagnose oil temperature gauge DTCs
- Step 5: Ground and signal wire checks at sensor Pin A/B
- Step 6-7: Jumper test and resistance table (-40°F to 392°F)
Applies to these models
This oil temperature gauge diagnostic applies to PACCAR-built Kenworth and Peterbilt trucks with the CECU3 multiplexed electrical system, model year 2011 and newer, where the oil temperature gauge on the dash is inoperative while every other gauge functions normally. See the PACCAR official site for chassis and engine platform coverage.
Who needs this oil temperature gauge manual
Technicians who pulled DTC17703 or DTC17704 on ESA need this oil temperature gauge routine to confirm continuity between the sensor connector and Pin 21 of the 52-pin CECU connector C before swapping the sensor or a known-good gauge.
The full PDF, including the thermistor resistance table is available in the DiagTechPro manuals library; a free account is required to download.
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